steel flat bar,Sping steel,Standard: GB/T702, JIS G3101, JIS G3193 . machinery manufacturing, ship building etc Flat ... SS400, SS540, St37, St52., 60Si2MnStandard: GB/T702-2004, JIS G3101, JIS G3193Packing: In bundle, each bundle will be attached two metal ... : machinery manufacturing, shipbuilding, railway spare parts, Iron tower steel structure, boilers making ,etc.Advantage: stable spec & accurate ...