Meaning of S355J2W and S355J2WP steel

S355J2W steel meaning: S is structural steel, 355 is the yield strength of 355MPa, J2 requires -20℃ impact, the letter W indicates that the steel has the ability to resist atmospheric corrosion.

S355J2WP steel meaning: S355J2WP is high phosphorus corrosion resistant structural steel. S is structural steel, 355 is the yield strength of 355MPa, J2 requires -20℃ impact, the letter W indicates that the steel has the ability to resist atmospheric corrosion, and P is the chemical element phosphorus.

Corten steel S355J2W is a fine-grained steel, S355J2W steel is an improved atmospheric corrosion-resistant structural steel, S355J2W is widely used in high-speed rail bogies, welding, bolting and riveting parts, S355J2W enhances the atmospheric corrosion resistance applied at ambient temperature. Some specific alloying elements, such as P, Cu, Cr, Ni, Mo, etc., are added to achieve the anti-corrosion properties to form a protective oxide layer on the metal surface under various climatic conditions.