A2 Tool Steel Heat Treat Shrinkage

A rule of thumb is that liquid quenched.

A2 tool steel heat treat shrinkage.

Then heat to 1300 1400 f 704 760 c and equalize. The more highly alloyed grades such as h13 s7 a2 d2 and the high speed steels require multiple tempering cycles. 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. Heat at a rate not exceeding 400 f per hour 222 c per hour.

This graph demonstrates how knowing the part orientation from the mill supplied bar is important when trying to plan for size change during heat treatment. 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. Aisi a2 tool steel is high carbon high alloy tool steel designed to have excellent wear resistance and toughness. Soaking time should always be after the steel has caught up with the furnace tempera.

A 5 chromium steel which provides high hardness after heat treatment with good dimensional stability. A simplified guide to heat treating tool steels. A2 steel is an air hardening cold work tool steel. Plan for size change during heat treatment.

For simple geometries use only the second preheating temperature range. For example an 80 mm 3 15 cube of d 2 tool steel fig. Figure 2 shows the dimensional change of d 2 tool steel during tempering. It is heat treatable and will offer a hardness in the range 57 62 hrc.

The prefix a in the name designates it as an air hardening steel. Heat treating steel chart. This widely used tool steel has low distortion in heat treatment good machinability good toughness for severe service high abrasion resistance and deep. An uddeholm data sheet shows that when d 2 tool steel 3 15 x 3 15 x 3 15 is austenitized at 1 870 degrees f for 30 minutes and quenched in a vacuum furnace with 2 bar nitrogen overpressure it grows in one dimension while shrinking in the other two.

Shrinkage and loss of magnetic properties. 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. D 2 is a transformation hard ening tool steel that requires both a hardening and tempering step during the heat treating process. The dimensional changes on hardening figure 1 and tempering figure 2 p.

For complex and large tools heat to 1150 1250 f 621 677 c and equalize.