What is the general lock made of alloy?
Aluminum alloy, ah, of course, some locks more detailed, for example, recently very fireman Manchurun smart lock, the knob is aluminum, the cylinder is copper
The lock cylinder is made of copper or copper alloy (white copper), zinc alloy and low carbon steel, because these materials are more resistant to corrosion, easy to process into a complex lock core structure are made of steel
