CZ129

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
ElementsMin (%)Max (%)
Cu58.5061.00
Pb0.801.50
Fe0.20
Total Others Excl. Fe0.50
ZnRemainder
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°F1640
Melting Point – Solidus°F1620
Density lb/cu in. at 68°F0.305
Specific Gravity8.44
Electrical Conductivity % IACS at 68°F27
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F69
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F)11.5
Specific Heat Capacity Btu/ lb /°F at 68°F0.09
Modulus of Elasticity in Tension ksi15000
Modulus of Rigidity ksi5600
FABRICATION PROPERTIES
TechniqueSuitability
SolderingExcellent
BrazingGood
Oxyacetylene WeldingNot Recommended
Gas Shielded Arc WeldingNot Recommended
Coated Metal Arc WeldingNot Recommended
Spot WeldNot Recommended
Seam WeldNot Recommended
Butt WeldFair
Capacity for Being Cold WorkedPoor
Capacity for Being Hot FormedExcellent
Forgeability Rating100
Machinability Rating80

CZ129

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