Heppenstall Gr. {.57 is a nickel-chromium-molybdenum hot-work tool and die steel that is sold in the hardened condition under the trade name Pyrotem and in the annealed condition under the trade name Pyroneal. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-190. Producer or source: Midvale-Heppenstall Company.

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