GB/T 11251 42CrMo ultra high strength steel plate has high strength and toughness, good hardenability, no obvious temper brittleness, high fatigue limit and multiple impact resistance after quenching and tempering, and good impact toughness at low temperature. The 42CrMo steel is suitable for manufacturing large and medium plastic moulds requiring certain strength and toughness.
The physical property of GB/T 11251 42CrMo ultra high strength steel plate:
1) Critical point temperature (approximate value): Ac1 = 730 degrees C, Ac3 = 800 degrees C, Ms = 310 degrees C.
2) linear expansion coefficient: temperature 20~100 degrees C/20~200 degrees C/20~300 degrees C /20 ~400 degrees C/20~500 degrees C /20~600 degrees C. Linear expansion coefficient: 11.1 * 10K/12.1 * 10K/12.9*10K/13.5*10K/13.9*10K/14.1*10K.
3) Modulus of elasticity: temperature 200 degrees C/300 degrees C/400 degrees C/500 degrees C/600 degrees C, elasticity 210000MPa/185000MPa/175000MPa/165000MPa/155000Mpa.
Material properties.
Introduction of GB/T 11251 42CrMo ultra high strength steel plate has high creep strength and rupture strength at high temperature. The surface hardening after quenching and tempering is usually used as a heat treatment scheme. As a plastic mould steel, 42CrMo steel has excellent workability and good mechanical properties.
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