Sulfur comes from steelmaking ore and coke fuel. It is a harmful element in steel. Sulfur exists in steel in the form of iron sulfide (FeS), and FeS and Fe form a low melting point (985℃) compound.

Structural steel is one of the most important uses of hot rolled coil, the main uses include building steel structure, machinery industry, automobile, oil and gas and other industries.

Global stainless steel production is concentrated in Asia, the world's major stainless steel production has declined in 2022, and China is still the world's largest stainless steel producer.

The stainless steel industry is a strategic and basic industry in China, and it is of great significance to play the supporting role of stainless steel, a key functional material, and further promote the development of China's advanced equipment manufacturing industry and the transformation of energy to green and low-carbon.

J1 material is the most widely circulated material in the market, half of the users will be used in stainless steel door stamping, stainless steel products welding, shallow tensile products, round, elbow, crushing edge and so on are no problem, but not all steel plants are divided into J series, such as Lianzhongji origin is not divided, 201#LH represents the ordinary 201.

304 stainless steel is the world's most widely ordered stainless steel material grade. It is an austenitic SS variant containing 8% to 10.5% nickel, 18% to 20% chromium, and other elements such as carbon, manganese, and silicon.

Vector control mode is divided into vector control mode based on slip frequency control, vector control mode without speed sensor and vector control mode with speed sensor.

Because transformer are widely used in industry, there are many different types of transformer. Many single-phase and three-phase transformer have been developed for a wide range of applications.