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
ElementsMin (%)Max (%)
Cu62.0065.00
Pb0.30
Total Others0.60
ZnRemainder
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

CZ108

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