... NM450 NM500 2. Standard GB/T 24186-2009 3. Thickness 6-80mm .Wear resistant steelD6,1. ... 2.Mould Steel Cr12W,D6 ,1.2436 3.Direct sales from factory 4.Surface:black or ... high hardenability ,toughness,abrasion resistance3.COLD WORK TOOL STEEL ROUND BARHigh carbon and high chromium, ... stable, ledeburitic 12 % Cr alloyed cold work tool steel, non-deforming, better hardenability, higher cutting capacity ...