S420M
Thermomechanically rolled fine-grain steel: 420 MPa yield up to 16 mm, 520–680 MPa tensile, low carbon for welding.
- Yield strength ReH
- ≥ 400MPaConfirmed16–40 mm
- Tensile strength Rm
- 520–680MPaConfirmed≤ 40 mm
- Elongation after fracture A
- ≥ 19%Corroborated
- Design yield strength fy
- 420MPaSingle source≤ 40 mm
- Design ultimate strength fu
- 520MPaSingle source≤ 40 mm
All values
Strength
Yield strength ReH
Upper yield strength guaranteed by the product standard (minimum).
| Condition | Value | Evidence |
|---|---|---|
| ≥ 420MPa | Confirmed | |
| ≥ 400MPa | Confirmed | |
| ≥ 390MPa | Confirmed | |
| ≥ 380MPa | Corroborated | |
| ≥ 370MPa | Corroborated | |
| ≥ 365MPa | Corroborated |
Tensile strength Rm
Ultimate tensile strength. Product standards give a range or a minimum.
| Condition | Value | Evidence |
|---|---|---|
| 520–680MPa | Confirmed | |
| 500–660MPa | Corroborated | |
| 480–640MPa | Single source | |
| 470–630MPa | Single source | |
| 460–620MPa | Single source |
Ductility
Elongation after fracture A
Minimum elongation; depends on gauge length and test direction.
| Condition | Value | Evidence |
|---|---|---|
| ≥ 19% | Corroborated |
Design values (Eurocode)
Design yield strength fy
Nominal value used in design calculations (before partial factors).
| Condition | Value | Evidence |
|---|---|---|
| 420MPa | Single source | |
| 390MPa | Single source |
Design ultimate strength fu
Nominal ultimate strength used in design calculations.
| Condition | Value | Evidence |
|---|---|---|
| 520MPa | Single source | |
| 500MPa | Single source |
Sources here are public pages that reproduce EN 10025-4:2019. For design and acceptance, the standard edition named in your specification and the inspection certificate (EN 10204 3.1) of the delivered product take precedence.