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NST 37-2 steel sample using lathe machine. Samples were subjected to different heat treatment: annealing normalising hardening and tempering in accordance to ASM International Standards 7 . The heat treatment conditions are listed in Table 2. Four specimens were prepared for each heat treatment type. Table1: Chemical composition of NST 37-2 ...
A Simplified Guide to Heat Treating Tool Steels When we consider that the greater overall costs of most tools and dies are incurred prior to heat treatment and further that proper heat treatment is critical to the successful appli ion of tooling this so-called “hardening” process is placed in it’s proper perspective of importance.
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 prefix "A" in the name designates it as an air-hardening steel. This means it hardens rapidly compared to other tool steels making heat treatment potentially difficult.
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