Grey Cast Iron Is Ductile Or Brittle



Properties with values for just one material (2, in this case) are not shown. Hoe excels in both. If the fluid contained is flammable you should not used cast iron. Grades 25, 30, 35 and 40 can fill specific requirements for hardness and wear, and heat treatments can yield even higher mechanical properties. Ductile Cast Iron. This paper presents the process of getting the qualified molten iron through melting scrap, carburant and moderate cast pig iron, which offers a new way for producing ductile iron. With same day shipping on items in stock, we can help you reduce costly down time. - grey cast iron - white cast iron brittle, What happens when you heat treat White CI? more ductile than gray cast iron. Payza Casting - Turkey supplier of manhole cover, ductile iron, cast. Antonyms for ductile. Customized Superior Quality Cast Iron Park Bench Legs for Outdoor Street Garden Furniture. Recent development of ductile cast iron production technology in China *Cai Qizhou and Wei Bokang (State Key Lab of Material Processing and Dies & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China) Abstract: Recent progress in the production and technology of ductile cast iron castings in China is reviewed. The best method to classify cast iron is according to metallographic structure. Ductile Iron tensile strength is 60K vs Cast Iron at 31K. Dura-Bar G2 is still considered an engineered material, having properties that are more than suitable for a wide variety of applications. Nodular graphite cast iron QT450-10 is a nodular graphite cast iron with high toughness and plasticity. * 2 Ductile iron was invented by H. Essentially, these are internal stress concentrations. There are two predominant types of cast iron, those being grey iron and white iron. Cast iron is a family of metals that are iron-carbon-silicon alloys containing more than 2% carbon (C), usually 1 - 3% silicon (Si) and a few other elements for various purposes. Brittle substances are liable to break easily. Iron foundries cast 3 major types of iron: gray iron, ductile iron, and malleable iron. Consequently, research has been conducted and ductile iron is considered as a better choice than cast iron because it can resist the same traffic loads with lower self-weight. Cast iron, whether ductile or gray, doesn't accept structural welds (and this is one), but only repair welds. Ductile iron has higher tensile strength and toughness similiar to steel. Based on the microstructure of gray cast iron, the graphite form flakes, which is tiny. Payza Casting - Turkey supplier of manhole cover, ductile iron, cast. A versatile, high quality alloy for use with steel, malleable cast iron, grey cast iron, German (nickel) silver, nickel- and copper alloys. Get Contact details & address of companies manufacturing and supplying Ductile Iron Pipe across India. Ductile iron pipe typically will use magnesium in the manufacturing process. Ductile cast iron is an important cast material to the designer which combines the advantages of cast iron, such as cheapness, ease of machining, low melting temperature, good. Ductile iron is a type of cast iron with nodular graphite inclusions that is less brittle than most cast irons. Most decisions required compromise. Difference in Properties of Cast Iron and Mild Steel When choosing products made from metal, it is important to understand the properties of the metal that the product is made of. Soil pipe and ittings were among the irst ductile iron applications due to the product strength requirements. Fonderie Saguenay are a jobbing shop specializing in producing components in materials such as gray iron and ductile iron. Moreover, you don't have to be overly choosy about your drill bit. tough material Mechanics Preventive Maintenance Engineering Question added by Ridha SAIDANI , Preventive Maintenance Manager , SOMIPHOS / Mining Complex of DJEBEL ONK. The types of cast iron are as: (i) White cast iron (ii) Malleable cast iron (iii) Gray cast iron (iv) Chilled cast iron (v) Alloy cast iron (vi) Nodular cast iron or Ductile iron (Lin and Huang, 1996). Grey cast iron, Ductile Cast Iron, Ni-resist, Austempered Ductile iron, high chrome cast iron, Compacted Graphite cast iron,Ni-resist grey iron casting. Brake shoes, railroad: cast iron. Though it can have any percentage of carbon between 2% to 6. The production of ductile iron is 30-35% cheaper than steel and 3-4% times cheaper than non-ferrous alloys and only 20-30% more costly than normal grey iron. Differences in the amount of carbon present and in the form in which it occurs are responsible for some differences in the corrosion behavior of these materials. 