... customers' requirements Material:Q235,45#,40Cr,20# Standard:GB Cold Drawn Round BarMaterials: Q235, 45#, 40Cr, 20#Sizes: ... be customizedSpecificationsstainless steel round bar, hot rolled , cold drawn, polished procedure, various sizes,etc.,stainless steel round bar1. ... rolled into black surface--pickling into acid liquid--cold drawn--polished by automatically machine--cutting into pieces--checking ...