SM570
Data verifiedSM570 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.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.18 |
| Si | ≤0.55 |
| Mn | ≤1.70 |
| P | ≤0.035 |
| S | ≤0.035 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Yield strength | ≥460 MPa (≤16 mm) |
| Tensile strength | 570–720 MPa |
| Impact toughness | Impact-tested grade under JIS G3106 |
| Density | 7.85 g/cm³ |
Heat treatment
Hot rolled as supplied; TMCP or normalized delivery can be agreed for thicker plate. No hardening treatment is applied.
Equivalent grades
| Standard | Designation |
|---|---|
| din | S460ML (near) |
| aisi | A572 Gr.65 (near) |
| jis | SM570 (JIS G3106) |
| gb | Q460C (near) |
Compare side by side: SM570 vs Q460C · SM570 vs S460ML
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Long-span bridges, high-rise building columns, crane booms, hydraulic supports, offshore and heavy fabricated structures.
Processing: Weldable with low-hydrogen consumables and controlled heat input; preheat rises with thickness and restraint. Flame cutting and cold forming need the tighter radii of a 570 MPa class plate.
FAQ
- SM570 vs SM520?
- One strength class apart: SM520 tensile is 520–640 MPa with yield ≥365 MPa, SM570 is 570–720 MPa with yield ≥460 MPa. SM570 saves more weight but demands stricter welding control and is stocked in fewer thicknesses.
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Ask for a quotationVisit NasteelSource: JIS G3106 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.