Brass is an alloy mainly consisting of copper and zinc. Brass alloys can be easily shaped and are available in various colors. Brass has high thermal conductivity. CZ129 forging brass alloys have good forgeability. They are available in the form of rod.
The following datasheet gives details about CZ129 brass alloys.
Chemical Composition
| Elements |
Min (%) |
Max (%) |
| Cu |
58.50 |
61.00 |
| Pb |
0.80 |
1.50 |
| Fe |
– |
0.20 |
| Total Others |
– |
0.50 |
| Zn |
Remainder |
Mechanical properties according to BS2874 (As per temper M)
| Range |
UTS Min |
UTS Max |
PS Min |
Elongation |
Hardness |
| Round |
1.5 – 18 |
380 |
– |
– |
25 |
– |
– |
| Round |
18 – 40 |
380 |
– |
– |
25 |
– |
– |
| Round |
40 – 75 |
350 |
– |
– |
28 |
– |
– |
| Hex |
3 – 18 |
380 |
– |
– |
25 |
– |
– |
| Hex |
18 – 40 |
380 |
– |
– |
25 |
– |
– |
| Hex |
40 – 70 |
350 |
– |
– |
28 |
– |
– |
| Square |
3 – 18 |
380 |
– |
– |
25 |
– |
– |
| Square |
18 – 40 |
380 |
– |
– |
25 |
– |
– |
| Square |
40 – 60 |
350 |
– |
– |
28 |
– |
– |
| Rectangle |
3 – 18 |
380 |
– |
– |
25 |
– |
– |
| Rectangle |
18 – 40 |
380 |
– |
– |
25 |
– |
– |
| Rectangle |
40 – 50 |
350 |
– |
– |
28 |
– |
– |
| PHYSICAL PROPERTIES |
| Melting Point – Liquidus °F |
1640 |
| Melting Point – Solidus °F |
1620 |
| Density lb/cu in at 68°F |
0.305 |
| Specific Gravity |
8.44 |
| Electrical Conductivity %IACS at 68°F |
27 |
| Thermal Conductivity BTU/ sq ft/ ft hr/ °F at 68°F |
69 |
| Coefficient of Thermal Expansion 68-572 10⁻⁶ per °F |
11.5 |
| Specific Heat BTU/ lb /°F at 68°F |
0.09 |
| Modulus of Elasticity in Tension ksi |
15000 |
| Modulus of Rigidity ksi |
5600 |
| FABRICATION PROPERTIES |
| Soldering |
Excellent |
| Brazing |
Good |
| Oxyacetylene Welding |
Not Recommended |
| Gas shielded Arc Welding |
Not Recommended |
| Coated Metal Arc Welding |
Not Recommended |
| Spot Welding |
Not Recommended |
| Seam Welding |
Not Recommended |
| Butt Welding |
Fair |
| Capacity for Being Cold Worked |
Poor |
| – |
Excellent |
| Machinability Rating |
80 |
