The steel plates for SA302GrC boilers must withstand different pressures and strengths due to the manufactured containers. Generally, the normal pressure is 314MPa or higher, and the working temperature is often between -20°C and 450°C. According to the working conditions and processing requirements of the vessel, the steel plate must have good cold bending and welding performance, good plasticity and toughness, and high temperature short-term strength or long-term strength performance.
A572 grade 55 high strength steel, low alloy high strength steel has good weldability. Welding is the most common method to construct engineering structure, so the steel used in engineering structure requires good welding performance. Low alloy high strength steel has low carbon content, low alloy element content and good plasticity, so it is not easy to produce quenching structure and crack in the weld area, and the addition of Ti, Nb, V can also inhibit the grain growth in the weld area. Therefore, most of the low alloy high strength steels have excellent welding performance and no heat treatment is required after welding.
As the thickness and hardness of A572 grade 55 high strength steel increase, the tendency to crack at the cutting edge increases. In order to prevent the A572 grade 55 high strength steel from cutting cracks, preheating should be carried out before A572 grade 55 high strength steel cutting. Special attention should be paid to preheating to make the entire A572 grade 55 high strength steel interface evenly heated to avoid local overheating in the area contacting the heat source. If the whole A572 grade 55 high strength steel cannot be preheated, the partial preheating method can be used instead.
Our company has been established for 20 years and has accumulated rich experience in steel products. At the same time, it is often exported to Southeast Asia, Africa, South America and other countries. So you can rest assured that our A572 grade 55 high strength steel products and our prices are very favorable. Because we have our own factory, there is no other cost, we can also carry out machining and so on.
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