Grade 80 chain is rugged, high strength, low weight, and versatile. Grade 80 chain assembly is made from alloy steel that has been specially treated for its exceptional qualities. The chain is quenched before the proof test. Such results in as twice large ultimate tensile strength as that of normal steel chain. All OSHA guideline for tensile strength is passed with Towing Parts Outlet Grade 80 Chain. NACM and ASTM Standards are covered as well.