Brass is an alloy composed of copper and zinc

Cupronickel is an alloy of copper and nickel

Bronze is an alloy formed by copper and elements other than zinc and nickel, mainly tin bronze, aluminum bronze, etc.

Red copper is copper with a high copper content, and the total content of other impurities is below 1%.

Ordinary brass It is an alloy composed of copper and zinc.

When the zinc content is less than 39%, zinc can be dissolved in copper to form a single-phase a, called single-phase brass, which has good plasticity and is suitable for cold, hot, and pressurized processing.

When the zinc content is greater than 39%, there are a single-phase and copper-zinc-based b solid solution, called dual-phase brass, b makes the plasticity small and the tensile strength increases, which is only suitable for hot press processing

If you continue to increase the mass fraction of zinc, the tensile strength will decrease and there will be no use value

The code name is represented by "H + number", H represents brass, and the number represents the mass fraction of copper.

For example, H68 means brass with a copper content of 68% and a zinc content of 32%. Cast brass has a "Z" before the code name, such as ZH62

For example, Zcuzn38 means a cast brass with a zinc content of 38% and the balance being copper.

H90 and H80 are single-phase, golden yellow, so they are collectively called gold, which are called plating, decorations, medals, etc.

H68 and H59 belong to two-phase brass, which are widely used in structural parts of electrical appliances, such as bolts, nuts, washers, springs, etc.

In general, single-phase brass for cold deformation processing and dual-phase brass for hot deformation processing.

Special brass

The multi-element alloy formed by adding other alloying elements to ordinary brass is called brass. Commonly added elements include lead, tin, aluminum, etc., which can be called lead brass, tin brass, and aluminum brass accordingly. The purpose of adding alloying elements. The main purpose is to improve the tensile strength and improve the manufacturability. Code: "H + the symbol of the main element (except zinc) + the mass fraction of copper + the mass fraction of the main element + the mass fraction of other elements".

For example: HPb59-1 means that the mass fraction of copper is 59%, the mass fraction of lead containing the main element is 1%, and the balance is lead brass with zinc.

High lead bronze