Key Features: This steel compared with 12CrMoV steel, has a higher oxidation resistance and heat resistance. Creep rupture strength limit and the value of this steel is very close, and has a high plasticity in the case of persistent tension; the process of steel with good weldability, but before welding to be preheated to 300 ℃, after welding required in addition to the stress deal with. 12cr1mov steel plate chemical composition Si: 0.17 ~ 0.37 Mn: 0.40 ~ 0.70 Cr: 0.90 ~ 1.20 Mo: 0.25 ~ 0.35 V: 0.15 ~ 0.30 Mechanical Properties: [sample size] 30mm [blank] quenching heat treatment temperature (℃): 970; coolant: air tempering heating temperature (℃): 750; coolant: [empty] Lara mechanical properties of strength (σb / MPa): ≧ 490 yield point (σs / MPa): ≧ 245 Elongation ( δ5 /%): ≧ 22 section shrinkage (ψ /%): ≧ 50 impact energy (Aku2 / J): ≧ 71 Brinell hardness (HBS100 / 3000) (annealing or tempering state): ≦ 179 12cr1mov alloy steel weight formula: length × width × thickness × 0.00785 = kg / m [Application Examples of such steel is mainly after normalizing and tempering used for the manufacture of high-voltage equipment temperature does not exceed 570 ~ 585 ℃ overheating pipe, conduit, coil and the other corresponding forgings.