CW706R

CW706R is a dezincification-resistant brass known for its excellent cold working properties and a pure α-structure. This alloy is ideally suited for use in applications where exposure to warm, acidic waters is common. Furthermore, CW706R exhibits remarkable performance in various cold working processes, including coining, riveting, crimping, flanging, cold extrusion, and other similar operations.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu68.5072.50
Pb0.05
Fe0.07
Sn0.901.30
Ni0.10
P0.01
Mn0.10
As0.060.06
Total Others0.30
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO EN12451 (AS PER TEMPER R360)
Range (mm) From To UTS Min (MPa) PS Min (MPa) Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 75 360 140 45
Hex (A/F) 3 70 360 140 45
Square (A/F) 3 60 360 140 45
PHYSICAL PROPERTIES
Electrical conductivity %IACS 25%
Thermal conductivity But ft/ft² hºF 63
Thermal expansion coefficient (0–300 °C) 10-6/K 19.7
Density 8.55 g/cm3
Modulus of elasticity (68 ºF) 4100 (Kg/mm²)
FABRICATION PROPERTIES 
Machinability (CuZn39Pb3 = 100 %) 30%
Capacity for being cold worked Good
Capacity for being hot worked Fair
Resistance welding (butt weld) Good
Inert gas shielded arc welding Fair
Gas welding Good
Hard soldering Excellent
Soft soldering Excellent
Melting range 890 – 970 °C
Hot working 680-780 °C
Soft annealing (1–3 h) 450–650 °C
Thermal stress relieving (1–3 h) 250–350 °C

CW706R

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