SCM420 wire for spheroidizing annealing cold heading SCM420H wire for standard parts

Implementation standard: JIS G4053-2003

【Heat treatment】: spheroidizing annealing

【Surface treatment】: phosphorus saponification

【Material】: Alloy structural steel: SCM420

【Mechanical properties】: Product hardness (170-205HV or 85-92HRB); Tensile strength (Mpa); Yield (Mpa); Section shrinkage and other test.

【Use】: Used for important structural parts working under high loads, such as transmission parts of vehicles and engines; Turbine generator rotor, main shaft, heavy load transmission shaft, large section parts.

【Chemical composition】

● Chemical composition (unit %) :

Carbon C: 0.18 ~ 0.23

Silicon Si: 0.15 ~ 0.35

Manganese Mn: 0.60 ~ 0.90

Sulfur S: Allowable residual content ≤0.030

P: Allowable residual content ≤0.030

Chromium Cr: 0.90 ~ 1.20

Nickel Ni: Allowable residual content ≤0.25

Copper Cu: Allowable residual content ≤0.30

Molybdenum Mo: 0.15 ~ 0.25

【Wire diameter error】： ±0.02mm[This tolerance standard is the wire drawing industry standard], can be changed by customer request.

【Quality control】 : Full sampling, gold image inspection: tissue spheroidization grade, grain size, edge decarburization/carburization, etc.

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