1. The first class material can make sure the stability and rust corrosion resistance of tubes . They are good for tube bending, flaring. The surface quality such as sand hole, pitting can be controlled. The tubes make by first material can be use for sanitary products and high class handrail tubes.
2. For the recycle material . The chemical position Ni, Cr is unstable and relative lower, Mechanical properties can't be guarantee. The surface issues like peeling,pitting will be more serious.
3. The price The price different of them is about 500~700 RMB