‚ž So, it is mainly used to produce the abrasion resistant parts for power and agricultural machinery. - Low thermal expansion. Ductile iron has some good mechanical properties than other cast irons. It . malleable iron: [noun] cast iron containing usually from 2 to 3 percent carbon and 1.5 to 0.8 percent silicon and produced by annealing white cast iron of this composition in order to convert hard brittle cementite to graphite in nodular form so that the material will have greater ductility than white iron or ordinary gray iron containing . These values are comparable to the pearlitic malleable cast iron class 80002 and the ductile iron grade 100-70-03. Galvanized pipe fittings should not be used with gas applications. This corresponds to the maximum stress that can be sustained by a structure in tension. Iron metal is greyish in appearance, and is very ductile and malleable. Published May 2000. Chemical Properties The designation according to ISO 5922 (1981) of malleable cast iron consists of one letter designating the type of iron, two figures designating the tensile strength and two figures designating the minimum elongation. Some countermeasures can be applied to enhance . Generally, the martensitic grades are grouped with the pearlitic materials; they might be thought of as extensions (at the higher strength end of the range) of pearlitic malleable iron. Malleable cast iron applications. Malleable iron is a good choice for small castings or castings with thin cross sections (less than 0.25 inch, 6.35 mm). Malleability. 1/2'' Malleable Iron Beam Clamp: 1/2'' 1/2'' 10: Related Products. White core ductile cast iron is rarely used due to its long elongation process. ƒ˜ This is caused by the strength in casting. THREADING All fittings shall be threaded with American National Standard Pipe Threads (ANSI/ASME B1.20.1) and shall have taper threads, except wrought couplings and wrought caps in sizes 1/8, 1/4, 3/8 and 1/2, which may have This specification also lists a grade 35018, but this is no longer in common production. The Ultimate Tensile Strength of Malleable Cast Iron constant displays the value of ultimate tensile strength for malleable cast iron ASTM A220 (580 MPa).. 1/2" Pipe Fitting Cap, Home TZH 20 Pack 1/2" Grey Malleable Iron Cast Pipe Caps for Steam-punk Vintage Shelf Bracket DIY Plumbing Pipe Decor Furniture (20, 1/2") Visit the Home TZH Store. Material's ability to deform under compression without rupturing Tensile strength. The main advantage of using galvanized fittings is their superior rust resistance when compared to black and copper fittings. Hardness requirements Characteristics of carbon steel pipe The amount of carbon contained in steel determines its properties. Ductile Cast iron . Usually the real tensile strength is higher than 300, it may reach to 330 and the elongation may reach to 8%. The capacity of a material to withstand loads tending to elongate is known as ultimate tensile strength (UTS). Ultimate tensile strength of malleable cast iron - ASTM A220 is 580 MPa. Malleable Iron Pipe Fittings | McMaster-Carr Pipe Size Thread Type NPT NPSC BSPT NPTF BSPP NPSL Metric UN/UNF (SAE Straight) Type Material Iron Steel Brass Copper Finish Black Coated Galvanized Epoxy Coated Enamel Coated Shape System of Measurement Inch Metric Length 3/16" 1/4" 0.28" 9/32" 19/64" 0.31" 5/16" 0.34" 11/32" 3/8" 0.38" 13/32" 0.42" Current edition approved May. Such iron is said to have a 'mottled' appearance. White Heart Malleable Iron are stronger and have more plasticity than black heart malleable iron: White Heart cast iron: Tensile strength is 350-450 Mpa (Hardness is approximately 220 HB) Black Heart cast iron: Tensile strength is 300-350 Mpa (Hardness is approximately 170-190 HB) So . 35018, Supplies and solutions for every industry, plus easy ordering, fast delivery and 24/7 customer support. Fabrication and other . - Leak tightness and resistance for . It is used for parts with low load and high impact and vibration. Fig. It is used to make machine parts for which steel forgings will be expensive and must have a fair degree of mental accuracy. This made it much easier to work with and less likely to fail. Malleable iron has properties that are very similar to mild steel. Examples of malleable metals are gold, iron, aluminum, copper, silver, and lead. Steel is unquestionably stronger than iron. The strength and ductility of malleable irons would overlap the as-cast properties of ductile iron shown in Fig. Like ductile cast iron the matrix is the continuous phase and so the final structure will have similar properties to ductile cast iron, excellent strength, ductility, and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and . Ductile Cast Iron Black iron pipe is used to transport natural and . Malleable Iron. They are threaded according to EN 10226-1. Process Performance Malleable cast iron is an iron alloy containing a small percentage of carbon (typically between 2 and 4 percent). This gives the iron more strength while allowing it to keep ductility. . Tensile strength is how much a sample can be stretched before it significantly deforms. Malleable iron is a good choice for small castings or castings with thin cross sections (less than 0.25 inch, 6.35 mm). Malleable cast iron fittings are designed according to the EN 10242 standard and available in black and hot-dip galvanized versions. They are typically found in steel-to-steel . Strength. 