UNS C68700 Aluminum Brass
UNS C68700/CDA 687/CW702R/CZ110/CuZn20A12As is Good to excellent corrosion resistance and Excellent cold workability for forming and bending.
|(1) Cu value includes Ag.
(2) Cu + Sum of Named Elements 99.5% min.
|Form||Temper||Temper Code||Tensile Strength
|Rockwell F scale|
|* Measured at room temperature, 68°F (20°C).|
|Tube||Nominal Grain Size 0.025 mm||OS025||60 Typ||27 Typ||55 Typ||77 Typ|
Physical Properties:Melting Point – Liquidus°F: 1780
Melting Point – Solidus°F: 1710
Density lb/cu in. at 68°F: 0.301
Specific Gravity: 8.33
Electrical Conductivity% IACS at 68°F: 23
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F: 58
Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F): 10.3
Specific Heat CapacityBtu/ lb /°F at 68°F: 0.09
Modulus of Elasticity in Tension ksi: 16000
Modulus of Rigidity ksi: 6000
Equivalent materials to UNS C68700 arsenical aluminium brass alloy are:
The machinability rate of the UNS C68700 is 30.
Soldering, brazing, oxyacetylene welding, gas shielded arc welding, spot welding, seam welding, and butt welding are considered suitable welding processes, whereas processes such as coated metal arc welding are not recommended for the UNS C68700 alloys.
The hot working capacity of the UNS C68700 is fair with the suitable hot working temperature ranging between 760 and 871.1°C (1400 and 1600°F).
The UNS C68700 has an excellent cold working capacity.
The annealing temperature of the UNS C68700 is between 427 and 593°C (800 and 1100°F).