How does the crack on the surface of BP440 bulletproof material cause

The whole plant covers an area of 18,480 square meters, a workshop area of 9,500 square meters, and a final assembly workshop of 4,300 square meters; fixed assets are 25.50 million yuan. The company has BP440 bulletproof material strong technical force, complete quality assurance system sophisticated tooling equipment and advanced technology. It can provide high efficiency professional equipment and BP440 bulletproof material pressure vessels for domestic and foreign chemical, petroleum, chemical, metallurgical, pharmaceutical, fertilizer, textile, and environmental protection industries.

The automobile structure BP440 bulletproof material steel coil is one of our featured products. The main standards for automobile structure steel coil are JIS G3113, EN 10149-2, Q-BQB 310-2009, SEW092, DIN 17102, etc. The automobile structure steel coil is always pickled. For the steel coil, our processing center provide slitting, cutting etc. services. Our main automobile structure steel grades are SAPH440, S355MC, S500MC, S700MC, QStE380TM, QStE500TM, BP440 bulletproof material etc.

Special boiler steel is derived from carbon structural steel. The chemical composition of boiler steel is basically the same as that of high-quality carbon structural steel of the same level, but the BP440 bulletproof material steel mechanical property requirements are more strict, especially for impact toughness. And the aging sensitivity is required to be small. The boiler steel should be deoxidized and the non-metallic inclusions should be removed during smelting. The structure should be uniform. The grain size should be controlled in 3-7 grades. The defects such as interlayer, shrinkage, porosity and porosity should be minimized.

After twenty years of efforts, the company has completed the steel plates production process and complete testing equipment from smelting, rolling, drawing, heat treatment to BP440 bulletproof material full material. Large-scale production, intensive, and unremitting research and development and innovation make our products maintain long-term vitality. In early 2008, the company established the Ministry of foreign trade, and our BP440 bulletproof material steel plate products are now exported to the South Asia, the Middle East, Europe and the United States.

According to GB 11251 technical standard, the chemical composition of 40Cr structural steel plate is as follow: Carbon content is 0.37-0.44 %, Silicon content is 0.17-0.37%, Manganese content is 0.50-0.80%, Chrome content is 0.80-1.10%. 40Cr steel is usually in shape of 40Cr steel plates and bars. BP440 bulletproof material, GB 11251 is for 40Cr structural steel plate with thickness range of 4-30mm. The tensile strength of 40Cr structural steel plate is 550-800Mpa. And its min. Elongation is 16%.

The company adopts one-to-one fast service and has formed a professional after-sales service team to deal with various problems reflected by customers as soon as possible. At the same time, a traceable product traceability system has been established. It has always been placed at an important core position to resolve customer worries. Our steel BP440 bulletproof material products are always committed to “quality issues, life-long replacement”, which is the embodiment of our comprehensive service.

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