CZ124

CZ124, a free machining brass alloy resulting from the fusion of copper and zinc, exhibits the highest level of machinability among all copper alloys, serving as the benchmark for comparison. CZ124 Brass is renowned for its strength and corrosion resistance, closely resembling steel properties, making it a widely used copper alloy today. Achieving precision in machining with CZ124 Brass is a straightforward task. Although ductile when softened, CZ124 Brass remains robust and retains its strength even under demanding conditions. CZ124 Brass develops a thin protective “patina,” distinct from steel and iron, which prevents rust formation when exposed to the atmosphere. Due to its high density, CZ124 Brass is particularly suitable for fabricating heavy industrial components. The refined polished finish is also a valued trait of CZ124 Brass. This versatile material is available in various forms, including rounds, flats, squares, hexagons, shapes, and hollows.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu60.0063.00
Pb2.503.70
Fe0.30
Total Others Excl Fe0.50
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO BS2874 (AS PER TEMPER M )
Range From To UTS Min (N/mm²) PS Min (N/mm²) Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 25 330 130 12
25 50 300 115 18
50 75 280 95 22
Hex (A/F) 3 25 330 130 12
25 50 300 115 18
50 70 280 95 22
Square (A/F) 3 12 300 115 18
12 25 310 105 12
50 75 280 95 22
Rectangle (Thickness) 3 25 300 115 18
25 50 280 95 22
PHYSICAL PROPERTIES
Melting Point – Liquidus°F1650
Melting Point – Solidus°F1630
Densitylb/cu in. at 68°F0.307
Specific Gravity8.5
Electrical Conductivity% IACS at 68°F26
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F67
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F)11.4
Specific Heat CapacityBtu/ lb /°F at 68°F0.09
Modulus of Elasticity in Tensionksi14000
Modulus of Rigidityksi5300
 
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 WorkedFair
Capacity for Being Hot FormedFair
Machinability Rating100
 

CZ124

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