Grey Iron is also excellent in its ability to dampen vibrations making it ideal for machinery bases and as well as many housing applications. Ductile iron (SG Iron, Nodular Graphite Iron) 2 Normative references. Grey iron can also be heat treated which modifies the matrix giving the cast iron greater strength. Grade 30 cast iron is grey cast iron in the as-fabricated (no temper or treatment) condition. The mechanical properties of grey iron are controlled by the size and shape of the graphite flakes present in the microstructure and can be characterized according to the guidelines given by the ASTM. Current page last modified on 2020-05-30. ASTM Grade 20 or 150 (ISO 150, EN-JL 1020, F11401) Grey Cast Iron, ASTM Grade 25 or 175 (F11701) Grey Cast Iron, ASTM Grade 30 or 200 (ISO 200, EN-JL 1030, F12101) Grey Cast Iron, ASTM Grade 35 or 250 (ISO 250, EN-JL 1040, F12401) Grey Cast Iron, ASTM Grade 40 or 275 (F12801) Grey Cast Iron, ASTM Grade 45 or 300 (ISO 300, EN-JL 1050, F13101) Grey Cast Iron, ASTM Grade 50 or 350 (ISO 350, EN-JL 1060, F13501) Grey Cast Iron, ASTM Grade 55 or 375 (F13801) Grey Cast Iron, ASTM Grade 60 or 400 (F14101) Grey Cast Iron. The graphite structure also has great vibration dampening properties because the structure created by the graphite flakes helps cancel out vibrations. This page shows summary ranges across all of them. Gray Iron. pressure-containing parts suitable for low-temperature service. These cookies will be stored in your browser only with your consent. GB, ASTM, DIN, EN, JIS, UNI, NF, BS, IS, UNF, NBN, AS, SS, NS. In other words, the properties of the grey iron will change depending on what materials are melted together to pour into the mold as well as the process that is used for casting (it is primarily the cooling part of the process that defines the characteristics of the cast part versus other parts of the process.). class 20 grey iron has a minimum tensile strength of 20,000 psi (140 MPa)). All values are % weight. How does it compare to other metal alloys? This document does not cover technical delivery conditions for grey iron castings . The most common engineering alloy because of its relatively low cost and good machinability. To get grey iron above class 40 requires alloying to provide solid solution strengthening. Grey iron has graphite flakes entwined with the rest of the structure. This category only includes cookies that ensures basic functionalities and security features of the website.    The graph bars on the material properties cards further below compare grey cast iron to: cast irons (top), all iron alloys (middle), and the entire database (bottom). These cookies do not store any personal information. If you use a powerful microscope you can see the graphitic microstructure that makes grey iron so easily identifiable. [1] Santner, Joseph S. and Goodrich, George M., “Iron Alloys,” Casting Source Directory, 2006 (as accessed from alloys.pdf on 23 January 2016), Grey & ductile cast iron foundry producing high quality difficult castings with diversity in metals, sizes and quantities, Melt Supervisor; Furnace Tender; Maintenance Mechanic; and various hourly positions, Willman Industries Inc. • 338 South Main Street • Cedar Grove, WI 53013 • Other common uses for grey iron include: The popularity of grey cast iron components (gray iron castings) is because grey iron is one of the cheapest types of iron castings to produce. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. China Custom Metal Castings,  30 (53) at 212°F (100°C). For dated references, only the edition cited applies. (FLAKE The all data in this documents is referred to Chinese standard of GB/T 9439-1988.


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