*Always consult your Heat Treater*
      *Information Provided is General*

A-2 is an air-hardening tool and die steel. It is intermediate in abrasion resistance between D-2 and O-1 die steel. It possesses excellent non-deforming properties, is deep hardening, and has good toughness properties. Hardening happens between 1750 – 1800°F. A-2 is a 5% chromium air hardening die steel that is less expensive than high carbon-high chromium materials. Typical uses for this grade of material are blanking and forming punches, dies and rolls, slitting cutters, thread roller dies, trimmer dies (both cold and hot), plastic molding dies, straightening and bending dies and gages.

A-2 should be preheated at 1300 – 1400°F then transferred to a furnace at 1750 – 1800°F. Sizes over three inches (76.2mm) in smallest dimension may not achieve full hardness on air cooling, and usually it is necessary to speed up the cooling rate in the critical temperature range of 900 – 1400°F.

Temper as soon as pieces have cooled to room temperature and heat slowly to tempering temperature selected to obtain the hardness desired. For most applications, A-2 is tempered in the range of 350 – 500°F. Double tempering is desirable, particularly when a temperature of 900°F or higher is used.

A-2 is an oversized material.


  •  + .015 up to .040 on thickness  

  •  + .080 up to .125 on width


  •  Up to 1″ + .007 up to .0181

  •  1″ up to 6″ + .015 up to .0406

  •  6″ and up + .0625 up to .250

 Hardening Temp.:    1750 through 1800ºF

 Quench Medium:          Air Salt Bath Oil

 Tempering Range:    400 through 650ºF

 Typical Hardness Level:    57 –  62 R/C 

 Preheat Forging:     1400 through 1500ºF

 Forging Temperature:      2000 through 2100ºF

 Anneal Temperature: 1600ºF

 Anneal cooling method:    Furnace cool to 1000ºF at 100ºF per hr., then air cool

 Anneal Hardness:     235 BHN


 A-2 Material in Stock

 Color code:    YELLOW 

 Flat Dimensions:

  • ¼”x1″ up to     8″x 8″

  • Non-standard sizes, quoted upon request

 Round Dimensions

  • 3/8″ up to 16″

  • Non-standard sizes, quoted upon request

 A-2 Typical Analysis













  · Slight variations from typical analysis shown may occur in order  to maintain the desired graphitizing potential.