United States · SAE
52100
SAE J 404:2009 — SAE J 404
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.93 | 1.05 | ||
| Cr | 1.35 | 1.6 | ||
| Cu | 0.35 | |||
| Mn | 0.25 | 0.45 | ||
| Mo | 0.06 | |||
| Ni | 0.25 | |||
| P | 0.025 | For Flat Rolled products Pmax.=0.03% and for Long products Pmax.=0.04% | For Flat Rolled products Pmax.=0.03% and for Long products Pmax.=0.04% | |
| Pb | 0.15 | 0.35 | When required | When required |
| S | 0.025 | For Flat Rolled products Smax.=0.035% and for Long products Smax.=0.05% | For Flat Rolled products Smax.=0.035% and for Long products Smax.=0.05% | |
| Si | 0.15 | 0.35 |
Fatigue
1.Heat treated; T: 20°C; -
| Item | Detail |
|---|---|
| Product | Heat treated |
| Experiment | T: 20°C |
| Specimen |
| Property | Value |
|---|---|
| Elastic modulus (GPa) | 207.0 |
| Yield strength (MPa) | 1922.0 |
| Tensile strength (MPa) | 2912.0 |
| Reduction of area (%) | 11.2 |
| Hardness (HB) | 519.0 |
| No. | Cyclic strain-hardening exponent n′ | Cyclic strength coefficient K′ (MPa) | Fatigue strength coefficient σ′f (MPa) | Fatigue strength exponent b | Fatigue ductility coefficient ε′f | Fatigue ductility exponent c |
|---|---|---|---|---|---|---|
| 1 | 0.1500 | 3348 | 2709.0 | -0.096 | 0.243 | -0.642 |
| No. | Stress (MPa) | Cycles |
|---|---|---|
| 1 | 673 | 2E6 |
Heat treatment
| Type | 1 |
|---|---|
| Heat-treatment curve | Hardness-Tempering |
| Heat-treatment curve | TTT |
| Heat-treatment curve | CCT |