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Three differences between stainless steel seamless steel pipe and carbon steel seamless steel pipe

The so-called difference between stainless steel seamless steel pipe and carbon steel seamless steel pipe mainly refers to the difference in design rules between stainless steel and carbon steel, that is to say, the design rules of these two kinds of steel are not universal. These differences are summarized as follows:

The design rules for stainless steel cannot be used for carbon steel because there are 3 fundamental differences between stainless steel and carbon steel:

First, stainless steel undergoes work hardening during cold working, for example, it has anisotropy when bent, that is, the transverse and longitudinal properties are different. The increased strength by cold working can be used, but if the bending area is small compared to the total area and this increase is ignored, the increased strength can improve the safety factor to a certain extent.

Second, the shape of the stress/strain curve is different. The elastic limit of stainless steel is about 50% of the yield stress. As far as the minimum value specified in the standard is concerned, the yield stress value is lower than that of medium carbon steel.

Third, stainless steel has no yield point. Usually, the yield stress is expressed as an equivalent value by รณ0.2.