Bending radius is generally R more than 3D, which is made by cold bending or medium frequency bending, usually with 3D, 5D and 10D. The bending angle is usually 15, 30, 45, 60 and 90 degrees, which can be made by the user at any angle, plus / without straight section. The products are made of stainless steel, alloy steel, carbon steel, nickel base alloy and so on.

Common standard