A2 Tool Steel Heat Treat Chart

A2 air hardening tool steel annealing heat uniformly to 1650 f.

A2 tool steel heat treat chart.

A2 tool steel properties. 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. 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. This varies somewhat based on a number of theoretical and practical factors.

The heat treat process results in unavoidable size increases in tool steels because of the changes in their microstructure. The chart below describes various types of tool steels their composition and appropriate heat treating applications. 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. It is heat treatable and will offer a hardness in the range 57 62 hrc.

Generally supplied annealed to hb 231 max. It s highly wear resistant and moderately tough. A2 tool steel can be difficult to heat treat. Most tool steels grow between about 0 0005 and 0 002 inch per inch of original length during heat treatment.

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. A2 steel is an air hardening cold work tool steel. 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. 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.

Soak at temperature for approximately two hours and cool slowly in the fur nace. 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.