SM490
Japanese welded-structure steel; the 490 is minimum tensile strength, yield is 325 MPa.
SM490ANo impact requirementSM490BImpact tested (energy and temperature: see JIS G 3106)SM490CImpact tested, higher energy (see JIS G 3106)
Compared with S355 on its equivalents table.
- Yield strength ReH
- ≥ 315MPaSingle source16–40 mm
- Tensile strength Rm
- 490–610MPaConfirmed
All values
Strength
Yield strength ReH
Upper yield strength guaranteed by the product standard (minimum).
| Condition | Value | Evidence |
|---|---|---|
| ≥ 325MPa | Corroborated1 | |
| ≥ 315MPa | Single source |
Tensile strength Rm
Ultimate tensile strength. Product standards give a range or a minimum.
| Condition | Value | Evidence |
|---|---|---|
| 490–610MPa | Confirmed |
Listed as equivalent to
- S355 (EN 10025-2:2019) — Usually listed as the JIS equivalent, but its guaranteed yield is 325 MPa — 30 MPa (8 %) below S355. Fine as a tensile-class match, not for yield-governed design.
Not yet verified for this grade
- Yield above 40 mm
- Impact energies for B and C (from JIS G 3106 itself)
Missing on purpose: a value appears here only once a public source states it.
Sources here are public pages that reproduce JIS G 3106. 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.