5 shows that axial fatigue strength is very sensitive to both sintered density level and the number of graphite flakes/mm 2 having a dimension . Composition The annealing process of malleable iron causes it to form small particles of carbon that are shaped irregularly. the american national standard specifications for malleable iron castings ansi/astm a47-77 specifies the following grades and their properties: no. London: . Malleable iron is relatively easy to machine, and it is shock resistant. Manchester: 0161 368 4545. 5. Originally published as A 197 - 36 T. Malleable cast iron is more suitable for working at low temperatures than ball milled cast iron. Shawston provide a range of Malleable Iron and Mild Steel Fittings for Mechanical and Fire sectors, next day delivery via nationwide depots. Our Malleable Iron Long Two Socket Cross is manufactured according to the requirements of EN-GJMB-300-6 with tensile strength min 300 N/mm2 and elongation min 6%. 2) View More. In addition, malleable cast iron has excellent surface hardening properties. Cast iron is ferrous alloy having more than 2% carbon in it. The material is brittle at room temperature but has a low melting point and thus has excellent castability. Comparing with cast steel, malleable cast iron has better abrasive resistance and shock absorption. Austempered ductile iron (ADI) provides twice the strength of conventional ductile iron at a given level of ductility. Thus a complete designation of a malleable cast iron could be EN-GJMW-350-4 this is a whiteheart malleable cast iron with a minimum tensile strength of 350 N/mm2 on a 12 mm diameter test piece, and a minimum elongation of 4%. . The material is formed when cast iron is heated to high temperatures, typically 1,700 degrees Fahrenheit, and then left to cool very slowly. Malleable iron is a form of . The strength of a material is its ability to withstand an applied load without failure or plastic deformation. Pearlitic malleable irons would be stronger but . The material ensures resistance against mechanical stress and long durability. For Use With. It has excellent strength and toughness. Fracture toughness values in the range 60-70 MPa m 1/2 have been reported ( Bradley and Srinivasan 1990) for ferritic grades, values somewhat less than for a similar ferritic ductile iron. Ductile cast iron Tapped Threads Back and Bottom, High Strength Iron, Case Hardened Steel Bolt. An extensive investigation is made between ductile iron, air quenched-and oil quenched malleable iron based on the properties of more then 350 test bars produced under the same conditions. Malleable iron can also . Send your message to us: This class 150 fitting meets standards ASTM A-197, ASME B 1.20.1, and ASME B 16.3 for quality assurance. It has a tensile strength of 350-450 Mpa, and hardness of approximately 220 HB. Malleable iron castings for automobiles (ASTM A602-87) They are used for automotive and the same industrial products with the same grade of ferrite, pearlite, tempered pearlite and tempered martensite. It is resistant to scuffing and wear. For example, its highest tensile strength could reach 900 Mpa, the largest elongation could reach 18%, moreover, its has good impact property, even good impact property in low temperature condition. As a result of its good tensile strength and ductility, malleable cast iron is used for electrical fittings and equipment, hand tools, pipe fittings, washers, brackets, farm equipment, mining hardware, and machine parts. It dissolves readily in dilute acids, and is chemically active. Relatively high strength and toughness of white malleable cast iron allows products to be used in applications with high dynamic and impact stress. This is because it's a more dense material. 2. Malleable iron was the first iteration that could be hammered and bent into shape. The ultimate tensile strength is the maximum on the engineering stress-strain curve. Our malleable iron pipe fittings can be used in a wide variety of applications involving steam, air, water, gas, oil, and other fluids. 3/8''-16 x 10' Threaded Rod . Gold and silver are highly malleable. Malleable cast iron has a range of features, such as strength, . The silicon pushes part of the carbon out of the solution, forming graphite flakes. . Malleable iron has properties that are very similar to mild steel. Malleable Iron Pipe Fittings, Black Pipe Fittings from Quality Pipe. MALLEABLE CAST IRON (CAST WHITE IRON, ANNEALED) Castability Standard castability: much easier than steel casting Yield Strength 50k psi 33k psi Elongation % 18 0.5 0 12 Tensile Strength 72k psi 40-50 k psi 25 k psi 52 k psi Hardness [Brinell] 130-217 260 450 130 Corrosion Resistance The last two numbers in the designation list the minimum elongation or ductility of the iron sample. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and fatigue. Chemical composition, organization and properties of malleable cast iron 1) The chemical composition of malleable cast iron is: wC = 2.2% to 2.8%, wSi = 1.0% to 1.8%, wMn = 0.3% to 0.8%, wS 0.2%, wP 0.1%. Ultimate tensile strength of malleable cast iron - ASTM A220 is 580 MPa. yield strength, that stress producing an extension under load of 1 This specication is under the jurisdiction of ASTM Committee A-4 on Iron Castings and is the direct responsibility of Subcommittee A04.02 on Malleable Iron Castings. ADI can have strength in excess of 230 ksi (1,586 MPa); however, its modulus is 20% lower than steel with a comparable strength. UL & CSA Listed. 