A-2 tool steel is a versatile, air hardening tool steel that is characterized by good toughness and excellent non-deforming properties in heat treatment. A-2 is intermediate in wear resistance between O-1 and D-2. It is an effective combination of strength and toughness, tool performance and price.
A-2 has a machinability rating of 65% of a 1% carbon tool steel.
A-2 is sold in the annealed condition. Typical annealed hardness is Rc 12/22.
A-2 maximum working hardness is Rc 62.
C Mn Si Cr Mo V
1.00 0.75 0.30 5.0 1.00 0.25