AISI D2

D2 is an air-hardening, high carbon, high chromium tool steel with extremely high wear resisting properties. It is a very deep hardening steel and will be practically free from size change after proper treatment. The percentage of chromium gives it mild corrosion-resisting properties in the hardened condition.

TYPICALAPPLICATIONS

Large Blanking Dies, Forming Dies, Coining Dies, Slitting Cutters, Heading Tools, Long Punches, Forming Rolls, Edging Rolls; Master Tools, Beading Rolls, Intricate Punches, Extrusion Dies, Drawing Dies, Lamination Dies, Thread Rolling Dies, Shear Blades, Burnishing Tools, Gauges, Knurls, Wear Parts.

AISI D3

Oil-hardening D3 has outstanding resistance to deformation, distortion, and shrinkage in heat treatment. It holds size nearly as well as air-hardening steels. It is one of the hardest tool steels in existence and retains a keen edge longer than tools made from other carbon or even high-speed steels. The deep-hardening property of D3 assures maximum hardness penetration right through to the tool center. D3 has superior resistance to wear and abrasion imparted by a rich complex of hard, uniformly-dispersed chromium carbides in the matrix. It is unsurpassed for high production die work, where long life is a primary requirement and where a minimum of shock is encountered (as in forming operations). The extreme hardness and abrasion resistance of D3 makes it somewhat more difficult to machine than lower carbon grades, but its deep hardening capacity assures uniform, economical, high-production form dies even after several regrinds. In addition, D3 has considerable resistance to corrosion and rust.