EN steel grade S235J2 material VS a36 grade

The company's main steel plates have twelve types of steel products like boilers and pressure vessels, low-alloy high-strength steel EN steel grade S235J2 material, wear-resistant steel plates, corrosion-resistant steel plates, high-rise building structural steel plates, marine structural steel plates, alloy structural steel plates, mold steel plates, carbon structural steel plates, shipbuilding and steel plates for oil production platforms, composite steel plates, steel plates for oil and gas pipelines. We offer various steel grades, and more than 300 kinds of thickness specifications.

Advantages of EN steel grade S235J2 material, ordinary carbon killed steel plate: there is no gas in the steel plate, the impurity is relatively small, the stress is very uniform, and it has good welding performance. It is widely used in parts with high requirements. Disadvantages of ordinary carbon killed steel plate: the surface quality of the killed steel plate is not as good as that of boiling plates, there are concentrated shrinkage holes, and the killed steel plate price is more expensive.

The effect of nitrogen (N) on the properties of EN steel grade S235J2 material and so on steel is similar to that of carbon and phosphorus. With the increase of nitrogen content, the strength of steel can be significantly improved, especially the plasticity, especially toughness, and the weldability will be decreased, and the cold brittleness will be intensified. At the same time, aging tendency, cold brittleness and hot brittleness will be increased, which will damage the weldability and cold bending property of steel. Therefore, the nitrogen content in EN steel grade S235J2 material and so on steel should be reduced and limited as much as possible. Generally, nitrogen content should not be higher than 0.018%.

The correct choice of billet type, section shape, size and weight are of great significance to EN steel grade S235J2 material steel rolling production. Steel rolling production has certain technical requirements for raw materials, such as steel type, section shape, size, weight, and surface quality. The consideration of these technical requirements is necessary to ensure the quality of steel. It should also be specifically considered when determining and selecting the blank. The EN steel grade S235J2 material rolling method can be divided into cold rolling and hot rolling according to the rolling temperature.