CZ115 is a duplex high tensile brass with a restricted aluminum content to facilitate soldering and brazing. Sometimes referred to as a manganese bronze, CZ115 has additions of iron, tin and manganese that benefit the physical and mechanical attributes of the alloy.
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) |
UTS Max (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 |
– |
– |
| Thickness |
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 |
| Technique |
Suitability |
| Capacity for being Cold formed |
Poor |
| Capacity for Being Hot Worked |
Good |
| Machinability Ration |
30% |
| Resistance to Corrosion |
Excellent |
| Suitability for Soldering |
Excellent |
