The iron oxide defects on the surface of S890 material equivalent

Steel material has an irreplaceable role in many projects, especially in building construction, bridge cofferdams, road construction, foundation pit support, garden engineering, excavator paving, subgrade engineering and other projects. Therefore, the quality of S890 material equivalent steel material can not be ignored, so how should customers identify the authenticity of steel when choosing steel materials? Today we would like to analyze it together. So that it can help you to purchase satisfied steel materials in the future.

The effect of nitrogen (N) on the properties of S890 material equivalent 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 S890 material equivalent and so on steel should be reduced and limited as much as possible. Generally, nitrogen content should not be higher than 0.018%.

As the thickness and hardness of S890 material equivalent increase, the tendency to crack at the cutting edge increases. In order to prevent the S890 material equivalent from cutting cracks, preheating should be carried out before S890 material equivalent cutting. Special attention should be paid to preheating to make the entire S890 material equivalent interface evenly heated to avoid local overheating in the area contacting the heat source. If the whole S890 material equivalent cannot be preheated, the partial preheating method can be used instead.

After-sales service team is a key department to test the steel quality. Product quality is always the foundation of our survival and development. The company's full inspection from raw materials to finished products; and implements standardized, scientific, and strict internal quality control and management systems in accordance with the process flow during the production process; products can only leave the factory if qualified, and follow-up problem solving systems are implemented in after-sales services to guarantee the customers’ interest.