S355J0WP chemical composition, S355J0WP mechanical property

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S355J0WP is a structural weathering steel which is also referred to as atmospheric corrosion resistant steel. The main alloying elements are chromium nickel and copper with added phosphorous which gives it excellent self protecting qualities. As the steel reacts with elements in the atmosphere, the material forms a layer of rust over time which in essence protects the steel from corrosion.
S355J0WP chemical composition:
The steel shall contain following elements: C: 0.12%, SI: 0.75%, Mn: 1.0%, P:0.06-0.15%, S: 0.035%, Cu：0.25-0.55%，Cr: 0.30-1.25%, N:0.009%, CEV:0.52%.
For long products the P and S content can be 0.005% higher
The steels may show a Ni content of max. 0,65 %
The max. value for nitrogen does not apply if the chemical composition shows a minimum total Al   content of 0,020 % or if sufficient other N binding elements are present. The N binding elements shall be mentioned in the inspection document
S355J0WP mechanical property:
The S235J2W grades have yield strength of"335"or"345"MPa, and ultimate tensile strength of"470-630"or"510-680"MPa. The fracture elongation of this steel is 20%.

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