2.1 Malleable iron features. malleable cast iron has higher strength, stability and scrape- resistance. Steel has entirely replaced iron in the creation of houses, buildings, railways, and many other objects. Scientists believe that the Earth's core is made up of about 90% iron. The tensile test and hardness requirements of typical parts are as follows: 3. The ultimate tensile strength is the maximum on the engineering stress-strain curve. The tensile properties set apart malleable iron from the others in cast iron category. Malleable iron is typically used for small castings requiring good tensile strength and the ability to flex without breaking (ductility). Pearlitic malleable cast iron has higher strength, hardness and wear resistance. Structural washers are thick and heavy-duty for mechanical and structural use with high-strength fasteners. Good weldability of material EN-GJMW-360-12W (GTW-S38) opens a possibility of use in sophisticated welded constructions. The difference between malleable and ductile iron was toted to be strength. Yes. With their extensive history and tradition, malleable cast iron fittings are the most . There should be a link between test bar . There are three basic malleable cast irons are recognised. The strength of a material is its ability to withstand an applied load without failure or plastic deformation. Malleable iron contains more blunt boundaries opposed to flakes, which eliminates the stress concentration problems that grey cast iron can cause. The alloy constituents affect its color when fractured: white cast iron has carbide impurities which allow cracks to pass straight through, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the . 10, 2000. Black pipe fittings (black malleable iron fittings) are used to make connections to black iron pipe. The main mining areas for iron are China, Australia, Brazil, Russia, and Ukraine. The greatest longitudinal stress a material can bear without tearing apart Fatigue strength. they are blackheart malleable iron whiteheart malleable iron pearlitic malleable iron Used to make Railway rolling stock, brake supports, door hinges, locks. 32520, having a minimum tensile strength of 50,000 psi (345 mpa), a minimum yield strength of 32,500 psi (224 mpa), and a minimum elongation in 2 inches (50.8 mm) of 10 percent; and no. Ultimate tensile strength is often shortened to "tensile strength" or even to "the ultimate." Compacted Graphite Iron (CGI)In CGI, graphite locally occurs as intercon-nected blunt akes. These properties make it useful for a range of commercial purposes. Ultimate tensile strength is often shortened to "tensile strength" or even to "the ultimate." White core ductile cast iron. Moreover, after suitable heat treatment, its physical properties could be . Industry Standard. There are many types of malleable iron fittings, and the appropriate shape and size should be selected according to the needs of the pipe during installation. FENW38114. Steel is more lightweight than iron. - Good resistance for abrasion. first annealing above 900 o C and second annealing below this temperature. History Aside from these properties and durability, EE white heart malleable iron fittings also has the following characteristics: - Excellent strength and plasticity. Malleable iron starts out as white iron casting but is then treated at a heat of roughly 1,650F, 900C. 3/8'' X 1-1/4'' Fender Washer Add to submittal. View More Conduit body-LB Conduit body-LB PEARLITIC MALLEABLE IRON is a high strength cast iron recommended for dependable service, strength and machinability in highly stressed parts at work in mobile and stationary mechanisms. . When it comes to Malleable Iron Structural Washers, you can count on Grainger. Ultimate tensile strength is often shortened to "tensile strength" or even to "the ultimate." Malleable iron possesses considerable ductility and toughness because of its combination of nodular graphite and a low-carbon metallic matrix. They are used to make parts where forging is expensive like, brake supports, hubs of wagon . Exposed to a strong magnetic field, any piece of iron can be magnetized. Mechanical Properties The ratio of yield strength to tensile strength of malleable cast iron is close to that of ball milled cast iron, but is about 60% ~ 80% higher than that of carbon steel. Properties of Malleable Cast Iron 1. 4 Tensile properties of specimens made with MIP vs sintering temperature [1] Fig. When a piece of hot iron is hammered it takes the shape of a sheet. The malleable cast iron is ductile and may be bent without breaking or fracturing the section. The ultimate tensile strength is the maximum on the engineering stress-strain curve. The following two numbers list the tensile strength of the iron. Comparing with the gray cast iron, malleable cast iron has better strength and ductility, especially better impact resistance in low temperatures. This changes the carbon in the iron carbide of the cast iron into graphite and ferrite plus carbon. HIGH QUALITY MATERIAL - This pipe cap is mainly composed of iron, carbon and silicon alloy composition, with high strength, good toughness, plasticity and . In general, malleable iron is very good for