21NiCrMo2
2015-01-24 15:54:49 Origin： Remark：0 Click：
Steel 21NiCrMo2 is a 0.55%Ni - 0.5%Cr - 0.2%Mo Carburizing structural steel, 21NiCrMo2 Round bar, flat bar Steelmaking, ESR, Hot forging, rolling, heat treatment, ultrasonic test, cold working.
MATERIAL TECHNICAL DATASHEET - DIN 21NiCrMo2
MATERIAL CATEGORY: Carburizing structural steel
MATERIAL SPECIFICATIONS - DIN EN 10084 (1998), DIN 17210 (1986)
CHEMICAL COMPOSITION (mass weight %)
C (％): 0.17 ~ 0.23
Si (％): ≤ 0.40
Mn (％): 0.65 ~ 0.95
P (％)≤: 0.035
S (％)≤: 0.035
Cr (％): 0.35 ~ 0.70
Mo (％): 0.15 ~ 0.25
Ni (％): 0.40 ~ 0.70
Si (％): ≤ 0.40
Mn (％): 0.65 ~ 0.95
P (％)≤: 0.035
S (％)≤: 0.035
Cr (％): 0.35 ~ 0.70
Mo (％): 0.15 ~ 0.25
Ni (％): 0.40 ~ 0.70
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working temperature /℃: 1150～850
Heat treatment temperature /℃|annealing: 650～700
Heat treatment temperature /℃|carburizing: 900～950
Heat treatment temperature /℃|quenching (Center): 840～870
Heat treatment temperature /℃|quenching (Surface): 800~830 Oil
Heat treatment temperature /℃|tempering: 170～210
Hardness after annealing HBS≤: 197
Heat treatment temperature /℃|annealing: 650～700
Heat treatment temperature /℃|carburizing: 900～950
Heat treatment temperature /℃|quenching (Center): 840～870
Heat treatment temperature /℃|quenching (Surface): 800~830 Oil
Heat treatment temperature /℃|tempering: 170～210
Hardness after annealing HBS≤: 197
Size /mm: φ11
After surface hardening |σb/MPa: 980~1270
After surface hardening |σb/MPa: 980~1270
After surface hardening |σs≥/MPa: 785
After surface hardening |δ5(％)≥: 9
After surface hardening |ψ(％)≥: 35
After surface hardening |δ5(％)≥: 9
After surface hardening |ψ(％)≥: 35
After surface hardening |AKV①/J: 41
|size /mm: φ30|σb/MPa: 780~1080
|σs≥/MPa: 590
|δ5(％)≥: 10
|ψ(％)≥: 40
|AKV/J: 41
|σb/MPa: 690~930
|σs≥/MPa: 490
|δ5(％)≥: 11
|ψ(％)≥: 40
|AKV/J: -
|σs≥/MPa: 490
|δ5(％)≥: 11
|ψ(％)≥: 40
|AKV/J: -
TYPICAL APPLICATIONS
Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners, Mechanical gears, gear shaft, main axis, valve rod.
Process plant – fasteners, Mechanical gears, gear shaft, main axis, valve rod.
Mechanical parts - connecting rod, bolt and nut, Multidiameter shaft, Pressure vessel.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified engineers, E-mail: sales@ccsteels.com
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified engineers, E-mail: sales@ccsteels.com
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