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CZ108
CZ108, often referred to as yellow brass, is characterized by a copper content of no less than 62%. Within the realm of cold forming processes, CuZn37 takes center stage as the primary brass alloy. Although some brasses with lower zinc content may display superior cold forming properties, CuZn37 remains the dominant and most widely utilized alloy for compelling reasons.
Primarily, its economic appeal cannot be overlooked. The lower cost of zinc compared to copper makes CuZn37 a cost-effective choice. Furthermore, the alloy’s forming characteristics align seamlessly with the demands of a multitude of applications. As a result, CZ108 stands as a dependable and versatile option for a wide array of cold forming needs.
CHEMICAL COMPOSITION
Elements | Min (%) | Max (%) |
Cu | 62.00 | 65.00 |
Pb | – | 0.30 |
Total Others | – | 0.60 |
Zn | Remainder |
MECHANICAL PROPERTIES ACCORDING TO BS2873 (AS PER TEMPER 1/2H)
Range | From | To | UTS Min (MPa) | UTS Max (MPa) | PS Min (MPa) | Elongation Min (%) | Hardness Min | Hardness Max |
Round (Dia) | 1.5 | 75 | 460 | 620 | – | – | – | – |
Hex (A/F) | 3 | 70 | 460 | 620 | – | – | – | – |
Square (A/F) | 3 | 60 | 460 | 620 | – | – | – | – |
Rectangle (Thickness) | 3 | 50 | 460 | 620 | – | – | – | – |
PHYSICAL PROPERTIES | |
Melting Point – Liquidus°F | 1680 |
Density lb/cu in. at 68°F | 0.305 |
Specific Gravity | 8.44 |
Electrical Conductivity % IACS at 68°F | 27.6 |
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F | 67 |
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11.4 |
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 | Excellent |
Oxyacetylene Welding | Good |
Gas Shielded Arc Welding | Fair |
Coated Metal Arc Welding | Not Recommended |
Spot Weld | Good |
Seam Weld | Not Recommended |
Butt Weld | Good |
Capacity for Being Cold Worked | Excellent |
Capacity for Being Hot Formed | Fair |
Machinability Rating | 35 |