ASTM A588 Grade B equal grade

International Equivalents for ASTM A588 Grade B

ASTM A588 Grade B is a high-strength low-alloy (HSLA) weathering steel with enhanced atmospheric corrosion resistance, forming a protective patina. It is primarily used in structural applications like bridges and buildings. While exact equivalents depend on regional standards and specific requirements (e.g., toughness, thickness), the grades below are the closest matches based on chemical composition, mechanical properties, and corrosion performance.

Note that substitutions should be verified against project specs, as minor differences in elements like phosphorus or vanadium can affect weldability or low-temperature impact.

Key Considerations

• Chemical Alignment: All equivalents feature Cu (0.20–0.55%), Cr (0.40–1.25%), and Ni (up to 0.65%) for rust stabilization, with A588 Gr. B's lower P (≤0.04%) improving ductility over higher-P grades like Corten A.
• Mechanical Match: Minimum yield 345 MPa (50 ksi), tensile 485 MPa (70 ksi), elongation ≥19%. Equivalents like S355J2WP meet or exceed these.
• Availability: EN and JIS grades are widely available globally; consult mills (e.g., ArcelorMittal, Nippon Steel) for certifications.
• Non-Equivalents: Avoid plain carbon steels (e.g., ASTM A36) or non-weathering HSLA (e.g., A572 Gr. 50) without coatings.

For precise cross-referencing, refer to ISO 630 or supplier data sheets. If you have a specific region or application in mind, I can refine this!