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Starrett Air-Hardened 02 Tool Steel Flat Stock, Precision Ground, Oversize Tolerance, ASTM A681

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Specifications for this item
Indentation Hardness
54-62 rockwell_c
Item Shape
Tensile Strength Max
100  KSI
Material Type
Tool Steel
Part Number
Brand Name
Small Parts
Production Method
Precision Ground
Upper Temperature Range
1775  Degrees Fahrenheit
Exterior Finish
As Ground
Specification Met
Material Composition
System of Measurement
LowerTemperature Range
1700  Degrees Fahrenheit

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Key Features

  • High wear resistance is also ideal for punches and dies to stamp silicon, stainless steels, monel metal and other types of abrasive material
  • Maintains close dimensional accuracy throughout the heat treating process
  • AISI/SAE A2 is a more highly alloyed tool steel that provides excellent wear resistance and toughness and good machinability.
  • Full-length identification eliminates confusion with other steels
  • The Starrett Company uses its own ground flat stock for many of its precision tool parts

Product Description

Furnished in 18" and 36" lengths ground straight and parallel. The 5 percent chromium content makes this steel especially desirable for punches and dies to be used in long production runs since it gives the tools far longer life Up to 50 percent more pieces per sharpening can be produced than with oil hardening steel. 499 Air Hardening Ground Flat Stock have a wide hardening range of 1700 degree F to 1775 degree F, with 1750 degree F recommended for most work For heavier sections use the high side of the range Heat uniformly throughout but do not soak longer than necessary Cool in still air No pre-heat is required if pack or atmosphere controlled furnace methods are used, but with the open furnace method a pre-heat of 1450 degree F is recommended. A tempering time of two hours at temperature is recommended Use chart for selecting the desired Rockwell C hardness and corresponding tempering temperature For maximum toughness, double temper for two hours at each temperature recommended The following table may also be used as a guide, depending on the type of work. Light Blanking Punches and Dies: 400 degree-425 degree F. Heavy Blanking Punches and Dies: 700 degree F. Annealing: 1525 degree-1575 degree F Furnace cool at no more than 50 degree per hour to 800 degree for maximum softness.

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