What is the S355J0W plate rolling process?

S355J0W plate rolling process
1. Normalizing rolling
The rolling process of post-deformation in a certain temperature range results in a material condition equal to that obtained after normalizing, so the specified value of mechanical properties remains after normalizing.
The short form of these delivery terms is +N.
2. Rolling
The delivery conditions exclude any specified rolling and heat treatment conditions.
The short form in these delivery conditions is +AR.
3. Improved atmospheric corrosion resistant steel
A certain amount of alloying elements such as P, Cu, Cr, Ni, Mo, etc. are added to the steel in order to increase the resistance to air corrosion. Under the influence of climatic conditions, an automatic protective oxide is formed on the base metal.

Applicable environment of S355J0W weathering steel

The anti-corrosion effect of the automatic protective oxide layer is related to natural factors and special classification and the concentration of alloy elements in it. The resistance to atmospheric corrosion depends on the self-protective oxide layer based on the base metal during periods of continuous dry and humid weather conditions. Environmental and other conditions mainly provide protection for the location of the structure.
When the specific chemical substance content is in the air, the structure is in contact with water for a long time, is exposed to moisture or is used in the marine atmosphere, it is meaningful and necessary to recommend conventional surface protection. Under comparable conditions, steel with improved atmospheric corrosion-resistant paint has lower corrosion infectivity than conventional structural steel. The surface of the structure that is not exposed to the elements may be affected by aggregation and concentration, and should be properly ventilated. In addition, proper surface protection is required. The scope of these factors that mainly depend on climatic conditions in a broad sense and the description of the structure do not allow any statement that is roughly valid during the corrosion process, and the user should therefore consider the appropriate protection of the steel manufacturer in the application of individual products.

S355J0W weathering steel features and uses

The steel specified by EN10025-5 European standard is suitable for welding, bolting and riveting parts, and these parts have good resistance to atmospheric window corrosion at ambient temperature. S355J0W steel is mainly used for steel structures exposed to the atmosphere for a long time, such as railways, vehicles, bridges, and towers. It is used to manufacture structural parts such as containers, railway vehicles, oil derricks, seaport buildings, oil production platforms, and containers containing hydrogen sulfide corrosive medium in chemical petroleum equipment.