|   SAE J431 automotive gray cast iron, SAE grade G1800  Subcategory: Gray Cast Iron; Metal Key Words: UNS F10004, ferritic, pearlitic, soft iron castings Material Notes: If Carbon or Silicon is on the high % range end, the other should be on the low % end. Properties determined from as-cast test bar 30.5 mm diameter. Ferritic-pearlitic microstructure. Applications include miscellaneous soft iron castings (as cast or annealed) in which strength is not a primary consideration. 780 kg minimum transverse load, 3.6 mm minimum deflection.
 
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    | DensityHardness, BrinellHardness, KnoopHardness, VickersTensile Strength, Ultimate
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