Seamless steel tubes is a kind of strip steel with a hollow section and no surrounding joint, and they are widely used in industrial field. Seamless steel pipe with hollow section can be used as pipelines conveying fluid, such as conveying oil, natural gas, coal gas, water and some solid materials. Compared with solid steel, when with the same torsional strength, the weight of seamless steel pipe is light, so it is a kind of economic section steel. They are widely used in the manufacture of structural parts and mechanical parts, such as the oil drill pipe, automobile transmission shaft, the bicycle frame and scaffold. Manufacturing circular parts such as rolling bearing ferrule with seamless steel tube can improve the utilization rate of material, simplify the manufacturing process, and save the material and working hours. And seamless steel pipes are also the indispensable material of all kinds of conventional weapons, such as the barrel and so on. Return

About Channel - the knowledge you may not know is that the channel is a long steel with a groove shaped section. Section steel with groove shape. Channel steel is a carbon structural steel for construction and machinery, and it is a kind of steel with complex section, and its section shape is groove. The raw material billet of channel steel is carbon bound steel or low alloy steel billet with carbon content less than 0.25%. The finished channel steel is delivered in hot-working forming, normalizing or hot rolling condition.

Adding chromium or nickel to iron will form a thin, hard-to-action film on the iron, covering the surface. This hard-to-act film is an oxide film.It will cover the steel surface tightly, even if the steel surface is in contact with oxygen in the air, there will be no reaction.In other words, this layer is a dense film formed by oxide, which insulates oxygen.Sometimes different elements such as molybdenum are added according to different uses.

Silicon steel sheet is the material which is blanked or cut with unoriented or oriented silicon steel coil according to the desired core size. The English name of oriented or unoriented silicon steel coils is silicon steel sheets, which is a kind of ferrosilicon soft magnetic alloy with very low carbon content. Generally, the silicon content is 0.5 ~ 4.5%. According to the direction of the grain, it can be divided into two categories: oriented and unoriented. Generally, the higher the magnetic sensation, the lower the iron damage. The higher the grade of silicon steel, the better the material.

Stainless steel coil can be divided into cold rolled stainless steel coil and hot rolled stainless steel coil according to different production processes.

Last week, the national scrap steel market was relatively strong as a whole. Jiangsu Shagang’s scrap steel purchase price was raised twice in a week, accumulatively rising by 200 yuan/ton. Although the price after the increase was not higher than the local market, it was a lagging increase operation. There is still a big positive push. During the week, except for some areas where prices fluctuated due to the epidemic, they basically maintained a strong upward trend. With the strengthening of prices, the arrivals of steel mills have significantly decreased, the sentiment of suppliers’ shipments has weakened, and the decline in scrap steel inventories of steel mills has expanded. At the same time, the market reflects that the current volume of raw material purchases has decreased significantly compared with previous years, regardless of whether construction sites are scrapped or scrapped. Or industrial waste has declined to varying degrees, its own inventory is low, and the ability of market prices to withstand pressure has increased. At the same time, as the overall price of scrap steel increased more than the thread last week, the profits of electric furnace plants shrank again, which had a greater inhibitory effect on the market outlook....