The bronze family includes:Cu-Sn-P alloys (phosphor bronzes)CU-Sn-Pb-P alloys ((lead phosphor bronze)Cu-Al alloys ((aluminum bronze)CU-Si alloys ((silicon bronzes)5 - Other alloy groupsCU-Ni alloys: As the name implies, the main alloying element is nickel
1- Pure copper: which contains 99.3% or more copper.
2 - Alloys with a high percentage of copper: have a percentage of Copper between 96% to 99.3% and to achieve special properties, Silver may be added.
3- Brass: It has Zinc as the main alloying element, also other elements such as iron, aluminum, nickel, and silicon are added to improve the properties of the alloy. Brass has high corrosion resistance and tensile strength.
Brass additives
Adding lead to brass Metal compounds can improve machining properties, as well as reduce tool wear. Adding aluminum, iron, and manganese to rice increases strength, adding silicon improves abrasion resistance.
Classification of brasses
- Alpha brass, with a zinc content of less than 37%. These alloys are ductile and can be cooled.
- Alpha-beta or binary brass contains 37-45% zinc. These alloys have a more limited ductility and are harder and stronger.
Brass metal families:
- CU-Zn alloys
- CU-Zn-Pb alloys (leaded brass)
- Cu-Zn-Sn alloys (tin brass)
4 - Bronzes: have tin as the only alloying element or the main alloying element. Today, bronze refers to copper alloys whose main alloy element is other than nickel and zinc.
The bronze family includes:
- Cu-Sn-P alloys (phosphor bronzes)
- CU-Sn-Pb-P alloys ((lead phosphor bronze)
- Cu-Al alloys ((aluminum bronze)
- CU-Si alloys ((silicon bronzes)
5 - Other alloy groups
- CU-Ni alloys: As the name implies, the main alloying element is nickel. This group can include other alloying elements or nickel alone.
- CU-Ni-Zn alloys: These alloys are known as nickel silver due to the color of the alloy. This group contains zinc and nickel as the main alloying elements, and other alloying elements may also be added.
Leaded Copper: Lead copper is a cast copper alloy that contains 20% or more lead additive. They also contain small amounts of silver but no trace elements or zinc.
6- Special alloys: When alloys contain Chemical compounds that do not fall into any of the above groups, they are called special alloys.
