... machinery, agricultural equipment,electric appliance, electronic fitting, military equipment, etc3. Standard: the dimension tolerance of the product may reach CT3-CT6class4 ... steel, carbon steel, alloy steel, heat resistant steel etc.4.Standard: ANSI, ASTM, JIS, DIN, GBPROCESSMATERIALSTANDARDSANDCASTINGGreen SandGrey Iron, Ductile Iron, Malleable ...