The difference between the so-called stainless steel seamless steel pipe and the carbon steel seamless steel pipe mainly refers to the difference in design rules between stainless steel and carbon steel, that is, the design rules of the two steels are not common.


Stainless steel design rules cannot be used for carbon steel because there are three fundamental differences between stainless steel and carbon seamless steel tubes.
First, the cold-worked stainless steel is work hardened, such as anisotropic when bent, that is, the lateral and longitudinal properties are different. The increased strength can be utilized by cold working, but if the bending area is less than the total area and the amount of increase is negligible, the increase in strength will increase the safety factor to some extent. under these circumstances,


Second, for different shapes of stress/strain curves, the elastic limit of stainless steel is about 50% of the yield stress. From the minimum value, the yield stress value is lower than the yield stress value of medium carbon steel. under these circumstances,


Third, stainless steel has no yield point, usually expressed as _0.2, and the yield stress is considered equivalent.