wire rod:Cold heading wire rod ,Prestressed wire rod ,Welding wire rod ,Hard wire ,Ordinary wire rod Standard:GB AISI JIS DIN Wire RodAvailable ... -strength and low-relaxation per-stressed plain wire, indented wire, negative threaded wire, steel strand and rope, which are ... kinds of CO2 gas shielded welding wire, argon arc welding wire and submerged welding wire .Classification 4: Hard wireAvailable ...