... 2004, Wanbao special steel has established QMS according to ISO9000, made quality policies and expanded business ... steel, square steel, die steel, spring steel, carbon tool steel, stainless steel, alloy steel, high speed steel, carbon structural steel, hot-rolled bar, hot-rolled wire rod, forged steel ... C.:100121Tel:010-51201667 Fax:51201677 steel stock alloy tool steel H13 SAE 4140,4340,1045,8620,8640, ...