France · AFNOR NF
54SiCr6
NF A35-571 — Iron and steel. Alloy structural steels for hot formed spring manufacture(AM1-1977)
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.5 | 0.58 | ||
| Cr | 0.5 | 0.8 | ||
| Mn | 0.5 | 0.8 | ||
| P | 0.025 | |||
| S | 0.025 | |||
| Si | 1.2 | 1.6 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| bars, flats, steel bars, wire, quenched and tempered | 1300.00 | 1450.00 | 6.00 | 8.00 | ||
| bars, HR, steel bars, wire, hardened | 扁钢 55.00 |
Heat treatment
| Type | 1 |
|---|---|
| Heat-treatment curve | Hardness-Tempering |
| Heat-treatment curve | 淬透性 |
| Heat-treatment curve | TTT |