Heat Treating - 6: Tool Steels
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WARNING: Machine tools present a safety hazard. Improper operation can result in severe injury. These topics are for non-laboratory study only and are not to be used in conjunction with the operation of any tool or machine described herein. Never use a machine tool without the supervision of a qualified instructor.

Tool steels are steels used to make tooling. Tooling can be a punch for a punch and die set (left), a knife blade roller for a shear press (right), or a mold cavity for a plastic injection mold (below). There are hundreds of applications for tool steels. The most common heat treatable tool steels are W type which is quenched in water, A type which is quenched in air, and O type which is quenched in oil.
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label: heat treating, annealing, normalizing, stress relieving,. qunench, quench temper, tool steels, hardness, Brinell, rockwell, alloyed steel, carbon contenet