Difference between carbon steel pipe and stainless steel pipe

The differences between stainless steel pipes and carbon steel pipes are mainly reflected in the following points:
1. 304 stainless steel pipes produce work hardening during cold working. For example, they have anisotropy when bent, that is, their transverse and longitudinal properties are different. The increased strength resulting from cold working can be utilized, 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.
2. The shape of the stress/strain curve is different. The elastic limit of 304 stainless steel pipe 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 the yield stress value of medium carbon steel.
3. 304 stainless steel pipe has no yield point. It is usually expressed as ó0.2. The yield stress is considered to be the equivalent value.
The design of 304 stainless steel pipe welding joints is similar to that of ordinary steel welding joints. The design of the welded joint selected must provide the appropriate strength and service life of the weld, while at the same time keeping the welding cost low. Butt welds used in corrosive services shall be full fusion welds. It is not necessary for the fillet weld to be fully penetrated. It only needs to be welded on both sides or both ends to seal the gaps where liquid accumulation causes crevice corrosion.