2 % carbon and 0. The dark appearing microstructure shown in both images above are hard brittle compound Fe 3C (cementite). Changes are incorporated into this edition of the standard. Cast iron can be made directly from the molten pig iron or by re-melting pig iron, often along with substantial quantities of iron, steel, limestone, carbon (coke) and taking various steps to remove undesirable contaminants. Cast Iron – is a hard relatively brittle allow of iron and carbon and can be easily cast in a mold and contains a higher proportion of carbon than steel and is either grey or white in color. Specifically, what makes grey iron "grey iron," is the graphite flake structure that is created during the cooling process from the carbon that is in the component. It is the most common cast iron and the most widely used cast material based on weight. Our foundry manufactures high quality castings ranging in size from a few pounds up to 1,000 lbs. Keough, PE Kathy L. Servicing WORLDWIDE. It contains spheroid graphite in the as cast condition, through the addition of nucleating agents such as cerium or magnesium to the liquid iron [2, 4]. In fact, ductile iron has. Compacted (vermicular) Graphite Iron is a form of cast iron that mixes some of the beneficial properties of grey iron and ductile iron to produce a material that is neither a grey iron or a fully ductile iron but can be described as a "half way house" between the two. Melting Capabilities (2) Brown Boveri 11 ton/hour Coreless Melting Furnaces (35 ton holding capacity each) (3) Ajax 1500kw Jet Flow 3. Cast iron can be classified into grey cast iron, white cast iron, malleable cast iron and ductile cast iron, depending on its composition. It is measured as a percentage increase in length on rupture compared with original length and is termed percentage elongation, or elongation. The production of ductile iron is 30-35% cheaper than steel and 3-4% times cheaper than non-ferrous alloys and only 20-30% more costly than normal grey iron. Ductile iron is often used as a cost effective alternative to steel castings. All samples are etched using 2% nital. What are the differences between ductile iron and cast iron? Ductile iron is less brittle than other cast iron, even before heat treatment. Consequently, the contents of aluminium should always be kept low, preferably in the range described above. Ductile iron is typically twice as strong as many grey cast irons, and nearly as strong as steel. Payza Casting - Turkey supplier of manhole cover, ductile iron, cast. Ductile cast iron can only be repaired using NickelRod #55 due to its higher tensile strength and better ductility. , Ltd is located in CaoQiao industrical Zone, Xueyan Town, Wujin District, ChangZhou City, also closed in scenic Taihu Lake area. White cast iron is hard and offers excellent resistance against abrasions. Prior to the development of Ni-Fe-Mn, the major advancement in filler metals for cast iron welding was NI-ROD FC 55, a flux-cored continuous welding wire for use with flux-cored arc welding (FCAW) and submerged arc welding (SAW). - Generally EN Standard is the most popular standard in Europe, Africa, Asia & Australia, but for our customers of America we manufacture the. There are many ways of classification cast irons. Magnesium is added to the melt in the form of a master alloy (∼46% silicon, 5% magnesium, balance iron). The new tube portfolio, produced utilizing either a proprietary continuous cast process or trepan process, is now available in a selection of sizes and grades. The type of cast iron most commonly use is gray. The welding of cast-iron may be performed with or without preheating. Cast iron is generally thought of as a weak, dirty, cheap, brittle material that does not have a place in applications requiring high strength and defined engineering properties. Ductile Iron is also called ductile cast iron, spheroidal graphite cast iron, or nodular cast iron. Precision Ductile Iron Casting Manufacturers, Factory, Suppliers From China, We have now deep cooperation with hundreds of factories all over China. Search Product: All Categories Iron casting