... Material: 25Mnv, 20Mn2, Q235 2.Finish: blackened, zinc-plated, HDG 3.Size: 4mm-32mm alloy steel chains Introduction:We are ... specialized in supplying high strength chain, alloy steel hoist chain, transport chain, proof coil link chain and ... , black painted etc.3) Material: 20Mn2, 25Mnv, Q235 (alloy steel chains, mild steel chains, welded lashing chains, transport chains, lifting chains, ...