D3 Alloy Steel 1, Round/Plate/Square bar in ful size 2, Hardness: HRC=60, HBS<=370 3, ... 2008 certificated D3 Alloy Steel Round Bar1, Round/Plate/Square bar in ful size2, Hardness: HRC=60, HBS<=370 3, ISO ... /21200D3/T304031.2080X210Cr12SKD1 5. Applications: High stressed cutting and punching tools for thin sheetsDrawing and deep drawing toolsStone processing toolsKnives for ...