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

A-10, available upon request, is an air hardening, non-deforming tool steel with outstanding wear resistance and toughness properties.  This grade contains uniformly distributed graphitic particles for good machinability and non-seizing characteristics.  It also hardens from a low temperature range of 1450 – 1500°F (788 – 816°C) which minimizes size change and distortion in heat treatment.  This combination of properties makes A-10 material an ideal choice for a variety of applications such as gauges, arbors, forming rolls, shear blades and metal working dies and punches.

Hardening A-10, heat slowly to 1450 – 1500°F (788 – 816°C) hold for 1 hour per inch (25.4mm) maximum.  Hold at this temperature until thoroughly and uniformly heated.  Air cool to under 100°F (38°C), preferably to 80 – 90°F (27 – 32°C) for maximum hardness response.  Pieces up to 2” (51mm) in thickness should be austenitized at 1450°F (788°C), 2”- 4” (51 – 102 mm) at 1475°F (802°C) and over 4” (102mm) at 1500°F.  For large or intricately shaped pieces where preheating is considered advisable, preheat to 1220 – 1250°F (649 – 677°C) before transferring to the hardening furnace.  Best results are obtained by austenitizing in controlled atmosphere or vacuum furnaces or neutral salt baths.

Tempering A-10, heat slowly to the tempering temperature; hold for 1 hour per inch (25.4mm) of thickness and then air cool.  For most applications the tempering temperature should be within 300 – 500°F (149 – 260°C).  Actual hardness obtained will depend on section size since it affects the quenching rate in hardening.

 A-10 is an oversized material.


  •  + .015 up to .040 on thickness

  •  + .080 up to .125 on width


  •  Up to 1” + .007 up to .018  

  •  1” to under 6” + .015 up to .040 

  •  6” and up + .0625 up to .0250


 Quench Medium: Air, Salt Baths, Controlled atmosphere, vacuum  furnaces.

 Tempering Range:  300 through 500°F


 A-10 Material In Stock

 Color Code: BLUE & ORANGE

 Flat Dimensions

 Sizes available upon request

 Round Dimensions 

  •  ½” up to 6”

  •  Other sizes available upon request.

 A-10 Typical Analysis











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