Copper UNS C12100

Topics Covered

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

Introduction

UNS C12100 copper alloys have improved embrittlement resistance during the welding process due to deoxidization.

The datasheet below highlights the chemical composition, physical and mechanical properties, other designations, fabrication and heat treatment and applications of UNS C12100 copper alloys.

Chemical Composition

The chemical composition of UNS C12100 copper alloys is outlined in the following table.

Element Content (%)
Cu 99.9
P 0.008
Ag 0.0125

Physical Properties

The following table shows the physical properties of UNS C12100 copper alloys.

Properties Metric Imperial
Density 8.89 g/cm3 0.321 lb/inÂ3

Mechanical Properties

The mechanical properties of UNS C12100 copper alloys are displayed in the following table.

Properties Metric Imperial
Tensile strength, ultimate 221-393 MPa 32100-57000 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%
Machinability (UNS C36000 (free-cutting brass) = 100%) 20% 20%
Poisson's ratio 0.34 0.34
Elastic modulus 117 GPa 16969 ksi

Other Designations

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Equivalent materials to UNS C12100 copper alloys are:

  • ASTM B224
  • MIL B-20292
  • QQ B650
  • UNS C12100

Fabrication and Heat Treatment

Annealing

UNS C12100 copper alloys are annealed between 371 and 649°C (700 and 1200°F).

Cold Working

UNS C12100 copper alloys have excellent annealing capacity.

Welding

UNS C12100 copper alloys are capable of being oxyacetylene welded, butt welded, gas shielded arc welded, brazed and soldered. Welding processes not recommended for these alloys include seam welding, coated metal arc welding and spot welding.

Forging

Temperatures between 760 and 871°C (1400 and 1600°F) are best suited for the UNS C12100 copper alloys whose hot forgeability rating is 65%.

Machinability

UNS C12100 copper alloys have a machinability rating of 20%.

Hot Working

UNS C12100 copper alloys have an excellent hot forming capacity.

Applications

UNS C12100 copper alloys are used for components with welding requirements. Some of these components include bus bars, electromechanical hardware connectors etc.

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