Technical parameters of 20CrMo alloy steel plate

1. 20CrMo plate is an alloy structural steel plate, used to make various alloy structural steels and their parts, such as power station boiler superheater headers and large-diameter tube plate structural parts.

2. Chemical composition of 20CrMo alloy steel plate:
Carbon C: 0.17-0.24
Silicon Si: 0.17-0.37
Manganese Mn: 0.40-0.70
Sulfur S: allowable residual content ≤0.035
Phosphorus P: allowable residual content ≤0.035
Chromium Cr: 0.80-1.10
Molybdenum Mo: 0.15-0.25
Nickel Ni: allowable residual content ≤0.3
Copper Cu: allowable residual content ≤0.3

3. Mechanical properties of 20CrMo alloy steel plate:
Tensile strength σb (MPa): ≥885(90)
Yield strength σs (MPa): ≥685(70)
Elongation δ5 (%): ≥12
Reduction of area ψ (%): ≥50
Impact energy Akv (J): ≥78
Impact toughness value αkv (J/cm2): ≥98(10)
Hardness: ≤197HB
Sample size: sample blank size is 15mm

4. Delivery status and heat treatment specifications of 20CrMo alloy steel plate:
Delivery status: delivery in the heat treatment (normalizing, annealing or high temperature tempering) or non-heat treatment status, the delivery status should be indicated in the contract.

20CrMo heat treatment heat treatment:
20CrMo material belongs to low-carbon alloy structural steel, suitable for carburizing and quenching treatment; heat treatment specifications: quenching at 880℃, water cooling, oil cooling; tempering at 500℃, water cooling, oil cooling.