JIS G4051 S40C Steel — Specifications & Listings
JIS G4051
Japanese medium carbon steel, widely used
Grade Details
| Grade | JIS G4051 S40C |
| Standard | JIS G4051 |
| Description | Japanese medium carbon steel, widely used |
| Applications | Shafts, gears, bolts, couplings, machine parts |
Equivalent / Similar Grades
Chemical Composition (%)
| C |
Si |
Mn |
S |
P |
| 0.37–0.43 |
0.15–0.35 |
0.60–0.90 |
≤0.035 |
≤0.030 |
Mechanical Properties
| Tensile Strength |
≥570 MPa |
| Yield Strength |
≥390 MPa |
| Elongation |
≥17% |
| Hardness |
≤179 HB |
Typical Available Sizes
| Round Bar |
10mm–250mm dia |
| Flat Bar |
16×5mm–200×50mm |
| Hex Bar |
13mm–100mm A/F |
Sizes are indicative. Contact seller for exact availability.
Active JIS G4051 S40C Listings on M-EX