Description
Brass primarily comprises a blend of copper and zinc. These alloys are readily malleable and are accessible in multiple color variations. Notably, brass demonstrates elevated thermal conductivity. CZ129 forging brass alloys exhibit commendable forgeability characteristics and are provided in rod form.
The subsequent datasheet provides comprehensive information regarding CZ129 brass alloys.
Chemical Composition
| Elements | Min (%) | Max (%) |
| Cu | 58.50 | 61.00 |
| Pb | 0.80 | 1.50 |
| Fe | – | 0.20 |
| Total Others Excl. Fe | – | 0.50 |
| Zn | Remainder |
Mechanical Properties According To BS2874 (As Per Temper M)
| Range |
From |
To |
UTS Min (N/mm²) |
PS Min |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
1.5 |
18 |
380 |
– |
25 |
– |
– |
| 18 |
40 |
380 |
– |
25 |
– |
– |
| 40 |
75 |
350 |
– |
28 |
– |
– |
| Hex (A/F) |
3 |
18 |
380 |
– |
25 |
– |
– |
| 18 |
40 |
380 |
– |
25 |
– |
– |
| 40 |
70 |
350 |
– |
28 |
– |
– |
| Square (A/F) |
3 |
18 |
380 |
– |
25 |
– |
– |
| 18 |
40 |
380 |
– |
25 |
– |
– |
| 40 |
60 |
350 |
– |
28 |
– |
– |
| Rectangle (Thickness) |
3 |
18 |
380 |
– |
25 |
– |
– |
| 18 |
40 |
380 |
– |
25 |
– |
– |
| 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 68-57210⁻⁶ per °F (68 – 572°F) | 11.5 |
| Specific Heat Capacity Btu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tension ksi | 15000 |
| Modulus of Rigidity ksi | 5600 |
Fabrication Properties
| Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Not Recommended |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Not Recommended |
| Seam Weld | Not Recommended |
| Butt Weld | Fair |
| Capacity for Being Cold Worked | Poor |
| Capacity for Being Hot Formed | Excellent |
| Forgeability Rating | 100 |
| Machinability Rating | 80 |
