Due to the material of stainless steel bends, it is generally more than 304, and the hardness of 200 and 201 is strong, which makes it more difficult to form. Stainless steel special-shaped pipe is widely used in various structural parts, tools and mechanical parts. Compared with round pipe, stainless steel special-shaped pipe generally has larger moment of inertia and section modulus, and has greater bending and torsion resistance, which can greatly reduce the structural weight and save steel. Stainless steel special-shaped pipes are generally distinguished according to the cross-section and overall shape. They can be generally divided into: Oval special-shaped steel pipe, triangular special-shaped steel pipe, hexagonal special-shaped steel pipe, rhombic special-shaped steel pipe, stainless steel checkered pipe, stainless steel U-shaped steel pipe, D-shaped pipe, stainless steel elbow, S-shaped pipe elbow, octagonal special-shaped steel pipe, semicircular special-shaped steel circle, unequal hexagonal special-shaped steel pipe Five petal quincunx shaped special-shaped steel pipe, double convex special-shaped steel pipe, double concave special-shaped steel pipe, melon seed shaped special-shaped steel pipe, conical special-shaped steel pipe, corrugated special-shaped steel pipe, etc.
Forging method. Machining flanges through forging can be divided into two types: free forging and die forging. Free forging involves compression processing under a forging press