CZ135 is a high tensile brass which is alloyed with aluminium, manganese and silicon etc. By alloying brass with strength-increasing elements, you get an alloy that is almost as hard as aluminium bronze, but considerably easier to process. The material also has good corrosion and wear resistance.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 57.00 | 60.00 |
| Pb | – | 0.80 |
| Sn | – | 0.30 |
| Fe | – | 0.50 |
| Al | 1.00 | 2.00 |
| Mn | 1.50 | 3.50 |
| Ni | – | 0.20 |
| Si | 0.30 | 1.30 |
| Total Others (excl.Sn,Pb,Fe,Ni) | – | 0.50 |
| Zn | Remainder |
Mechanical Properties according To BS2874 CZ135 (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 | 40 | 550 | 270 | 12 | – | – |
| 40 | 75 | 550 | 270 | 12 | – | – |
| Hex (A/F) | 3 | 40 | 550 | 270 | 12 | – | – |
| 40 | 70 | 550 | 270 | 12 | – | – |
| Square (A/F) | 3 | 40 | 550 | 270 | 12 | – | – |
| 40 | 60 | 550 | 270 | 12 | – | – |
| Rectangle (Thickness) | 3 | 40 | 550 | 270 | 12 | – | – |
| 40 | 50 | 550 | 270 | 12 | – | – |
| PHYSICAL PROPERTIES |
| Melting Point | 875-910 ˚C |
| Density | 8.0 g/cm³ |
| Electrical Conductivity | 7-8 MS/m |
| Heat conductivity | 60-70 W/(m*K) |
| Heat capacity | 377 J/(kg*K) |
| Coefficient of thermal expansion | 20 10-6/ K |
| Young’s modulus | 95 GPa |
| FABRICATION PROPERTIES |
| Technique | Suitability |
| Cold formed | Poor |
| Hot worked | Good |
| Machinability Rating | 30% |
| Resistance to corrosion | Excellent |
| Suitability for soldering | Excellent |
