| Chemical Composition (%) | C | Si | Mn | Cu | Cr |
| 0.56-0.64 | 0.15-0.35 | 0.70-1.00 | ≤ 0.30 | 0.07-1.00 |
SUP9A Hot-Rolled Alloy Spring Steel
Type of steel and characteristics:
Spring steel suitable for quenching and tempering
Applications:
Laminated springs, helical plate or spiral springs as well as tension or pressure springs.