Class 150 Malleable Iron threaded fittings have no pressure class markings. White-heart malleable cast iron obtained when the white cast iron is annealed at oxidizing atmosphere to remove carbon from the surface. However, according to the Kirkpatrick foundry, malleable iron is the best choice when you want to cast thin sections or plates. A novel powder grade has been developed to compete with ductile iron casting materials. Malleable iron, like Ductile iron exhibits excellent elongation properties. The iron castings can be of the ferritic, austenitic, gray, cupola, pearlitic, ductile, or malleable types. Fig 1 Microstructure of malleable iron Chemical composition of malleable cast iron The chemical composition of malleable cast iron generally is in the ranges as given in the Tab 1. Malleable iron is a nodular iron very similar in structure to some grades of Ductile iron. MIP-A achieves almost 100% densification through liquid phase sintering with a sintered density of 7.5 g/cm³. Ductile iron has a clear advantage where low solidification shrinkage is needed to avoid hot tears or where the section is too thick to permit solidification as white iron (Solidification as white iron throughout a section is essential to the production of malleable iron). Grainger's got your back. Searching for Malleable Iron Pipe Hangers and Clamps? Hope this grade comparison could be helpful to iron foundries in China. Malleable cast iron is like steel than cast iron. The percentage of carbon and silicon should be so selected that it can promote the development of free carbon when these castings are annealed. Automotive Malleable Iron Castings(Cancelled Apr 2003) J158_200304 This standard covers the hardness and microstructural requirements for malleable iron castings - ferritic, pearlitic, tempered pearlitic, and tempered martensitic grades used in automotive and allied industries. The white cast iron is packed in an iron or steel boxes and surrounded by a decarburizing agent (a mixture of new and used hematite ore). It is costly than grey cast iron and cheaper than softer steel. Ductile iron has a higher "yield strength" than malleable iron, meaning it can bear greater loads and higher temperatures. See the table below for pressure and temperature rating of malleable iron fitting; Malleable iron fittings, also called black iron fittings, are available up to 6 inch nominal pipe size, though they are more Material grade equivalent table of cast iron. Malleable cast iron also contains sometimes small amounts of chromium (0.01 % to 0.03 %), boron (0.0020 %), copper (up to 1.0 %), nickel (0.5 % to 0.8 %), and molybdenum (0.35 % to … By contrast, malleable iron elongates by only 10 percent. The end-products to which these materials are produced from include valves, flanges, pipe fittings, plumbing systems, sanitary pipes, and pressure vessels. 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 is the material grade equivalent table for various cast irons, including grey iron, malleable iron and nodular graphite iron. Easy online ordering for the ones who get it done along with 24/7 customer service, free technical support & … Properties of malleable cast iron.

Malleable iron pipe fitting is not good for welding (if you ever need to weld something to it).
The castings become malleable like white heart cast iron. This new malleable iron powder, MIP, is an irongraphite composite powder in which the carbon is dispersed as - graphite nodules in a ferritic matrix. In other words, it can be bent and is also easily machinable like mild steel. Often considered to be an “old” or obsolete iron, malleable iron is still made around the world.