21NiCrMo2
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21NiCrMo2 21NiCrMo2
21NiCrMo2
21NiCrMo2
21NiCrMo2
21NiCrMo2
  • Products Details

Jiangsu Bealloy Co.,Ltd produce special alloy products, including Bar, Rod, Sheet, Plate, Pipe, Tube, Pipe Fittings, Rings, Forgings, Flange, Coil and Strip, etc. If any requirements not found, please email us sales@bealloy.com. We will offer you best price and more details. Any customizationare accepted.


21NiCrMo2 is a commonly used alloy carburizing steel. After carburizing, the surface has relatively high hardness, wear resistance and contact fatigue strength. At the same time, the core still retains good toughness and can withstand high impact loads.

Chemical Composition %
C Si Mn S P Cr Ni Cu
Mo
0.17 - 0.23 0.15 - 0.40 0.60 - 0.90 max 0.035 max 0.035 0.35 - 0.65 0.40 - 0.70 max 0.30 0.15 - 0.30

Mechanical properties
Tensile strength σb (MPa)
≥1176 (120)
Elongation δ5 (%)
≥9
Section shrinkage rate ψ (%)
≥45
Impact toughness value αkv (J / cm2)
78(8)

In what applications is 21NiCrMo2 used?

20NiCrMo2 is mainly used as a material for impact-resistant and wear-resistant parts such as automobile bearings.


Heat treatment specifications and metallographic structure

Heat treatment specifications: quenching, 880 ± 20 ℃ for the first time, 790 ± 20 ℃ for the second time, oil cooling; tempering, 150 ~ 200 ℃, air cooling.


Metallographic structure: Martensite

Delivery status

Hot-rolled or forged steel is delivered in the hot-rolled (forged) state or annealed state. Cold drawn steel is delivered annealed.

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