Composition and property differences between S355J2W and S355J2WP steel plates

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

S355J2WP steel means: S355J2WP is a high phosphorus corrosion resistant structural steel. S means structural steel, 355 is a 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.

Introduction to S355J2W and S355J2WP steel plate:
S355J2W belongs to fine grain steel. S355J2W steel plate is an improved atmospheric corrosion resistant structural steel. S355J2W steel plate is widely used in high-speed railway bogies, welding, bolting and riveting parts. S355J2W enhances the atmospheric corrosion resistance ability applied at ambient temperature. Some specific alloy elements, such as P, Cu, Cr, Ni, Mo, are added to achieve corrosion resistance, forming a protective oxide layer on the metal surface under various climatic conditions.

It is mainly divided into S235J0W, S235J2W, S355J0WP, S355J2WP, S355J0W, S355J2W and S355K2W. When the steel plate is marked with "+N or+AR", the product is forcibly specified and delivered under the condition of+N or+AR. The symbol "+N or+AR" will be added to the steel name and steel number. For example: when the specified minimum yield strength is 355MPa MPa under the environment, the minimum value of 0 impact energy is 27J Joule (J0) and the improved atmospheric corrosion resistance (W) under standard rolling delivery conditions (S): steel plate EN10025-5-S355J0W+N; Or steel plate EN10025-5-1.8959+N (or+AR).