MATERIALS

Aluminum) is a metal element, the element symbol is Al, which is a silver-white light metal. There is malleability. Commodities are often made into rods, flakes, foils, powders, ribbons and filaments.

Aluminum is a metal element, the element symbol is Al, which is a silver-white light metal. There is malleability. Commodities are often made into rods, flakes, foils, powders, ribbons and filaments.

Copper is a metal element and a transition element. Pure copper is a soft metal. The surface is reddish orange with metallic luster when it is just cut open, and its simple substance is purple-red.

Polyoxymethylene, also known as acetal resin, polyoxymethylene, and polyacetal, is a thermoplastic crystalline high molecular polymer, known as "super steel" or "sai steel."

Brass is an alloy composed of copper and zinc. Brass composed of copper and zinc is called ordinary brass. If it is a variety of alloys composed of more than two elements, it is called special brass.

Bronze is the earliest alloy in the history of metal smelting and casting. Adding tin or lead to pure copper (red copper) has good castability, wear resistance and stable chemical properties.