SM570
KRExact matchKS · KS D3515:2019
Family of high-strength low-alloy (HSLA) structural steels, produced by microalloying (Nb, V, Ti) and controlled or thermomechanical rolling. Used to reduce structural weight in bridges, cranes, high-rise buildings and mobile equipment where the strength-to-weight ratio is critical.
| Grade | Region | Standard | Re (MPa) | Rm (MPa) | Delta |
|---|---|---|---|---|---|
| SM570 | KR | KS D3515:2019 | 460 | 570–720 | reference |
| S460M | EU | EN 10025-4:2019 | 460 | 540–720 | 0% |
| SM570 | JP | JIS G3106:2020 | 460 | 570–720 | 0% |
| S420 | EU | EN 10025-2:2019 | 420 | 500–660 | -9% |
| A572 Grade 60 | US | ASTM A572/A572M | 414 | ≥517 | -10% |
| Neighboring grades — different strength | |||||
| S355J2 | EU | EN 10025-2:2019 | 355 | 470–630 | -23% |
| A572 Grade 50 | US | ASTM A572/A572M | 345 | ≥450 | -25% |
| Grade | C | Mn | Si | P | S | Cu | CEV |
|---|---|---|---|---|---|---|---|
| SM570 | ≤0.18 | ≤1.6 | ≤0.55 | ≤0.035 | ≤0.035 | — | — |
| S460M | 0.1–0.14 | — | — | — | — | — | 0.42–0.46 |
| SM570 | ≤0.18 | ≤1.7 | ≤0.55 | ≤0.035 | ≤0.035 | — | — |
| S420 | ≤0.2 | ≤1.7 | ≤0.6 | ≤0.03 | ≤0.03 | — | — |
| A572 Grade 60 | ≤0.26 | ≤1.35 | ≤0.4 | ≤0.03 | ≤0.03 | — | — |
| S355J2 | ≤0.2 | ≤1.6 | ≤0.55 | ≤0.03 | ≤0.03 | ≤0.55 | — |
| A572 Grade 50 | ≤0.23 | ≤1.35 | 0.15–0.4 | ≤0.03 | ≤0.03 | — | — |
Note: KS D3515 is harmonized with JIS G3106 (same SM570 designation, near-identical composition and mechanical properties, cross-checked directly against an official Korean data sheet). Mechanical properties could not be extracted from the same Korean document and are taken from the structurally identical JIS equivalent.
Values compiled from public sources for guidance only — always verify against the official standard before use in design or fabrication.