Tool Steel A2

Tool Steel A2 in CNC Machining

Tool steel A2 is an air-hardening, cold-work tool steel commonly used in CNC machining due to its excellent wear resistance and toughness.

Before machining, it’s often annealed to improve machinability. Heat treatment processes like quenching and tempering are applied to achieve the desired hardness. When in its annealed state, A2 is easier to machine. We choose appropriate cutting tools for effective machining. We ensure adequate cooling using water-soluble coolant and lubrication to prevent tool wear. We optimize cutting speeds and feeds and regularly monitor tool wear. Coated tools may enhance tool life, and post-machining processes such as grinding and stress relieving might be required.

Tool steel A2 is a versatile and reasonably priced tool steel. It is available in various shapes, such as flats, bars, and round rods, and it is typically purchased based on chemistry requirements rather than physical ones. The chemical composition of this steel includes carbon in the range of 0.95% to 1.05%, with a maximum of 1.00% for manganese and 0.50% for silicon. The steel also contains molybdenum in the range of 0.90% to 1.40%, chromium between 4.75% and 5.50%, and vanadium from 0.15% to 0.50%. Additionally, nickel is present in a maximum amount of 0.30%.

What is Tool Steel A2?

A2 tool steel is a cold work steel with 5% Chromium, offering high hardness (57-62 HRC) after heat treatment. While it has lower wear resistance than D2 and D3, A2 is easier to machine and maintains a good edge.

Its characteristics include good non-deforming properties, deep hardening, high dimensional stability after hardening and tempering, good machinability, and high compression strength. It is commonly used in applications like blanking tools, punch dies, trim dies, forming dies, gauges, shear blades, and stamping dies.