Corten B
Data under reviewCorten B is the structural weathering grade, normally supplied to ASTM A588 chemistry: lower phosphorus than Corten A, with vanadium for strength in thicker welded construction. It is the bridge and heavy-structure member of the weathering family.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.19 |
| Si | 0.30–0.65 |
| Mn | 0.80–1.25 |
| P | ≤0.040 |
| S | ≤0.050 |
| Cr | 0.40–0.65 |
| Ni | ≤0.40 |
| Cu | 0.25–0.40 |
| V | 0.02–0.10 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Yield strength | ≥345 MPa |
| Tensile strength | ≥485 MPa |
| Density | 7.85 g/cm³ |
Heat treatment
Supplied as-rolled or normalized; low-phosphorus chemistry suits welded structural sections and heavier plate.
Equivalent grades
| Standard | Designation |
|---|---|
| din | S355J2W type (EN 10025-5, near) |
| aisi | A588 (chemistry basis) |
| gb | Q355NH (near) |
Compare side by side: Corten B vs ASTM A588 · Corten B vs Corten A
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Bridges, transmission towers, rail wagons, heavy outdoor structures.
Processing: Weldable with standard HSLA practice using weathering-matched filler; the usual choice over Corten A above ~10 mm and for primary structure.
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Ask for a quotationVisit NasteelSource: ASTM A588 published ranges (Corten B supply basis) · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.