The main characteristics of 12Cr1MoVCompared with 12CrMoV steel, this steel has higher oxidation resistance and thermal strength. The creep limit of 12Cr1MoV steel is very close to the endurance strength value, and it has high plasticity under permanent tension. 12Cr1MoV pressure vessel steel has good manufacturability and weldability, but it needs to be preheated to 300°C before welding and stress relief after welding. deal with.
12Cr1MoV steel is a steel grade widely used in high-pressure, ultra-high-pressure, subcritical power station boiler superheaters, headers and main steam ducts. It still has high thermal strength and oxidation resistance at 580°C, and has high lasting plasticity. The production process is relatively simple, and the welding performance is good, but it is more sensitive to the normalizing cooling rate. Long-term use at 580°C will produce pearlite spheroidization.
Mechanical properties of 12Cr1MoV steelTensile strength (σb/MPa): ≥490
Yield point (σs/MPa): ≥245
Elongation after breaking (δ5/%): ≤22
Reduction of area (ψ/%): ≥50
Impact absorption power (Aku2/J): ≥71
Impact toughness value αkv (J/cm2): ≥88(9)
Brinell hardness (HBS100/3000) (annealed or high temperature tempered state): ≤17
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