SM570 vs S460ML
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
SM570
Structural & HSLA Steel
SM570 is the highest-strength grade of JIS G3106 rolled steel for welded structures: tensile 570–720 MPa with yield from 460 MPa, from a lean C-Mn chemistry kept weldable by carbon-equivalent control. It is the JIS counterpart class to GB Q460 and EN S460 plate for weight-critical welded construction.
Standards: DIN S460ML (near) · AISI A572 Gr.65 (near) · JIS SM570 (JIS G3106) · GB Q460C (near)
S460ML
Structural & HSLA Steel
S460ML is a thermomechanically rolled fine-grain steel to EN 10025-4 with a 460 MPa yield and impact toughness guaranteed to −50 °C. TMCP processing gives this strength at very low carbon, so weldability stays excellent for a 460-class steel.
Standards: DIN 1.8838 (S460ML) · AISI A572 Gr.65 (near) · GB Q460 class (near)
Chemical composition compared (%)
| Element | SM570 | S460ML |
|---|---|---|
| C | ≤0.18 | ≤0.16 |
| Si | ≤0.55 | ≤0.60 |
| Mn | ≤1.70 | ≤1.70 |
| P | ≤0.035 | ≤0.025 |
| S | ≤0.035 | ≤0.020 |
| Nb | — | ≤0.05 |
| V | — | ≤0.12 |
| Ni | — | ≤0.80 |
Properties compared
| Property | SM570 | S460ML |
|---|---|---|
| Yield strength | ≥460 MPa (≤16 mm) | ≥460 MPa (≤16 mm) |
| Tensile strength | 570–720 MPa | 500–660 MPa |
| Impact toughness | Impact-tested grade under JIS G3106 | — |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
| Impact | — | ML: 27 J at −50 °C |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: SM570 · S460ML. Substitution decisions for certified parts stay with the design authority.