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The weld quality of S355J2W weathering steel directly affects the safety and durability of engineering structures; therefore, the welding process must balance the preservation of both weathering resistance and mechanical properties. This paper analyzes the key points of the welding process for S355J2W based on its material properties, examines the application effectiveness of welding methods such as handheld laser cladding, MAG welding, and laser-MAG hybrid welding, proposes quality control measures during the welding process to address welding defects, and provides technical guidance for practical welding operations.
The equivalent grades for S355J2W steel include: ASTM A588 Grade B, GB/T Q355NH or Q355GNH, JIS G3125 SPA-H, and Corten B.
S355J0W and S355J2W are both weathering structural steels that conform to the European standard EN 10025-5:2019. They have the same strength, weather resistance and weldability. The core difference is in the low temperature impact toughness level (J0 is 0℃, J2 is -20℃).
EN 10025-5 S355J2WP is a low-alloy high-strength weather-resistant structural steel under the European standard (EN), offering excellent atmospheric corrosion resistance. Also known as weathering steel or Corten steel, it is commonly used in structures such as buildings, bridges, railway vehicles, and containers that are exposed to outdoor atmospheric environments over the long term. This material significantly extends service life, reduces lifecycle maintenance costs, and provides a distinctive
