G80 lifting chain: 1. Grade: G80 2. Material: alloy steel 20Mn2 3. Surface: self colored,painted black and galvanized etc. G80 lifting chain, heaty duty lift chain1. G80 lifting chain, heaty duty lift chain Introduction:1. 80Grade, High intensity chain, breaking load>800Mpa2. National standard: JB/T8108.1-19993. Material: High quality mild alloy steel.4. The tensile extension under breaking load ...