What are the common materials of galvanized steel pipes

First, what are the materials of galvanized steel pipes?

There are many different materials for pipes, and the uses of pipes of different materials are also different. For example, galvanized steel pipes are often used to transport gas, heating, etc. So what are the materials of galvanized steel pipes?

Galvanized pipes are also called galvanized steel pipes. It can be seen that its main material is steel, which is a pipe fitting obtained by galvanizing steel. Its representative materials are carbon steel 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo and many other materials. Since the surface of galvanized steel pipes has been galvanized, it can effectively prevent corrosion and rust on steel, helping to extend the service life of steel.

Second, what material is good for galvanized steel pipe fittings

Galvanized steel pipe fittings have many materials, but when choosing materials, carbon structural steel is generally preferred, because galvanizing is mainly to improve the corrosion resistance of steel pipes, while other materials have better corrosion resistance, and some are not suitable for galvanized surface treatment. The material requirements for galvanized steel pipes are mainly:

1. Low carbon: The higher the carbon content of the steel pipe, the higher the hardness of the steel, but the worse its plasticity and toughness. Due to the high requirements for toughness, weldability, and forming performance of galvanized steel pipes, the carbon content is generally required to be no more than 0.2%.

2. Add alloy elements mainly composed of manganese.

3. Add auxiliary elements such as niobium, titanium, or vanadium: A small amount of niobium, titanium or vanadium forms fine carbides or carbonitrides in steel, which is conducive to obtaining fine ferrite grains and improving the strength and toughness of steel. In addition, adding a small amount of copper (≤0.4%) and phosphorus (about 0.1%) can improve the corrosion resistance of galvanized steel pipes.

4. Adding a small amount of rare earth elements can desulfurize and degas, purify the steel, and improve toughness and process performance.