Special SteelChina DIN X30wcrv53 (1.2567) AISI H21 1.2581 H21 JIS SKD5 Hot Work Alloy Tool Steel Plate Round Flat Bar, Find details about China Round Flat Bar, Steel Plate from DIN X30wcrv53 (1.2567) AISI H21 1.2581 H21 JIS SKD5 Hot Work Alloy Tool Steel Plate Round Flat Bar