1. Tungsten can improve the redness and thermal strength of the spiral steel pipe, and can improve the wear resistance of the spiral steel pipe.
2. Silicon; it can improve the hardness of the spiral steel pipe, but the plasticity and toughness are decreased. The spiral steel pipes used in electrical artists contain a certain amount of silicon, which can improve soft magnetic performance.
3. Chromium; can improve the hardening and abrasion resistance of the spiral steel pipe, and improve the corrosion resistance and antioxidant effect of the spiral steel pipe. In order to improve the corrosion resistance of the anticorrosive spiral steel pipe, the general anticorrosive spiral steel pipe (black tube) Galvanized.
4. Sulfur; it is a harmful debris in the spiral steel pipe. The spiral steel pipes with high sulfur -containing steel pipes are easy to crack when pressure processing at high temperature.
5. Carbon; the higher the carbon content, the higher the rigidity, but the worse its plasticity and toughness.
6. Manganese; can improve the strength of the spiral steel pipe, weaken and eliminate the adverse effects of sulfur, and improve the quenchability of the spiral steel pipe. The high -alloy spiral steel pipe (high manganese spiral steel pipe) with high manganese content is good Abrasion resistance and other physical properties.
7, phosphorus; the plasticity and toughness of the spiral steel pipes decrease significantly, especially at low temperature. This phenomenon is called cold and brittleness. In high -quality spiral steel pipes, sulfur and phosphorus should be strictly controlled. It contains high sulfur and phosphorus in low -carbon spiral steel pipes, which can make it easy to cut, and it is beneficial to improving the cutability of the spiral steel pipe.