Vehicle spare parts Mining machinery spare parts Fire hydrant parts Cast iron valve parts Cast iron pump parts Cast iron housing Agriculture. Ductile iron can be bent without breaking, whereas cast iron is brittle and breaks when bent. Milles ( U. 16 (AWWA C 116) - Protective Fusion Bonded Epoxy Coating for the Interior and Exterior Surfaces of Ductile Iron and Grey iron Fittings for Water Supply Service. We cater to a wide variety of markets; automotive, pumps & valves are a few. AWWA C115 - Ductile-Iron Threaded Pipe - Dimensions - Dimensions of threaded ductile-iron pipe according AWWA C115; Cast Iron - There are four basic types of cast iron - white iron, gray iron, ductile iron and malleable iron; Gas Pipes - Approved Materials - Materials approved for gas pipes. tough material Mechanics Preventive Maintenance Engineering Question added by Ridha SAIDANI , Preventive Maintenance Manager , SOMIPHOS / Mining Complex of DJEBEL ONK. As the name suggests, it was developed to overcome the brittle nature of grey and white irons. Cast iron is a family of metals that are iron-carbon-silicon alloys containing more than 2% carbon (C), usually 1 - 3% silicon (Si) and a few other elements for various purposes. de DIN EN 1044-CU305 (L-CuNi10Zn42), Schmelzbereich 890°C - 920°C, Arbeitstemperatur 910°C. Generally, gears are fixed to their shafts by means of a key. Well, bronze is easier to cast, but it is harder to forge. [1] It is the most common cast iron and the most widely used cast material based on weight. • Ductile iron fl anges are rated higher than grey iron fl anges. Alloy Cast Iron. In Cast Iron, the graphite is present in plate-like flakes, which makes Cast Iron brittle. Producing gray iron, ductile iron, steel castings. In that time, it has evolved from a complicated material that required the foundry metallurgist s highest skill and. Nodule property is achieved by adding magnesium. Alloy Cast Iron. Difference Between Ductile and Brittle Definition. The common defining characteristic of this group of materials is the shape of the graphite. It is usual to assume that the ferritic matrix is homogeneous. A good finished product begins with the material you decide to machine it from. en Moreover, the differences between grey and ductile cast iron mentioned above only affect the required design of the casting (i. By contrast, ductile iron pipes will withstand corrosion underground well for spans of 150 years, or more. Grey cast iron The presence of graphite flakes is due to the addition of silicon, which acts to stabilise carbon in the form of graphite as opposed to iron carbide. Grey cast iron, Ductile Cast Iron, Ni-resist, Austempered Ductile iron, high chrome cast iron, Compacted Graphite cast iron,Ni-resist grey iron casting. Colour micrographs are produced by first etching with 2% nital, followed by open air heat treatment of the metallographic sample at 270 o C for 3 h. There are two predominant types of cast iron, those being grey iron and white iron. The amount of carbon in this alloy is very high compared to steel. : Cast iron is a A. Malleable iron: traditional form of cast iron with reasonable ductility. Ductile iron, also referred to as nodular iron or spheroidal graphite iron, was patented in 1948. Modern steel has been available in bulk since the invention of the Bessemer process in the 1860's. Making it an excellent alternative to steel, even in dynamically loaded applications. TECHNICAL REPORT - Dimensional Based Particulars of Heavy Duty Cast Iron Manhole Covers Friday, 24 February 2017 Ductile and Grey Iron Manhole Covers RD690-27. Graphite flakes interrupt the continuity of gray cast iron matrix and as such contribute to the damping properties of that material and to its brittleness. ISO 9001 & AS 9100B certified distributor of gray & ductile iron continuous cast bars. Gray cast irons are mechanically weak and brittle due to sharp tips and brittleness of graphite flakes which act as stress concentration points and produce "notch-effect". 