+ + Copper Alloy No. C95600 CDA 956 Silicone Bronze Casting Alloy
Copper Alloy C95600 CDA 956 Silicone Bronze Casting Alloy

Copper Alloy No. C95600

Aluminum Bronze CDA 956

Chemical Composition % by weight

Element Nominal Minimum Maximum
Copper 90.3 88 Rem.
Lead - - -
Iron - - -
Nickel (incl Co) - - .25
Aluminum 7 6 8
Manganese - - -
Magnesium - - -
Silicon 2.5 1.8 3.2
Zinc - - -
Tin - - -

Applications

Cable connectors, pole line hardware, terminals, gears, worm gears, marine hardware, valve stems.

 

Mechanical Properties (as cast)

 

M07 - As Continuous Cast

Hardness* Brinell Hardness (3000 kg load) 140
Tensile Strength** KSI 75
Yield Strength ** KSI (0.5% Ext. under load) 34
Elongation** % in 2 inch 18

**Test values are nominal approximations and depend on specimen size and orientation.

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 22.3
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 572 F .000009
Density lb/cu in @ 68 F .278
Electrical Conductivity % IACS @ 68 F 8
Modulus of Elasticity KSI 15,000

*Volume basis

Fabrication Practices

Stress relieving temperature 600 F or 315 C
Time at temperature 1 hour per inch of section thickness
Responds to heat treatment Yes
Solution heat treating temperature 1600-1675 F or 870-910 C
Time at temperature 1 hour per inch of section thickness
Quenching medium Water
Annealing temperature 1150-1225 F or 620-660 C
Time at temperature 1 hour per inch of section thickness
Machinability rating (Free Cutting Brass=100) 60
Suitability for being joined by: Soldering/Good
  Brazing/Good
  Oxyacetylene Welding/Not Recommended
  Gas Shielded Arc Welding/Good
  Coated Metal Arc Welding/Fair