Stainless Steel Chains: Standard: US type ASTM machine chain, ASTM coil chain, ASTM grade 30, 43, 70 chain ... so on Stainless Steel Chains:1) Standard: US type ASTM machine chain, ASTM coil chain, ASTM grade 30, 43, 70 chain ... chain, Norwegian standard link chain, twist chain, single jack chain, double loop chain, knotted chain, SASH chain 2) Material: stainless steel, carbon ...