5-IEC 180 DRG# K2144/86: United Kingdom: Tuticorin ICD: KGS: 49: 13,312: 272: Nov 17 2016: 73251000: GREY IRON CASTINGS - (MACHINED) CASING 40-200 VIL PN16 CL DRG # 427046-511. The present state of knowledge on the microscopic factors affecting the fracture and the fracture toughness of different types of cast irons: namely, grey, white, ductile, malleable, and compacted. As a less brittle alloy than cast iron, it is used in applications where ductility and impact resistance is useful. Binzhou Tripower Machinery MFG Co. For example, grey cast iron is inherently brittle and often cannot withstand stresses set up by a cooling weld. Specifically, what makes grey iron "grey iron," is the graphite flake structure that is created during the cooling process from the carbon that is in the component. We provide full service- from a design, through modelling performance and castings production, machining and painting to completing and delivery. In cast iron …cast iron is either so-called gray iron or white iron, the colours shown by fracture. Ductile-brittle transition temperature;. It does not fracture as easily with impact. Cast iron is iron with 2 to 3 percent carbon or more. It is also quite ductile in the as-cast form and negates the need for long heat treatments such as those required to produce malleable iron. Ductile Iron combined with the metallurgical factors described above, have limited the weld­ ing of cast iron. En 124 C250KN test load […]. Nodular Cast Irons Production of Nodular cast iron. 0 ton/hour Electric Channel Induction Furnace (35 ton holding capacity per furnace) Venetta gas-fired pre-heaters; Quick Labs for iron analysis and melt analysis on melt deck ( Click on images for a larger view ). In comparison, gray cast iron is harder. There are several. is an iron foundry specializing in ductile and gray iron castings. 5 PN16 DRG # 427294-531: United Kingdom: Tuticorin ICD: KGS: 203: 64,033: 315: Nov 17 2016: 73251000: GREY IRON CASTINGS - (MACHINED) ADAPTORPLATE NEMA 8. Ductile iron • Ductile iron is known for its ductility and toughness after special magnesium, cerium, lanthanum treatment. While ductile iron is flexible, cast iron is not. Cast iron is great for engine blocks and anything that will be cast into irregular shapes, but cast iron tends to be brittle and can crack or break. Ferritic ductile iron can be produced “as-cast” but may be given an annealing heat treatment to assure maximum ductility and low temperature toughness. Ductile Iron: Ductile iron is the more expensive option, but for good reason. The company was founded in 1978. Brittle materials often have relatively large Young's moduli and ultimate stresses. Metals exposed to temperatures below this point are susceptible to fracturing, making this an important consideration when choosing which metals to use in extremely cold temperatures. Since ductile cast iron is stronger, these compact units can commonly replace standard units. : Cast iron is a A. 8% carbon, there is that much less graphite to counteract shrinkage. Ductile iron is typically twice as strong as many grey cast irons, and nearly as strong as steel. Carbidic Austempered Ductile Iron (CADI) John R. Cast iron is a brittle virtually non-maleable metal that is considered generally inflexible. Servicing WORLDWIDE. Thomas Dudley is committed to greener manufacturing. Dura-Bar ® ’s ability to engineer a combination of various graphite and matrix structures (ferritic versus pearlitic) results in a variety of ductile and gray iron grades with a full range of properties. The microstructure of ductile cast iron has many graphite balls. INTRODUCTION The U. When used in place of grey iron, the design of the casting is lighter. Ductile iron is a type of cast iron with nodular graphite inclusions that is less brittle than most cast irons. Our dedicated team of professionals continue to go above and beyond for our customers. Hayrynen, PhD Applied Process Inc. Graphite flakes interrupt the continuity of gray cast iron matrix and as such contribute to the damping properties of that material and to its brittleness. The gray iron has many graphite flakes. Standards: En124 LOAD CLASSES En 124 A15KN test load Areas which can be used by pedestruabs and pedal cylists En 124 B125KN test load For use in footways, car parks and parking decks. Cast iron is a great material for sliding machine parts and holds a special place in machine design. Milles ( U. Iron Casting in West Michigan. They are designed for use in cold harsh climates with snow removal concerns. There are exceptions to this relationship. Grey cast iron is more brittle than ductile iron so piping should impose minimal forces on the valves. Stringer beads or narrow weaves should be used. Gray iron exhibits these behaviors more markedly than nodular