A2 Tool Steel
A2 tool steel is an air hardening tool steel which offers high abrasion resistance and high toughness after heat treatment. As the chromium content in A2 tool steel is less, so the wear resistant properties of A2 are not so great as found in D2 tool steel and D3 tool steel , but it is easily machineable than D2 and D3 tool steel. As A2 tool steel has an air hardening quality, so it is more suitable than oil hardening tool steels or water hardening tool steels in cases where large mass of tools have to be produced.