CW505L

Both CuZn30 and CuZn28 alloys exhibit an impressive combination of cold forming capabilities and solid mechanical strength. CuZn30, in particular, boasts excellent hot forming characteristics and excels in soldering and brazing applications. These alloys, including CuZn30, are commonly referred to as “deep-draw” or “cartridge” brass due to their exceptional deep drawing properties.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu69.0071.00
Pb0.05
Fe0.05
Sn0.10
Ni0.30
Al0.02
Total Others0.10
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO ASTM B927 (AS PER TEMPER HO2)
Range (mm) From To UTS Min (N/mm²) UTS Max (N/mm²) PS Min (N/mm²) Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 75 350 430 21  
Hex (A/F) 3 70 350 430 21
Square (A/F) 3 60 350 430 21
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1750
Melting Point – Solidus°F 1680
Density lb/cu in. at 68°F 0.308
Specific Gravity 8.53
Electrical Conductivity % IACS at 68°F 28
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 70
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.1
Specific Heat Capacity Btu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tension ksi 16000
Modulus of Rigidity ksi 6000
FABRICATION PROPERTIES 
Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Good
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Not Recommended
Spot Weld Fair
Seam Weld Not Recommended
Butt Weld Good
Capacity for Being Cold Worked Excellent
Capacity for Being Hot Formed Fair
Machinability Rating 30

CW505L

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