applications requiring good tensile strength and the ability to flex without breaking (ductility). Its usefulness derives from its relatively low melting temperature. Ultimate tensile strength of malleable cast iron - ASTM A220 is 580 MPa. The highest stress that a material can withstand for a given number of cycles without breaking Melting Point. Our Production Processing for malleable pipe fittings We buy and use dense ,high strength ,nonporous iron and steel scrap as raw material .Because that is basic point on excellent malleable pipe fittings Thread processed is exactly based on ASME EN BS DIN standard requirements, The white cast iron is heat-treated (Annealing) at about 950 Degree Celsius for 24 or 48 hrs and then allow to cool for 24 hrs or 48 hrs. A common classification for malleable cast iron is ASTM A47. Air-quenched and pearlitic malleable iron has a matrix consisting of a ferrite ring around the temper carbon (which produces a lower yield strength) and partially broken lamely pearlite. As for grey irons, the specification is not concerned with the composition of the iron. One of iron's identifying characteristics is that it is strongly magnetic. RoHS Compliant. Cast iron is a class of iron-carbon alloys with a carbon content more than 2%. This corresponds to the maximum stress that can be sustained by a structure in tension. ASTM Specification A-47-77 is for ferritic malleable iron and requires a minimum of 32,000 psi (220 MPa) yield strength, 50,000 psi (345 MPa) tensile strength, and 10% elongation in two inches (50 mm) for grade 32510. Malleable cast iron has high tensile strength than the grey cast iron and having excellent machining qualities. The castings should be heat-treated. It begins to rust in damp air and at elevated temperatures, but not in dry air. Pearlitic malleable irons would be stronger but less ductile than ferritic malleable cast irons for the same reasons as for ductile iron. . Malleable iron starts out as white iron casting but is then treated at a heat of roughly 1,650F, 900C. The remaining lamellar pearlite reduces machinability to a limit of 240 HB. Abstract PEARLITIC MALLEABLE IRON is a high strength cast iron recommended for dependable service, strength and machinability in highly stressed parts at work in mobile and stationary mechanisms. Therefore, it is mainly used to produce wear-resistant parts for power machinery and agricultural machinery. Metals are described as malleable (can be beaten into sheets) and ductile (can be pulled out into wires). This process of malleableization is performed in two annealing cycles i.e. Class 150 Malleable Iron threaded fittings have no pressure class markings. In sharp . Malleable iron contains more blunt boundaries opposed to flakes, which eliminates the stress concentration problems that grey cast iron can cause. In 1943, however, ductile iron was developed. Black-hearted malleable cast iron has low strength, hardness, good plasticity and toughness. Malleable Cast Iron. It's also more malleable and stands up better to tensile stress. Why is iron malleable and ductile? This corresponds to the maximum stress that can be sustained by a structure in tension. Because of its high strength and hardness, pearlite matrix malleable cast iron is used for critical parts with high load, wear-resistance and specific toughness requirements. As a result of the graphite in malleable cast iron being in the form of flocs, it has a modest splitting impact on the matrix, but following high-temperature tempering, the material gains greater strength and plasticity and can be cut. Its tensile strength is higher than grey cast iron and has excellent machining qualities. The desired formation of temper carbon in malleable irons has two basic requirements. Cast Iron is a group of Iron - Carbon-Silicone materials with 1.8-4% of Carbon (C) and 1-3% of Silicon (Si) content. When stress is applied to such a casting in application, the fracture strength will be lower than expected for white iron. Design Strength Pressure-containing fittings including the component parts of unions shall be designed to withstand the design test pressures given in the table below . . Threaded Rod. It has High strength; Malleable cast iron; They are made malleable with the help of annealing. ROD38. Properties. 6. Malleable cast iron besides less sensitive to cracking has a range of features, such as higher values of tensile strength, rupture strength and elongation, and high resistance to wear and strong shock resistance. It has excellent tensile strength compared to grey cast iron, but its tensile strength is much lower than that of ductile iron. Other nodular irons produced with graphite in the spherical shape can be difficult to produce in these applications, due to the formation of carbides from the rapid cooling. The process of annealing takes almost 72 hours. Though it can have any % of carbon from 2% - 6.67%, but practically it is in between 2% - 4%. EE brand pipe fitings are made of White Heart Malleable Iron. The tensile strength of our products is 10% higher than the national standard, and the elongation is 33% higher than the national standard. Electrical fittings, hand tools, pipe fittings, washers, brackets, fence fittings, power line hardware, farm equipment,mining hardware, machine parts, are all typical applications.
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