SUP6 Steel — Specifications & Listings
JIS G4801 — Japanese silicon manganese spring steel
Grade Details
| Grade | SUP6 |
| Standard | JIS G4801 |
| Description | Japanese silicon manganese spring steel |
| Applications | Automotive suspension springs, leaf springs |
Equivalent / Similar Grades
Chemical Composition (%)
| C |
Si |
Mn |
S |
P |
| 0.56–0.64 |
1.50–1.80 |
0.70–1.00 |
≤0.030 |
≤0.035 |
Mechanical Properties
| Tensile Strength |
≥1130 MPa |
| Yield Strength |
≥980 MPa |
| Elongation |
≥7% |
| Hardness |
341–415 HB |
Typical Available Sizes
| Round Bar |
10mm–50mm dia |
| Flat Bar |
15×5mm–80×15mm |
| Spring Flat |
3×20mm–16×100mm |
Sizes are indicative. Contact seller for exact availability.
Active SUP6 Listings on M-EX