JIS G4051 carbon steels plates / sheets/ coils/ strips / flat bars are for machine structural use. JIS G4051 steels are manufactured by hot rolling, hot forging and hot extruding. JIS G4051 standard applies to steel products with a uniform cross-section, which are generally supplied for use after further processes of forging, cutting and heat treatment.
JIS G4051 steel grades equivalent:
JIS S20C steel equivalent grades: EN C22, AISI / SAE 1020, GB 20#
JIS S25C steel equivalent grades: EN C25, AISI / SAE 1025, DIN CK25, GB 25#
JIS S30C steel equivalent grades: EN C30, AISI / SAE 1030, DIN CK30, GB 30#
JIS S35C steel equivalent grades: EN C35, AISI / SAE 1035, DIN CK35, GB 35#
JIS S40C steel equivalent grades: EN C40, AISI / SAE 1040, DIN CK40, GB 40#
JIS S45C steel equivalent grades: EN C45, AISI / SAE 1045, DIN CK45, GB 45#
JIS S50C steel equivalent grades: EN C50, AISI / SAE 1050, DIN CK50, GB 50#
JIS S55C steel equivalent grades: EN C55, AISI / SAE 1055, DIN CK55, GB 55#
Grade | C | Si | Mn | P | S |
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 |
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