How to distinguish carbon steel pipe and stainless steel welded pipe? Stainless acid‑resistant steel is referred to as stainless steel welded pipe. It is composed of stainless steel and acid‑resistant steel. In short, the steel that can resist atmospheric corrosion is called stainless steel, while the steel that can resist chemical medium corrosion it is called acid‑resistant steel. Generally speaking, steel with a content of Wcr greater than 12% has the characteristics of stainless steel.

Carbon steel is a steel that has not artificially added other alloying elements except C. Of course, C is also controlled to a certain extent, and its hardness is greater than that of pure iron. Generally, it does not have any corrosion resistance.

The difference between stainless steel welded pipe and carbon steel is mainly to see whether there are alloying elements and whether it has the ability to resist corrosion. If you want to test quickly, you need to detect the metal elements through the instrument to identify whether it is a stainless steel pipe.