iron. , which has been in the field of iron casting since 1986. Another difference that can be seen is that iron rusts, while bronze does not. In fact, ductile iron has. The common defining characteristic of this group of materials is the shape of the graphite. Also provided is a history of the standard, information regarding the use of the standard, and the major revisions. Ill Test bars shall be cast in dry silica sand molds similar to that in which the castings are poured. The mechanism of inoculation and graphite nucleation in grey and ductile irons are explained. Gray Iron Castings up to 5,000 lbs & Ductile Iron Castings to 3,000 lbs. Gray iron may be too brittle for some applications, including instances when a casting must be especially thin or flexible. However, in the most international standards, cast iron hardness is not a necessary inspection specification. If an iron alloy exceeds about 2% car-bon, the carbon does not have to nucleate from decomposition of austenite, but instead, it can form directly from the melt by a eutectic reaction. Ductile (noDule ) cast iron 37 In ductile irons, the graphite is in the formof spherical nodules rather than flakes (as in grey iron), thus inhibiting the creation of cracks and providing the enhanced ductility. Pressure containing materials for low temperature service must be ductile. The type of cast iron most commonly use is gray. White iron, however, has small white deposits of cementite rather than being completely pallid. Standards: En124 LOAD CLASSES En 124 A15KN test load Areas which can be used by pedestruabs and pedal cylists En 124 B125KN test load For use in footways, car parks and parking decks. Properties with values for just one material (2, in this case) are not shown. With a complete pattern shop and 3D CAD design capabilities OK Foundry can develop a sand cast solution for most applications in gray or ductile iron. The occur­ rence of stress concentration as it is well known from lamellar structures is less pronounced. %) of Mg to gray iron changes the flake C microstructure to spheroidal that increases (by factor ~20) steel ductility 4. 12% P for gray irons and 0. Cast iron is iron mixed with small amounts of silicon and carbon, and cast -- rather than formed -- in place. Ductile iron contains the same ingredients as cast iron. The mechanism of inoculation and graphite nucleation in grey and ductile irons are explained. ) Ductile Iron Pipe were introduced to the market in 1955. The graphite nodules are small and constitute only small areas of weakness in a steel-like matrix. Search Product: All Categories Iron casting Vehicle spare parts Mining machinery spare parts Fire hydrant parts Cast iron valve parts Cast iron pump parts Cast iron housing Agriculture. While most varieties are brittle, due to the flake-like shape of the nodular graphite inclusions, the spherical shape of the graphite in ductile cast iron makes it more flexible and elastic. grey cast iron welds have been examined in the as-cast and fully ferritizing annealing conditions under preheat temperatures. fittings to be used with cast-iron and ductile-iron pressure pipe included in A21 standards. Ductile iron, also known as ductile cast iron, nodular cast iron, spheroidal graphite iron, spheroidal graphite cast iron and SG iron, is a type of cast iron invented in 1943 by Keith Millis. The Differences Between Ductile Iron and Gray Iron Castings. If we were to create a macroscopic stress concentration. Understanding Cast Irons - White Iron. The electrochemical tests involve measurement of corrosion potential in. Furthermore, these diffi­ culties are more severe than those encountered with gray cast iron (flake. Before discussing the individual elements, it is important to remember that the microstructure, and therefore, the properties of gray and ductile iron are determined by a balance between the chemistry of the iron (amounts of the various elements contained in the iron), the nucleation, and cooling rate of the iron. Murugesan et al. Producing High Quality gray iron casting to customer specification from 1/2 lb to 650 lbs ; We produce multiple grades of Gray Iron Castings as well as Ductile Iron Castings for a variety of industries. Grey cast iron is grey in color which is due to the carbon being principally in the form of graphite (C in free form in iron). E-140 has extremely low ductile-brittle transition temperature