What is the difference between 15CrMo and 12Cr1MoV?
15CrMo steel is a heat-resistant steel with pearlite structure, executive standard: GB/T 3077-2015. 15CrMo has high thermal strength (δb≥440MPa) and oxidation resistance at high temperatures, and has certain resistance to hydrogen corrosion. Since the steel contains high content of Cr, C and other alloying elements, the steel has an obvious hardening tendency and poor weldability. 15CrMo is mainly used in crankshafts, gears, camshafts of internal combustion engines, and gears in important reducers.
12Cr1MoV national standard high-performance alloy structural steel, implementation standard: GB/T 3077-201512Cr1MoV has higher oxidation resistance and thermal strength. The creep limit of this steel is very close to the durable strength value, and it has high plasticity under sustained stretching; the steel has good processability and weldability, but it needs to be preheated to 300°C before welding, and stress relief is required after welding. deal with. This kind of steel is mainly used after normalizing and high-temperature firing to make superheated steel pipes, conduits, serpentine pipes and other corresponding forgings in high-pressure equipment whose working temperature does not exceed 570-585°C.
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