If the door lock is zinc alloy material, its hardness and rust resistance is very poor, it is easy to fade black and rot and blister thick plating, but its advantage is easy to make parts of complex patterns, especially pressure casting. The locks with more complex patterns seen in the market may be made of zinc alloy, so consumers should carefully identify them.
Steel, good strength, low cost, but easy to rust, generally used as the internal structure of the lock material, not as external decoration.
Aluminium or aluminium alloy, ordinary aluminium alloy (except aerospace) soft and light, material strength is low, but easy to process.
Copper is one of the most widely used lock materials, with good mechanical properties, corrosion resistance and processing performance, and bright color, especially copper forged handles and other lock ornaments, smooth surface, good density, no pores, sand holes. Both firm and rust-proof, can be used to plating real gold or placer gold and other surface treatment, looks magnificent, noble and generous, add many colors to people’s home.
Look from durable Angle, the best material should be stainless steel, use as surface material especially, use more more bright. It has good strength, strong corrosion resistance and constant color. But there are a variety of stainless steel, mainly can be divided into ferrite and austenite. Ferritic stainless steel magnetic, commonly known as stainless iron, a long time, the environment is not good will rust, at present, 304 stainless steel is the best stainless steel material