Silver Bearing Copper

Silver Bearing Copper
alloy grade CuAg
Micro Structure
Tradename: Tough Pitch with Ag (STP)
Material No. UNS System (ASTM): C11600
Chemical Composition
Cu(1,2,3) Ag(4)
Min (%) 99.90 0.085
  1. This is a high conductivity copper which has, in the annealed condition a minimum conductivity of 100% IACS.
  2. Cu value includes Ag.
  3. Oxygen and trace elements may vary depending on the process.
  4. Ag 0.085% min is the equivalent of, Ag 25 Troy Oz min.

Mechanical Properties

Physical Properties

Melting Point –Liquidus °C 1082
Density lb/cu in. at 20°C 0.322(1)
Specific Gravity 8.91(2)
Electrical Conductivity% IACS at 20°C 100
Thermal Conductivity Btu/ sq ft/ ft hr/ °C at 20°C 224
Coefficient of Thermal Expansion 20-300 10⁻⁶ per °C (200 – 300°C) 9.8
Specific Heat Capacity Btu/ lb /°C at 20°C 0.092
Modulus of Elasticity in Tension ksi 17000
Modulus of Rigidity ksi 6400
(1) Actual value is .321 - .323.
(2) Actual value is 8.89 - 8.94.

Thermal Properties

Treatment Minimum* Maximum*
Annealing 482 760
Hot Treatment 760 871
* Temperature is Measured in Celsius.

Fabrication Properties

Technique Stability
Brazing Good
Butt Weld Good
Capacity for Being Cold Worked Excellent
Capacity for Being Hot Formed Excellent
Coated Metal Arc Welding Not Recommended
Forgeability Rating 65
Gas Shielded Arc Welding Fair
Machinability Rating 20
Oxyacetylene Welding Not Recommended
Seam Weld Not Recommended
Soldering Excellent
Spot Weld Not Recommended
General Fabrication Processes
  • Forging
  • Extruding
  • Drawing
  • Machining

Applicable Form

Form Description
Rod Hot Extruded & Cold Drawn Copper Rod
Flat Hot Extruded & Cold Drawn Copper
(COPPER BUS BAR, Flat BAR ,Strips)
Tube Hot Extruded Tube

Typical Uses / Application

Product Category Product Reason
Electrical Busbars Electrical Conductivity
Commutator Bars and Segments Electrical Conductivity
Contacts Electrical Conductivity, Corrosion Resistance
Generator Coils Electrical Conductivity
Radio Parts Electrical Conductivity
Switches Electrical Conductivity
Terminals Electrical Conductivity
Windings Electrical Conductivity
Industrial Clad Metals Electrical Conductivity

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