Casting Material CF8M
ASTM A351 Standard Specification for Castings, Austenitic, for Pressure-Containing Parts: Carbon: 0.08 max Manganese: 1.50 max Silicon: 1.50 max ... CF8M is defined in ASMT A351, ASMT A743 and ASTM A744, which is for casting purpose only. SS316 is defined in ASTM A240 and ASTM A276, it's for plate, sheet, strip or stainless steel bars.