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Carbon		0.95 - 1.05
Chromium		4.75 - 5.5
Iron		Balance
Manganese		1 max
Molybdenum		0.9 - 1.4
Phosphorus		0.03 max
Silicon		0.5 max
Sulphur		0.03 max
Vanadium		0.15 - 0.5

Principal Design Features		This alloy is one of the Cold Work, Medium Air Hardening type tool steels. It contains chromium and molybdenum with a relatively high (1%) carbon content and is capable of deep hardening from air quench so as to minimize distortion.

Applications		Used of die shapes, slitters and similar applications where wear resistance is important.

Machinability		Machinability is medium, about 85% that of the W group of tool steels which are rated at 100% for a baseline.

Forming		Forming is done by hot forging or machining.

Welding		This is an alloy steel and thus capable of being welded. Consult the alloy supplier for welding procedures.

Heat Treatment		Heat slowly to 1450 F and then increase temperature to 1750 F. Hold at 1750 F for 30 to 45 minutes then remove from furnace and air cool (air quench).

Forging		Forging temperature range is 2000 F to 1675 F. Do not forge below 1650 F.

Hot Working		No data in regard to hot working, other than forging. Contact the alloy supplier for information.

Cold Working		Cold working is done with the alloy in the annealed condition.

Annealing		Anneal at 1575 F and slow cool in the furnace at a rate of 40 F per hour or less.

Aging		Not applicable to this alloy.

Tempering		A2 is tempered after heat treating at temperatures ranging from 350 F for Rockwell C 62 to 1000 F for Rockwell C 56.

Hardening		See "Heat Treatment" and "Tempering".

Physical Data : [top]

Density (lb / cu. in.)	0.283
Specific Gravity	7.82
Melting Point (Deg F)	2595
Modulus of Elasticity Tension	28

MSO currently has no data available for this grade.