of <-90[degrees]C, corresponding to the glass transition of amorphous polyethylene. Our offer includes castings of 0,3-61 kg made from grey and ductile cast iron, produced mainly at the Customers' request. which changed the microstructure and gave us ductile iron. It is a strong structural material and also a good conductor of heat, making it a common material for cookware. Graphite in cast iron can take several forms, such as flakes of different sizes and distributions in gray cast iron and nodules in ductile cast iron. Loading Unsubscribe from David Lee? If you are seeking to purchase grey & sg/ductile cast iron for general engineering,. There are four basic types of cast iron: ductile, malleable, white and grey. 00 percent silicon, along with varying percentages of manganese, sulfur, and phosphorus. The difference is that white cast iron features cementite below its surface, whereas gray cast iron features graphite below its surface. Examples of ductile material: Mild steel; Aluminum; Copper; Rubber; Most plastics; Examples of brittle material: Cast iron; Ceramics such as glass, cement, concrete, etc. Expected failure for Mild Steel and Cast Iron Specimens and reasoning: Fracture in torsion for ductile materials generally occur in the plane of maximum shear stress perpendicular to the axis of bar where as for the brittle material failure occurs along 45° hilux to the axis of bar due to tensile stress across that plane. Ductile Iron is Grey Iron with the addition of magnesium to the alloy. Iron foundries cast 3 major types of iron: gray iron, ductile iron, and malleable iron. The alloy with greater pearlite content exhibited higher strength and higher ductile-to-brittle transition temperature. Brittle failure occurs suddenly and without warning. As the name suggests, it was developed to overcome the brittle nature of grey and white irons. Chemical Heat Treatment. The examples shown have all been determined during the examination of samples in Elkem’s Research facility in Norway. Another possibility for Control Committee 5J but other committees, including the Cast Iron the observed structures could be high sulfur-base iron contaminated Molten Metal Processing Committee, the Gray Iron Research Com- with deleterious trace elements. Subcritical heating is used for both. Related Categories Screw Machine Parts Gray Iron Castings Investment Castings Forges & Foundries Iron Castings Forgings Iron Foundries Die Castings Metal Processes Ductile Iron Casting. : Cast iron is a A. , all of them can be used and interchangeable. In cast iron …cast iron is either so-called gray iron or white iron, the colours shown by fracture. It contains: chemical composition of grey cast iron. malleable material C. Aluminium & Heavy Metal: sheets tubes pipes drawing profiles. This silicon content only converts the. Ductile iron has higher tensile strength and toughness similiar to steel. %) of Mg to gray iron changes the flake C microstructure to spheroidal that increases (by factor ~20) steel ductility 4. Gray iron exhibits these behaviors more markedly than nodular iron. and suited for castings requiring high strength and wear resistance as well as pressure containing. tough material Mechanics Preventive Maintenance Engineering Question added by Ridha SAIDANI , Preventive Maintenance Manager , SOMIPHOS / Mining Complex of DJEBEL ONK. Malleable cast iron - cast irons produced by heat treatment of white cast irons and consisting of ferrite and particles of free graphite. Differences in the amount of carbon present and in the form in which it occurs are responsible for some differences in the corrosion behavior of these materials. Ferritic ductile iron can be produced “as-cast” but may be given an annealing heat treatment to assure maximum ductility and low temperature toughness. Ductile materials show longer life when subjected to fatigue loading. The most critical range is 0. Gray Iron typically runs 3. Nodular graphite cast iron QT450-10 is a nodular graphite cast iron with high toughness and plasticity. Get Contact details & address of companies manufacturing and supplying Ductile Iron Pipe across India. They have a very high 95% of their average alloy composition in common. * 2 Ductile iron was invented by H. high ductility and tensile strength. Cast Iron – is a hard relatively brittle allow of iron and carbon and can be easily cast in a mold and contains a higher proportion of carbon than steel and is either grey or white in color. Cast iron is great for engine blocks and anything that will be cast into irregular shapes, but cast iron tends to be brittle and can crack or break. }, abstractNote = {This report presents recommendations for establishing design and acceptance criteria for the ductile cast iron to be used for fabricating spent-fuel shipping casks. Adding magnesium causes the graphite to occur as spheroids rather than as individual flakes, giving Ductile Iron a much higher strength-to-weight ratio. Malleable cast iron can be heat treated to the same microstructures as ductile cast irons. 