Description
CZ115 is classified as a duplex high tensile brass alloy that intentionally limits its aluminum content to improve its soldering and brazing characteristics. It is occasionally referred to as manganese bronze. CZ115 sets itself apart by incorporating additional elements such as iron, tin, and manganese, which contribute to enhancing the physical and mechanical properties of the alloy, making it suitable for various applications.
Chemical Composition
| Elements | Min (%) | Max (%) |
| Cu | 56.50 | 58.50 |
| Pb | 0.50 | 1.50 |
| Sn | 0.20 | 0.80 |
| Fe | 0.30 | 1.00 |
| Al | – | 0.10 |
| Mn | 0.50 | 2.00 |
| Total Others | – | 0.50 |
| Zn | Remainder |
Mechanical Properties According To BS2874 CZ115 (As Per Temper M)
| Range (mm) |
From |
To |
UTS Min (N/mm²) |
PS Min (N/mm²) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
1.5 | 18 | 460 | 250 | 12 | – | – |
| 18 | 75 | 440 | 210 | 15 | – | – |
| Hex (A/F) |
3 | 18 | 460 | 250 | 12 | – | – |
| 18 | 70 | 440 | 210 | 15 | – | – |
| Square (A/F) |
3 | 18 | 460 | 250 | 12 | – | – |
| 18 | 60 | 440 | 210 | 15 | – | – |
| Rectangle (Thickness) |
6 | 18 | 460 | 250 | 12 | – | – |
| 18 | 50 | 440 | 210 | 15 | – | – |
Physical Properties
| Melting Point | 940°C |
| Density | 8.42 g/cm³ |
| Specific Heat | 380 J/Kg°K |
| Thermal conductivity (RT) | 88 W/m°K |
| Thermal expansion coefficient (20-200°C) | 20 x 10-6 |
| Electrical conductivity | 18% IACS |
| Electrical Resistivity | 0.082 ohm mm²/m |
Fabrication Properties
| Capacity for being Cold formed | Poor |
| Capacity for being Hot worked | Good |
| Machinability Ration | 30% |
| Resistance to Corrosion | Excellent |
| Suitability for soldering | Excellent |
