Cast Iron Types | Metal Casting Resources

Decatur Foundry began producing gray iron engineered castings using the air set molding in lower volumes and short run, highly-cored castings. Typical casting designs included flywheel housings, boiler sections and pump housings. 1980s We began producing ductile iron along with gray iron for electric motors, pumps and valves, focusing on ...

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Quality Castings Inspection: Life of a Casting | Reliance ...

Gray iron for automotive castings, in which gray iron castings meet various strength levels, will be specified by a minimum Brinell hardness. There have been numerous papers dealing with the subject of the correlation of Brinell hardness with tensile strength.

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Cast iron

Apr 01, 2008· Introduction. Cast iron is still an essential engineering material which has high cost efficiency, outstanding castability and machinability, good thermal conductivity, and damping capacity1, 2.Pressure tightness is one of the important factors for gray iron castings like cylinder liners, cylinder blocks, and exhaust valve housings used in pressure applications.

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What is Grey Cast Iron?

Dec 23, 2016· Casting since about 4000 BC… Ancient Greece; bronze statue casting circa 450BC Iron works in early Europe, e.g. cast iron cannons from England circa 1543 7. Casting Process • Casting process is one of the earliest metal shaping techniques known to …

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Causes of Shrinkage in Casting Process and Solutions

Fig. 3 is a similar microphotograph at 100 diameters, without etching, of a sample of gray cast iron made by the process of the present invention, using a .05% cupric fluoride addition, and showing the short separated graphite flakes. Example I According to the first example, five pounds of cupric fluoride (CuF22H20) are placed in an iron ...

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Heat Treating of Gray Irons: Part One :: Total Materia Article

casting. However, this process can only be used in castings made of ferromagnetic metal that can create a magnetic field—metals like iron, cobalt, nickel, and some of their alloys. The casting is magnetized, usually with electromagnets, to start the test. A …

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Casting process

May 12, 2018· The casting process involves ductile iron (iron alloys having controlled microstructures) and melting process, plus the use of one of the elements (like magnesium, yttrium or cerium) making it quite ductile. Ductile iron castings, when compared to grey iron castings, have a greater tensile strength and increased ductility.

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Melting Iron the Waupaca Way | Waupaca Foundry

Jun 15, 2017· Grey Iron Casting Process June 15, 2017. Several molding processes are used to produce gray iron castings. Some of these have a marked influence on the structure and properties of the resulting casting. The selection of a particular process depends on a number of factors, and the design of the casting has much to do with it. The processes using ...

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Melting Iron the Waupaca Way | Waupaca Foundry

Jun 18, 2015· There are many grades of gray iron as per the ASTM A48 standard. While gray iron does not have a measurable yield strength, the range for tensile strength is 20,000 psi – 60,000 psi. Impact – Ductile iron has a greater resistance to impacts, and is able to resist a minimum of 7 foot pounds of impact (versus 2 pounds of impact for gray iron).

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Grey Iron Casting Process

Cast iron is a group of iron-carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its colour 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 …

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Gray & Ductile Iron Castings

This is the process that produces gray cast iron. Faster solidification rates produce a pearlitic or ferritic matrix, which are cementite, or white iron. Similar Casting Processes. In 1943, Keith Mills discovered the process of ductile iron casting. Ductile iron is a group of iron alloys with controlled microstructures.

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Cast Iron Types | Metal Casting Resources

Feb 19, 2021· Post cast repairs. A process called vacuum impregnation is sometimes used to fix porosity problems in castings. Here sealants are introduced into the casting by pressure or vacuum to eliminate any leaks due to porosity that runs through a casting.

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The Differences Between Ductile Iron and Gray Iron Castings

The iron castings can be of the ferritic, austenitic, gray, cupola, pearlitic, ductile, or malleable types. The end-products to which these materials are produced from include valves, flanges, pipe fittings, plumbing systems, sanitary pipes, and pressure vessels.

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12.10 Gray Iron Foundries

Gray iron, or grey cast iron, is a type of cast iron that has a graphitic microstructure. It is named after the gray color of the fracture it forms, which is due to the presence of graphite. It is the most common cast iron and the most widely used cast material based on weight.

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Versa

Why is Grey Cast Iron So Popular? Properties and Uses

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Casting Process of Grey Iron Belt Pulley | Galen Wang's Blog

Gray iron, or grey cast iron, is a type of cast iron that has a graphitic microstructure. It is named after the gray color of the fracture it forms, which is due to the presence of graphite. It is the most common cast iron and the most widely used cast material based on weight.

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Gray iron

Melting Iron At waupaca foundry The iron melting process begins at Waupaca Foundry by selecting from a variety of material solutions to meet each gray iron and ductile iron castings unique specification. Large furnaces melt the iron and stay at temperatures ranging 2,600 to 2,800 degrees Fahrenheit. Computerized systems constantly monitor temperature.

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12.10 Gray Iron Foundries

Ordinary gray cast iron is characterized by a distribution of random lamellae of gra-phite in the metal matrix, while in nodular cast iron the gra-phite has the form of small spheroids. With respect to lamel-lae, the spheroids create fewer and less severe discontinuities in the metal matrix thus producing a stronger, more ductile cast material ...

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Processes involved in the manufacture of Grey Iron Castings

Mar 25, 2011· Grey iron belt pulley is a kind of iron casting with very high technical requirements. We talked about its casting process by an example of material ASTM A48 CLASS 35, weight 1500 kg and outside diameter 1100mm. Normally, the belt pulley requires machining to all surfaces, and no defects on the surfaces of grooves and…

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Iron processing | Britannica

Jan 13, 2021· Gray cast iron is the most common type of cast iron welded, and should be the only cast iron you attempt to fuse unless you're experienced with casting or welding it. Having someone experienced assist you is another good option. Choose the Welding Process

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