Key Welding Precautions for S355J0WP Weathering Steel
100–150℃ (thickness-dependent) to prevent hydrogen-induced cracking.
<=250℃ to avoid excessive softening.
weathering-resistant fillers (e.g., AWS E7018-W, ER70S-3 with Cu/Cr).
Avoid mismatched fillers that compromise corrosion resistance.
Low-Hydrogen Practices
Bake electrodes (350–400℃) to remove moisture.
Shield welds from humidity (use MIG/GTAW with dry gas).
0.5–2.0 kJ/mm to prevent Cu segregation and porosity.
Avoid prolonged arc time on thin sections.
Post-Weld Considerations
Clean slag/spatter to ensure uniform patina formation.
Skip PWHT unless required for stress relief (thick sections).
Bevel thick plates (e.g., 60℃ V-groove) for full penetration.
and corrosion testing.
