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The purity of the measured brass can be measured by the Archimedes principle, the volume and mass of the sample are measured, and the ratio of copper contained in the brass can be calculated from the density of copper and the density of zinc.
It is an alloy of copper and zinc.
When the zinc content is less than 35%, 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 and hot press processing.
When the zinc content is 36%~46%, there is a single phase and a copper-zinc-based β solid solution, which is called duplex brass. The β phase reduces the plasticity of the brass and increases the tensile strength. Hot pressure processing.