What do you know about brass?

Brass is an alloy composed of copper and zinc. In fact, brass can also be divided into ordinary brass and special brass. Copper suppliers will tell you more about all the classifications of brass.

1) Common brass: it is an alloy of copper and zinc.

When the zinc content is less than 39%, zinc can dissolve in copper to form single-phase a, which is called single-phase brass. It has good plasticity and is suitable for hot and cold pressure processing. When the zinc content is more than 39%, there is a single phase A and B solid solution based on copper and zinc, which is called biphase brass. B makes the plasticity small and the tensile strength increased, which is only suitable for hot pressure processing.

If the mass fraction of zinc continues to increase, the tensile strength will decrease and there is no use value. The code is represented by "H + number", H represents brass, and the number represents the mass fraction of copper. For example, H68 refers to brass with copper content of 68% and zinc content of 32%, and cast brass is marked with "Z" before the code. For example, zh62, such as zcuzn38, refers to cast brass with zinc content of 38% and copper residue.

H90 and H80 are single-phase and golden yellow, so they are called gold plating, decorations, medals, etc. H68 and H59 belong to duplex 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.

2) Special brass: the multicomponent alloy formed by adding other alloy elements to ordinary brass is called brass.

The elements often added are lead, tin, aluminum, etc., which can be called lead brass, tin brass and aluminum brass accordingly. Purpose of adding alloying elements. It is mainly to improve the tensile strength and processability.

Code: represented by "H + symbol of main additive element (except zinc) + mass fraction of copper + mass fraction of main additive element + mass fraction of other elements". For example, HPb59-1 indicates that the mass fraction of copper is 59%, the mass fraction of lead containing the main additive element is 1%, and the residual is lead brass with zinc.