Austenitic decorative stainless steel pipe is widely used, and its usage is also the largest. Its characteristics are austenitic structure at room temperature does not undergo phase transformation, it can not be hardened by thermal external, but it can be changed by discussing cold addition. Commonly used heat treatment method is solid solution treatment.
Generally speaking, ferritic decorative stainless steel tube does not have transformation, it is a ferrite organization that does not undergo transformation at high temperature and room temperature. However, when the steel contains a certain amount of austenite-forming elements, such as carbon and ammonia, austenitic structure can be formed at high temperatures, this steel can not be strengthened by heat treatment, only by annealing to eliminate internal stresses and facilitate further surface treatment.
Martensitic decorative stainless steel pipe has a distinct phase transformation point, austenitic structure at high temperature, martensitic phase transformation occurs when cooling, transforming into a martensitic structure and hardening. Due to the high chromium content of this stainless steel, good hardenability, you can use many heat treatment methods, such as quenching and tempering.