Grades
C45
Quench and temper steel · EN 1.0503
Medium-carbon steel that hardens by quenching and tempering. Standard for shafts, gears and pins.
Needs preheat for welding; not a choice for welded structures.
Chemical composition
| Element | % |
|---|---|
| C | 0,42 – 0,50 |
| Si | max 0,40 |
| Mn | 0,50 – 0,80 |
| P | max 0,030 |
| S | max 0,035 |
Mechanical properties
| Property | Value |
|---|---|
| Rp0,2 (MPa) | min 370 |
| Rm (MPa) | 630 – 780 |
| A (%) | min 17 |
| HB | max 255 |
| Density (g/cm³) | 7,85 |
| Magnetic | Yes |
Values are published EN 10088 ranges. The real figure for an order is on that heat certificate.