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JIS G4103 SNCM220 bearing steel stock, SNCM220 steel price

JIS G4103 SNCM220 bearing steel stock, SNCM220 steel price

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(Carburizing) bearing steel: SNCM220

Standard: JIS G4053-2003

Corresponding to U.S. Grade: 8620

British corresponding grades: 805M20

France corresponding grades: 20NCD2

JIS G4103 SNCM220 bearing steel Features and Scope:

SNCM220 bearing steel is a commonly used alloy carburizing steel, has a very high surface hardness, wear resistance and contact fatigue strength after carburizing, while core part also retains good toughness, can withstand high impact loads. SNCM220 mainly used for automotive bearings and other impact-resistant, wear-resistant parts of the material.

JIS G4103 SNCM220 bearing steel mechanical properties:

Tensile strength σ b (MPa): ≥ 1176 (120)

Elongation δ 5 (%): ≥ 9

Reduction of ψ (%): ≥ 45

Impact toughness α kv (J/cm2): ≥ 78 (8)

Sample size: Sample size is 15mm

JIS G4103 SNCM220 bearing steel heat treatment and microstructure specifications:

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

Microstructure: martensite.

JIS G4103 SNCM220 bearing steel Delivery status: hot-rolled or forged steel hot rolled (forging) state or annealed state delivery. Cold-drawn steel in annealed condition delivery.

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