S50C steel characteristics: the carbon content of the steel (mass fraction, %) ≥ 0.4, excellent wear resistance, reduced ductility, easy to deform and crack after quenching, so quenching is extremely important, and it must be quenched after cutting and tempering to avoid tempering brittleness. By implementing spheroidizing treatment, the cutting performance of this type of carbon steel A588 grade B structural steel plate can be improved. The steel is usually used after tempering to a hardness of 19~22HRC to increase its cutting performance.
The main raw material of A588 grade B structural steel plate, hot rolling coil is billet. After heating the billet, the strip made from the coarse and fine rolling mill is cooled to a certain temperature by specific cooling, and then the cooled steel strip is made into rolled steel strip by coiler. But generally, according to the buyer's demand, the manufacturer can further process the cooled steel strip into steel plate or flat coil and other products.
Seamless steel pipe refers to the steel pipe made of a whole piece of metal without joints on the surface. According to the production method, it can be divided into hot rolling tube, cold rolling tube, cold drawing tube, A588 grade B structural steel plate, extrusion tube and spinning tube. According to the shape of the section, it can be divided into two types: circular and irregular. The seamless tube has a maximum diameter of 650 mm (expanding tube) and a minimum diameter of 0.3 mm (capillary tube), which can be divided into thick walled tube and thin walled tube according to the thickness.
The data shows that Southeast Asia is the main A588 grade B structural steel plate and so on steel export region of China, and the steel export volume of Asia in 2019 is 37.198 million tons; that of North America and South America is 4.0678 million tons, and that of Europe is 1.1358 million tons. According to the latest epidemic data, South Korea and Japan are the most affected countries in Southeast Asia. However, the growth rate of the number of confirmed cases slowed down significantly, while the situation of the epidemic in Italy, a major European steel export country, was still severe, with the number of confirmed cases exceeding 53000. Therefore, the recovery speed of European market is slower than that of Southeast Asia.
