Metal material of brass bushing

The simple difference between brass and bronze is also the difference in color.
Bronze is named for bronze and brass is named for bronze.So you can basically tell the difference in color.Metallographic analysis is also necessary to make a strict distinction.

The dark green or rust color you said is not the true color of bronze.
Here is a basic knowledge of copper alloys: copper alloys are formed by adding certain alloy elements (such as zinc, tin, aluminum, beryllium, manganese, silicon, nickel, phosphorus, etc.) into pure copper.Copper alloy has good electrical conductivity, thermal conductivity and corrosion resistance, as well as high strength and wear resistance.
Copper alloys are divided into brass and bronze according to their composition.
1. Brass is a copper alloy with zinc as the main alloy element.According to chemical composition, brass is divided into two types: normal brass and special brass.
(1) Ordinary brass Ordinary brass is a binary copper-zinc alloy.Due to its good plasticity, it is suitable for making sheets, bars, wires, pipes and deep-drawing parts such as condensation pipes, heat sinks, mechanical and electrical parts.Brass with an average content of 62% and 59% can also be cast, called cast brass.
(2) In order to obtain higher strength, corrosion resistance and good casting performance, special brass is formed when aluminum, silicon, manganese, lead and tin are added to the copper-zinc alloy.Such as lead brass, tin brass, aluminum brass, silicon brass, manganese brass, etc.

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