... certificate 3) Round chain, high test, ASTM80 G80 alloy steel link chain 1) Standard: NACM84/902) Quality level: ISO 9000 certificate3 ... been sold well in the domestic market, but also exported to many regions including North America, South America, Europe, Africa, ... system" etc.Welcome to click our website http://www.sw-steelwirerope.com to learn more details about us. G80 alloy steel link chain