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Chemical composition of JIS G4501 carbon steel for mechanical structure

Chemical composition of JIS G4501 carbon steel for mechanical structure

JIS G4501 carbon steel for mechanical structure is suitable for mechanical parts. Products made by rolling or forging include: hot-rolled, forged rods, wires, hot-rolled plates, strips, and hot-rolled flats.

Chemical composition of JIS G4501 carbon steel for mechanical structure：

Grade Chemical composition / %
C Si Mn P ≤ S ≤V
S10C 0.08-0.13 0.15-0.35 0.30-0.60 0.030 0.035
S12C 0.10-0.15 0.15-0.35 0.30-0.60 0.030 0.035
S15C 0.13-0.18 0.15-0.35 0.30-0.60 0.030 0.035
S17C 0.15-0.20 0.15-0.35 0.30-0.60 0.030 0.035
S20C 0.18-0.23 0.15-0.35 0.30-0.60 0.030 0.035
S22C 0.20-0.25 0.15-0.35 0.30-0.60 0.030 0.035
S25C 0.22-0.28 0.15-0.35 0.30-0.60 0.030 0.035
S28C 0.25-0.31 0.15-0.35 0.60-0.90 0.030 0.035
S30C 0.27-0.33 0.15-0.35 0.60-0.90 0.030 0.035
S33C 0.30-0.36 0.15-0.35 0.60-0.90 0.030 0.035
S35C 0.32-0.38 0.15-0.35 0.60-0.90 0.030 0.035
S38C 0.35-0.41 0.15-0.35 0.60-0.90 0.030 0.035
S40C 0.37-0.43 0.15-0.35 0.60-0.90 0.030 0.035
S43C 0.40-0.46 0.15-0.35 0.60-0.90 0.030 0.035
S45C 0.42-0.48 0.15-0.35 0.60-0.90 0.030 0.035
S48C 0.45-0.51 0.15-0.35 0.60-0.90 0.030 0.035
S50C 0.47-0.53 0.15-0.35 0.60-0.90 0.030 0.035
S53C 0.50-0.56 0.15-0.35 0.60-0.90 0.030 0.035
S55C 0.52-0.58 0.15-0.35 0.60-0.90 0.030 0.035
S58C 0.55-0.61 0.15-0.35 0.60-0.90 0.030 0.035
S09CK 0.07-0.12 0.10-0.35 0.30-0.60 0.025 0.025
S15CK 0.13-0.18 0.15-0.35 0.30-0.60 0.025 0.025
S20CK 0.18-0.23 0.15-0.35 0.30-0.60 0.025 0.025

The residual Cu, Ni, Cr and Ni + Cr of S09CK, S15CK and S20CK are ≤ 0.25%, 0.20%, 0.20% and 0.30% respectively; Cu, Ni, Cr and Ni + Cr of other grades respectively ≤ 0.30%, 0.20%, 0.20% and 0.35%.

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