Purity measurement: The purity of brass can be measured by Archimedes' principle, which measures the volume and mass of the sample, then calculates the proportion of copper according to the density of copper and zinc.
Purity measurement:
The purity of brass can be measured by Archimedes' principle, which measures the volume and mass of the sample, and then calculates the proportion of copper in the brass according to the density of copper and the density of zinc.
Plain brass
It is an alloy of copper and zinc. When the zinc content is less than 39%, zinc can be dissolved in copper to form single-phase a, called single-phase brass, good plasticity, suitable for hot and cold pressure processing. When the zinc content is greater than 39%, there is single-phase a and b solid solution based on copper and zinc, called biphase brass, b makes the plasticity is small and the tensile strength increases, only suitable for hot pressure processing if the mass fraction of zinc continues to increase, the tensile strength decreases, no use value code with "H + number", H represents brass, The number represents the mass fraction of copper. For example, H68 means brass with 68% copper and 32% zinc, while cast brass has a "Z" in front of the code, such as ZH62 and Zcuzn38 means cast brass with 38% zinc and a margin of copper. H90, H80 single-phase, gold, so there is a gold common name, called coating, decoration, medal and so on. H68, H59 belong to biphasic brass, widely used in electrical structures, such as bolts, nuts, washers, springs and so on. In general, single-phase brass is used in cold deformation processing and biphase brass is used in hot deformation processing.