20MnV alloy structural steel

  20MnV, alloy structural steel. Unified Digital Code: A01202 Standard: GB / T 3077-1988

  Features and application: 20MnV strength, ductility, toughness and hardenability 20Mn2 than good. 20MnV equivalent 20CrNi steel, can be used in the manufacture of boilers, pressure vessels and pipelines.

20MnV steel strength, ductility, toughness and hardenability steel is better than 20Mn2 steel hardenability in oil critical diameter of 7 ~ 14mm, cutting still be good, carburizing tendency of grain growth when small, but the heat treatment have temper brittleness. The steel for carburizing steel, the direct quenching after carburizing, quenching does not require to improve by the second heart tissue, can replace 20Cr, 20CrNi steel. 20MnV steel also has some hot strong, weldability, and good.

20MnV alloy structural steel

Physical properties
Chemical composition
(Wt) (%)

     Carbon C: 0.17 ~ 0.24

     Si Si: 0.17 ~ 0.37

Manganese Mn: 1.30 ~ 1.60

Sulfur S: to allow the residual content of ≤ 0.35

Phosphorus P: allow the residual content of ≤ 0.35

Chromium Cr: allow the residual content of ≤ 0.30

  Ni: to allow the residual content of ≤ 0.30

Copper Cu: to allow the residual content of ≤ 0.30

Vanadium V: 0.07 ~ 0.12
Mechanical properties
Blank sample size (mm): 15

Heat treatment: the first quenching temperature (℃): 880; coolant: water, oil

Second quenching temperature (℃): - tempering heating temperature (℃): 200; coolant: water, air

Tensile strength σb (MPa): ≥ 785 (80)

  Yield strength σs (MPa): ≥ 590 (60)

Elongation δ5 (%): ≥ 10

Reduction of area ψ (%): ≥ 40

  Impact energy Akv (J): ≥ 55

   Impact toughness αkv (J/cm2): ≥ 69 (7)

Brinell hardness (HBS100/3000) (annealing or tempering condition): ≦ 187

     Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.