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Carbon		1.4 - 1.6
Chromium		11 - 13
Cobalt		1 max
Iron		Balance
Manganese		0.6 max
Molybdenum		0.7 - 1.2
Phosphorus		0.03 max
Silicon		0.6 max
Sulphur		0.03 max
Vanadium		1.1 max

Principal Design Features		This alloy is one of the Cold Work, high carbon, high chromium type tool steels. D2 is a deep hardening, highly wear resistant alloy. It hardens upon air cooling so as to have minimum distortion after heat treatment.

Applications		Used for long run tooling applications where wear resistance is important, such as blanking or forming dies and thread rolling dies.

Machinability		Machinability of D2 is poor. Using the water hardening simple alloy tool steels (W group) as a base of 100% the D2 alloy would rate about 50% in machinability.

Forming		Forming is done by forging and machining.

Welding		Consult the alloy supplier for information as to welding.

Heat Treatment		Preheat very slowly to 1500 F and then increase temperature to 1850 F. Hold at 1850 F for 20 to 45 minutes and air cool (air quench).

Forging		Forging may be done in the range of 1950 F down to 1750 F. Do not forge below 1700 F.

Hot Working		No data other than for "Forging". Consult the alloy supplier for more information.

Cold Working		Cold working by conventional methods may be done with the alloy in the annealed condition.

Annealing		Anneal at 1600 F to 1650 F followed by slow furnace cooling at 40 F per hour or less.

Aging		Not applicable to this alloy.

Tempering		Tempering may be done in the range of 400 F for Rockwell C 61 to 1000 F for Rockwell C 54.

Hardening		See "Heat Treatment" and "Tempering".

Other Comments		D2 is very high in wear resistance, but is also low in toughness.

Physical Data : [top]

Density (lb / cu. in.)	0.283
Specific Gravity	7.8
Melting Point (Deg F)	2590
Modulus of Elasticity Tension	28

MSO currently has no data available for this grade.