5 % molybdenum to ferritic Ductile Iron produces significant increases in creep and stress rupture strengths, resulting in high temperature properties that are comparable to those of a cast steel containing 0. Ductile iron pipe is a direct development of earlier cast iron pipe which it has superseded. research laboratory developed ductile iron, an even stronger and more flexible metal. Customized Superior Quality Cast Iron Park Bench Legs for Outdoor Street Garden Furniture. Colour micrographs are produced by first etching with 2% nital, followed by open air heat treatment of the metallographic sample at 270 o C for 3 h. Hardened ductile iron is a great choice for serious street engines that do not demand the high temperature tolerance compatibility of a race engine. Grey cast iron is brittle at any temperature and should not be used at low temperature. Its composition of sharp-edged graphite flakes creates stress concentrations that override the ductility of the iron. On the other hand cast iron is a brittle material, […]. With a complete pattern shop and 3D CAD design capabilities OK Foundry can develop a sand cast solution for most applications in gray or ductile iron. This quality, very important for certain applications, is achieved by careful additions of manganese and tiny amounts of magnesium or cerium in the melt. Our ability to handle many diverse pattern sizes is our specialty. In ductile iron the graphite forms into spherical nodules rather than flakes, thus inhibiting the creation of cracks and providing the enhanced ductility that gives the alloy its name. Figure 5: Influence of Aluminium Content on Surface Tension and Pinhole Susceptibility of Grey and Ductile Irons. Individual examples of ductile iron failures will also be examined. Size range 150-3,000 lbs. Companies around the world make fittings and other such equipment out of malleable iron, which is a testament to how well it still works 70+ years after the advent of ductile iron. whether a locking device is required), but not the fitness for the purpose of the casting, which is to cover and/or give access to ground or sub-surface systems. wide available from stock. cast irons is excellent and ductile iron is better than gray cast iron and the reduction in corrosion rates for both materials is related to barrier layer deposited on the surface which is more uniform on ductile iron surface. Austempered Ductile Cast Iron. is a reliable, experienced. The making of cast iron is principally, liquefa… Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Performance Castings Gray and Ductile Iron Castings. Ductile iron contains the same ingredients as cast iron. Ductile iron pipe is stronger and easier to tap,. But in the waterworks industry, Class 125 and Class 250 apply to grey iron fl anges, while Class 150 and Class 300 apply to ductile iron, steel and stainless steel (ASME B16. A number of photographs of pipes are presented in order to assist practitioners in identify-ing similar problems in other water systems. whether a locking device is required), but not the fitness for the purpose of the casting, which is to cover and/or give access to ground or sub-surface systems. Due to the continuity of the graphite through the structure, and the properties of graphite, gray iron is soft, low strength, but brittle and is easily machined. When cast iron is fatigue tested, cracks originate at these stress concentrations. , #663 Waghavade Road, Macche, Belgaum - 590 008, Karnataka, India. Both ASTM A36 carbon steel and ductile cast iron are iron alloys. EFFECT OF TEMPERING TEMPERATURE AND TIME ON STRENGTH AND HARDNESS OF DUCTILE CAST IRON This thesis Submitted In Partial Fulfilment of The requirement For the Degree of Master of Technology ( DUAL