What are the mechanical properties of 12Cr1MoV steel plate?

The main characteristics of 12Cr1MoV steel plate: Compared with 12CrMoV steel, this steel has higher oxidation resistance and thermal strength. The creep limit of this steel is very close to the permanent strength value, and it has high plasticity in the case of permanent stretching. The 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 plate 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 the second type of temper brittleness caused by the segregation of phosphorus and other impurity elements at the grain boundaries. Spheroidization of pearlite will occur after long-term use.

Tensile strength (σb/MPa): ≥490
Yield point (σs/MPa): ≥245 Elongation after breaking (δ5/%): ≤22
Reduction of area (ψ/%): ≥50
Impact absorption (Aku2/J): ≥71
Impact toughness value αkv (J/cm2): ≥88(9)
Brinell hardness (HBS100/3000) (annealed or high temperature tempered state): ≤179

The 12Cr1MoV steel plate is mainly used after normalizing and high temperature tempering to manufacture superheated steel pipes, ducts, serpentine pipes and other corresponding forgings in high-pressure equipment whose working temperature does not exceed 570℃.