A2 Tool Steel Heat Treat Chart

It s highly wear resistant and moderately tough.

A2 tool steel heat treat chart.

This widely used tool steel has low distortion in heat treatment good machinability good toughness for severe service high abrasion resistance and deep. A2 tool steel is an air hardening cold work chromium alloy die steel that is preferable to o1 tool steel in applications requiring greater size stability machinability and safer hardening. A 5 chromium steel which provides high hardness after heat treatment with good dimensional stability. Steel composition harden f temper f anneal f normalize f quench atmosphere.

A2 tool steel can be difficult to heat treat. A2 is also an air hardening tool steel but includes less than half the chromium 4 75 5 50 and a bit less carbon 0 95 1 05 than d2. The wear resistance properties and cost place a2 between that of o1 and d2 tool steel making it a good all purpose grade for many applications. Most tool steels grow between about 0 0005 and 0 002 inch per inch of original length during heat treatment.

Generally supplied annealed to hb 231 max. Stress relieving when heavy machining cuts are employed the resultant stresses may be relieved by heating the material to 1200 f to 1250 f for one hour and cooling in still air. Like d2 it is incredibly resistant to distortion during heat treating and is moderately machinable and grindable. The steel is composted of 1 percent carbon 3 percent silicon 6 percent manganese 5 3 percent chromium 1 1 percent molybdenum and 2 percent vanadium.

The chart below describes various types of tool steels their composition and appropriate heat treating applications. It is heat treatable and will offer a hardness in the range 57 62 hrc. Soak at temperature for approximately two hours and cool slowly in the fur nace. This varies somewhat based on a number of theoretical and practical factors.

A2 tool steel is a 5 chromium medium alloy cold work tool steel possessing sufficient hardenability to be air hardened to 60 rc surface hardness level with good depth of hardening. A2 air hardening tool steel annealing heat uniformly to 1650 f. A2 tool steel is a versatile air hardening tool steel that is characterized by good toughness and excellent dimensional stability in heat treatment a2 is intermediate in wear resistance between o1 oil hardening tool steel and d2 high carbon high chromium tool steel.