Oxygen Free Silver-Bearing Copper – UNS C10500

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
     Annealing
     Cold Working
     Hot Working
     Welding
     Forging
     Machinability
Applications

Introduction

UNS numbers C10100 to C13000 indicate the types of pure copper. Pure and unalloyed copper has excellent corrosion resistance and high thermal and electrical conductivity. Unalloyed copper grades vary in the amount of impurities, and hence act in a different manner. The purity of metal is highly important as most alloying elements are quite harmful to the electrical conductivity of copper.

The datasheet given below will highlight the chemical composition, physical and mechanical properties, other designations, fabrication and heat treatment and applications of UNS C10500 oxygen free silver-bearing copper alloys.

Chemical Composition

The chemical composition of UNS C10500 copper alloys is outlined in the following table.

Element Content (%)
Cu 99.95
Ag 0.03125

Physical Properties

The following table shows the physical properties of UNS C10500 copper alloys.

Properties Metric Imperial
Density (UNS C10700) 8.94 g/cm3 0.323 lb/in3
Melting point 1083°C 1981°F

Mechanical Properties

The mechanical properties of UNS C10500 copper alloys are displayed in the following table.

Properties Metric Imperial
Tensile strength, ultimate 221-455 MPa 32100-66000 psi
Tensile strength, yield (depending on temper) 69.0-365 MPa 10000-52900 psi
Elongation at break (in 101.6 mm (4 in.)) 55.00% 55.00%
Modulus of elasticity 117 GPa 16969 ksi
Poisson's ratio 0.34 0.34
Machinability (UNS C36000 (free-cutting brass) = 100%) 20% 20%
Shear modulus 44.0 GPa 6380 ksi

Other Designations

Equivalent materials to UNS C10500 copper alloys are given in the table below.

ASTM B133 ASTM B298
ASTM B187 ASTM B355
ASTM B189 ASTM B3
ASTM B224 ASTM B49
ASTM B1 ASTM B506
ASTM B152 ASTM B188
ASTM B2 ASTM B246
ASME SB152 ASTM B272

Fabrication and Heat Treatment

Annealing

UNS C10500 oxygen free silver-bearing copper is annealed between 482 and 760°C (900 and 1400°F)

Cold Working

UNS C10500 oxygen free silver-bearing copper has excellent cold working capacity.

Hot Working

UNS C10500 alloys can be hot formed in an excellent manner.

Welding

Welding methods such as coated metal arc welding, seam welding and spot welding are not recommended for UNS C10500 alloys, whereas gas shielded arc welding and butt welding are good for these alloys. Brazing and soldering are considered as excellent processes for UNS C10500 alloys.

Forging

Temperatures between 760 and 871°C (1400 and 1600°F) are used for forging the UNS C10500 alloys whose hot forgeability rating is 65%.

Machinability

The machinability rating of UNS C10500 copper alloys is 20%.

Applications

UNS C10500 copper alloys are used for electrical conductors working at high temperatures, where softening of copper readily takes place.

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