... Heat Treatment Commodity: Forged Steel Square BarSteel Grade: SAE 4140,4340,1045,8620,8640,1020,4320,52100,5135 AISI H11,H10,H13,D2 ... JIS, ASTM, AISI, BS, SAE, ISO, TOCT, GB, ABNTAvailable Size: Engineering steel: size 50×50mm-650×650mm.Tool, die & mold Steel: size 50×50mm ... . P.C.:100121Tel:010-51201667 Fax:51201677 steel stock alloy tool steel H13 SAE 4140,4340,1045,8620,8640,1020,4320,52100,5135