The related factors of A514 grade B QT steel plate steel plate cutting are mainly steel plate material, steel plate specific use and steel plate cutting requirements, so it can be said that there are many related factors. Different processing methods, such as finish machining and rough machining, choose different A514 grade B QT steel plate steel plate cutting methods. Wire cutting or plasma cutting is used for finishing and flame cutting is used for rough machining. Therefore, it can be concluded that the steel plate cutting methods selected under different processing methods are different.
Composition characteristics of low alloy structural steel, A514 grade B QT steel plate: (1) Low carbon: the carbon content of low alloy structural steel is less than 0.20% due to the high requirements of toughness, weldability and cold formability. (2) The alloy elements such as manganese are added. (3) The addition of Nb, Ti or V and other auxiliary elements: a small amount of Nb, Ti or V forms fine carbides or carbonitrides in the steel, which is beneficial to obtain fine ferrite grains and improve the strength and toughness of low alloy structural steel. In addition, adding a small amount of copper (≤ 0.4%) and phosphorus (about 0.1%) can improve the corrosion resistance. The addition of a small amount of rare earth elements can remove sulfur and gas, purify the steel, and improve the toughness and process performance of low alloy structural steel.
The rise and fall of A514 grade B QT steel plate, steel pipe price will be affected by many factors, such as market demand. If the construction of real estate industry, basic road construction and so on industries is booming, the sales volume of steel pipes will be very good, and the market supply will gradually increase. The market demand has a very important guiding significance for A514 grade B QT steel plate, steel pipe manufacturers, dealers and agents in many regions.
According to the data released by the Japan iron and Steel Union (JISF), the export volume of Japanese steel in the second quarter of 2020 A514 grade B QT steel plate is about 4.959 million tons, a year-on-year decrease of 14.2%; the export volume in the first half of 2020 is about 11.07 million tons, with a year-on-year growth of 1.8%. It has been revealed that the year-on-year increase in export volume does not mean that Japan's export A514 grade B QT steel plate situation of Pugang is better in the first half of the year, but only because the base number of the same period last year is too low.
