SS400
Japan's general structural steel: 245 MPa yield up to 16 mm, 400–510 MPa tensile. Not intended for welded primary structures.
Compared with S235 on its equivalents table.
- Yield strength ReH
- ≥ 235MPaSingle source16–40 mm
- Tensile strength Rm
- 400–510MPaCorroborated
All values
Strength
Yield strength ReH
Upper yield strength guaranteed by the product standard (minimum).
| Condition | Value | Evidence |
|---|---|---|
| ≥ 245MPa | Corroborated | |
| ≥ 235MPa | Single source | |
| ≥ 215MPa | Single source |
Tensile strength Rm
Ultimate tensile strength. Product standards give a range or a minimum.
| Condition | Value | Evidence |
|---|---|---|
| 400–510MPa | Corroborated |
Ductility
Elongation after fracture A
Minimum elongation; depends on gauge length and test direction.
| Condition | Value | Evidence |
|---|---|---|
| ≥ 17% | Single source1 |
Listed as equivalent to
- S235 (EN 10025-2:2019) — Higher yield (245 MPa ≤ 16 mm) and tensile (400–510 MPa), but no impact test and almost no chemistry limits: not for welded primary structures.
Not yet verified for this grade
- Thickness limit of the > 40 mm band
- A second publisher for the thicker bands
Missing on purpose: a value appears here only once a public source states it.
Sources here are public pages that reproduce JIS G 3101. 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.