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SCM420 Alloy Structural Steel

SCM420 Alloy Structural Steel

Payment Terms : L/C, T/T
Style : Square Plate
Material : Alloy Steel
Service : OEM/ODM
Trade Terms : FOB
Technique : Forged
Production Capacity : 2000 Tons/Month
Standard : JIS
Min. order : 20 Tons
Main Markets : North America, South America, Eastern Europe, Southeast Asia, Mid East, Eastern Asia, Western Europe
Report : Ut Quality Test
HS Code : 7228400000
Place of Origin : china
Category : Structural Steel
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Grade: GB 20CrMo, DIN 25CrMo4(1.7218)
Alloy structural steel, higher hardenability, no termper brittleness, quite good weldability, good machinability and cold strain plasticity.
General Used under the state of quenched and tempered or case hardening, for manufacture of non-corrosive medium and the operatiing temperature lower than 250° C, and high-pressure pipes, all kinds of fasteners and higher carburzing parts which contains nitrogen and hytrogen mixture, such as gears, shafts, and so on.
Chemical composition(%):
C: 0.18-0.23
Si: 0.15-0.35
Mn: 0.60-0.90
S/P/Cu: =Cr: 0.9-1.20
Ni: Mo: 0.15-0.25
Mechinanical Properties:
Tensile strength σb (MPa): ‰¥ 885 (90)
Yield strength σs (MPa): ‰¥ 685 (70)
Elongation δ 5 (%): ‰¥ 12
Section shrinkage ψ (%): ‰¥ 50
Impact energy Akv (J): ‰¥ 78
The value of Impact toughness α Kv (J / cm ² ): ‰¥ 98 (10)
Hardness: ‰¤ 197HB
Sample size: Sample blank size is 15mm
Heat treatment:
Hardening: 880 ° C, water-cooled, oil cooled;
Tempering 500 ° C, water-cooled, oil cooled.
Delivery Status:
With heat treatment(normalizing, annealing, or high-termperature tempering), or without heat treatment, it should be indicated in the contract.

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