DEGREE) In Metallurgical and Materials Engineering By RAVINDRA KUMAR (Roll no. Benefits of Ductile Iron are the following: Excellent tensile strength. However, in the most international standards, cast iron hardness is not a necessary inspection specification. Ductile iron also dissipates (gets rid of) heat very well and can be machined fairly easily, though ductile iron is harder to work with than regular gray cast iron. The electrochemical tests involve measurement of corrosion potential in. Elastomeric cyclic olefin copolymers IC in certain carbon and alloy steels shows an abrupt change in a narrow temperature range which is called the ductile-brittle transition temperature. Modified cast Aluminium Modified aluminium-silicon casting alloy Unmodified cast Aluminium unmodified aluminium-silicon casting alloy. Price and Lead Time on Request. Yuan Jun Fong Casting Co. It contains: chemical composition of grey cast iron. Ductile Iron tensile strength is 60K vs Cast Iron at 31K. While most varieties of cast iron are comparatively brittle, ductile iron castings are much more ductile due to the inclusion of nodular graphite. 0% carbon, 1 to 3% silicon, and the remainder is pure iron. In grey iron, the graphite takes on sharp flake shapes which create points of high stress within the metal, making the material brittle and easily fractured. Ductile iron is highly ductile whereas cast iron is less ductile. Investment Foam Ductile Cast Iron Casting Estimates/Help (self. The fatigue strength of Ductile Iron is frequency sensitive, and test frequencies should not exceed those encountered when the component is in service. A good finished product begins with the material you decide to machine it from. Note that cementite (Fe. The graphite flakes in gray cast iron makes fractures more likely while the spherical nodules in ductile iron actually help to keep the iron together. Whilst TT7015 grade’s superior wear and chipping resistance, delivers excellent performance in general machining of gray and ductile cast iron in extreme interrupted machining and non-homogeneous workpiece surface conditions. 12% P for gray irons and 0. Moreover, you don't have to be overly choosy about your drill bit. Recent development of ductile cast iron production technology in China *Cai Qizhou and Wei Bokang (State Key Lab of Material Processing and Dies & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China) Abstract: Recent progress in the production and technology of ductile cast iron castings in China is reviewed. Gray cast irons are mechanically weak and brittle due to sharp tips and brittleness of graphite flakes which act as stress concentration points and produce "notch-effect". Home > Tips and Facts > Understanding Cast Irons > Ductile Iron. Grey cast iron is no longer recommended for use in sulphuric acid plants. Fractured gray cast iron nut cracker demonstrating a gray. wide available from stock. Key Areas Covered. Description: Flomatic® Corporation manufactures Cast Iron Check Valves with high strength epoxy coated ductile iron body, disc and follower with threaded female x female connection. The gray iron has many graphite flakes. Ductile cast iron dampens vibration and sound much better than steel would making ductile iron a good match for use on large machines. For best results, these types of cast irons should be welded in the annealed condition. But in the waterworks industry, Class 125 and Class 250 apply to grey iron fl anges, while Class 150 and Class 300 apply to ductile iron, steel and stainless steel (ASME B16. Brittle failure occurs suddenly and without warning. Pressure containing materials for low temperature service must be ductile. * 2 Ductile iron was invented by H. Generally, gears are fixed to their shafts by means of a key. Hindmurti Industries is a premium foundry in North India engaged in manufacturing of Gray Iron & Ductile Iron Castings. However, the iron castings are so fluid that it is possible to fill molds with the liquid iron itself, so it is possible to easily get complex shapes. 5 per cent vanadium in annealed ferritic ductile iron produces a marked increase in tensile strength while further increases can be obtained by adding up to 2 per cent nickel to the vanadium iron. Cangzhou Yongxing Foundry Co. There are several. +86-186 6970 3621 [email protected] The foundry is an approximately two hour drive from the city and port of Shanghai.