In order to improve the corrosion resistance, galvanized steel tubes are galvanized by Ji'nan galvanized pipe. The galvanized steel pipe is divided into two kinds of hot dip galvanizing and electric steel, the hot galvanizing layer is thick and the cost of galvanizing is low, so the galvanized steel pipe is made.
1, carbon; the higher the carbon content, the higher the hardness of the steel, but the worse the plasticity and toughness of the steel.
2, sulfur; it is a harmful impurity in steel. High sulphur steel is brittle cracking when it is processed at high temperature. It is usually called thermal brittleness.
3, p; can make the plasticity and toughness of the steel decreased significantly, especially at low temperature is more serious, this phenomenon is called cold brittleness. In high-quality steel, to strictly control the sulfur and phosphorus, sulfur and phosphorus containing high in low carbon steels, can make the cutting easily broken, beneficial to the improvement of the steel machinability is the.
4, Mn; can improve the strength of steel, can weaken and eliminate the adverse effects of sulfur, and can improve the hardenability of steel, manganese content of high alloy steel has good wear resistance and other physical properties.
5, silicon; it can improve the hardness of the steel, but the plasticity and toughness decrease, the steel in the electric steel contains a certain amount of silicon, which can improve the soft magnetic properties.
6, tungsten, can improve the steel hardness and heat strength, and can improve the wear resistance of the steel.
7, chromium, can improve the hardenability and wear resistance of steel, and can improve the corrosion resistance and oxidation resistance of steel.
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