Silicon-chromium spring steel — superior to 51CrV4 at elevated temperatures. Standard for automotive valve springs and suspension components in hot conditions.
60SiCr7 per EN 10089. Si addition significantly increases elastic limit and fatigue strength at elevated temperatures (up to 200 C). Cr enhances hardenability and oxidation resistance. Q+T achieves Rm 1600-1900 MPa. Standard for engine valve springs, conical disc springs and torsion bars operating at elevated temperatures.
| Standard Body | Designation | Country / Region | Note |
|---|---|---|---|
| EN / ISO | 60SiCr7 | EU / International | |
| DIN | 60SiCr7 / 1.8153 | Germany | |
| AISI/SAE | 9262 (nearest) | USA | |
| ASTM | A689 Grade 9262 | USA | |
| BS EN | 685A57 (nearest) | UK | |
| JIS | SUP11 (nearest) | Japan | |
| GOST | 60S2H2A (60S2KhA) | Russia / CIS | |
| UNI | 60SiCr7 | Italy | |
| NF | 60SC7 | France | |
| SS | 2085 | Sweden | |
| PN | 60S2H | Poland | |
| CSN | 15290 | Czech Republic | |
| UNS | G92620 (nearest) | USA (UNS) | |
| GB | 60Si2CrA | China | |
| JUS | C.5233 | Yugoslavia / Serbia | Si-Cr spring steel; JUS B.B3.200 |
| ONORM | 60SiCr7 | Austria |
| # | Standard Body | Designation | Country / Region | Note |
|---|---|---|---|---|
| 1 | EN / ISO | 60SiCr7 | EU / International | — |
| 2 | DIN | 60SiCr7 / 1.8153 | Germany | — |
| 3 | AISI/SAE | 9262 (nearest) | USA | — |
| 4 | ASTM | A689 Grade 9262 | USA | — |
| 5 | BS EN | 685A57 (nearest) | UK | — |
| 6 | JIS | SUP11 (nearest) | Japan | — |
| 7 | GOST | 60S2H2A (60S2KhA) | Russia / CIS | — |
| 8 | UNI | 60SiCr7 | Italy | — |
| 9 | NF | 60SC7 | France | — |
| 10 | SS | 2085 | Sweden | — |
| 11 | PN | 60S2H | Poland | — |
| 12 | CSN | 15290 | Czech Republic | — |
| 13 | UNS | G92620 (nearest) | USA (UNS) | — |
| 14 | GB | 60Si2CrA | China | — |
| 15 | JUS | C.5233 | Yugoslavia / Serbia | Si-Cr spring steel; JUS B.B3.200 |
| 16 | ONORM | 60SiCr7 | Austria | — |
| Element | Symbol | Min % | Max % | Typical % |
|---|---|---|---|---|
| Carbon | C | 0.5600 | 0.6400 | 0.6000 |
| Silicon | Si | 1.6000 | 2.0000 | 1.8000 |
| Manganese | Mn | 0.7000 | 1.0000 | 0.8500 |
| Chromium | Cr | 0.2000 | 0.4000 | 0.3000 |
| Condition | Code | Rm min MPa | Rm max MPa |
Re min MPa | Re max MPa |
A₅ min % |
Z % |
KV J |
HB min | HB max | HRC min | HRC max | E GPa |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Soft Annealed | +A | 900 | 1,100 | 700 | 900 | 10.0 | 35.0 | — | 260 | 320 | — | — | 210.0 |
| Q+T (t<=4mm wire) | +QT | 1,700 | 2,000 | 1,550 | — | 5.0 | 20.0 | — | 495 | 590 | — | — | 210.0 |
| Q+T (t=8-12mm) | +QT | 1,600 | 1,900 | 1,400 | — | 6.0 | 23.0 | — | 455 | 555 | — | — | 210.0 |
| Coolant | Soluble oil 8-12% |
| Chip Formation | Short-medium chips (spheroidised) |
| Tool Material | Carbide P30; TiAlN |
| Surface Finish | Ra 0.8-1.6 um |