Oxygen Free Copper – UNS C10100

Topics Covered

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

Introduction

Unalloyed copper or oxygen free coppers have good corrosion resistance and high thermal and electrical properties. Unalloyed coppers of different grades vary based on the amount of impurities present, and have different characteristics. UNS designations of commercially available pure copper are C10100 to C13000. These oxygen free coppers are suitable for applications, which require ductility and high conductivity.

The following section will discuss in detail about UNS C10100 oxygen free copper.

Chemical Composition

The following table shows the chemical composition of UNS C10100 copper.

Element Content (%)
Cu, Copper 99.99

Physical Properties

The physical properties of UNS C10100 copper are given in the following table.

Properties Metric Imperial
Density 8.89 - 8.94 g/cm3 0.321 - 0.323 lb/in3
Melting point 1083°C 1981°F

Mechanical Properties

The mechanical properties of UNS C10100 copper are tabulated below.

Properties Metric Imperial
Hardness, Vickers (½ hard) 75.0 - 90.0 75.0 - 90.0
Hardness, Vickers (full hard) 90.0 - 105 90.0 - 105
Tensile strength, ultimate (varies with heat treatment) 221 - 455 MPa 32100 - 66000 psi
Tensile strength, yield (varies widely with heat treatment) 69.0 - 365 MPa 10000 - 52900 psi
Elongation at break (in 101.6 mm (4 in.)) 55.00% 55.00%
Modulus of elasticity 115 GPa 16700 ksi
Poissons ratio 0.310 0.310
Machinability (UNS C36000 (free-cutting brass) = 100%) 20% 20%
Shear modulus 44.0 GPa 6380 ksi

Other Designations

The designations that are equivalent to UNS C10100 copper are outlined in the following table.

AMS 4700 ASTM B187 ASTM B286 ASTM B451 ASTM B75
ASTM B1 ASTM B188 ASTM B298 ASTM B470 ASTM F68
ASTM B111 ASTM B189 ASTM B3 ASTM B48 MIL B-18907
ASTM B133 ASTM B2 ASTM B33 ASTM B49 MIL W-3318
ASTM B152 ASTM B224 ASTM B355 ASTM B496 MIL W-85
ASTM B172 ASTM B246 ASTM B359 ASTM B640 QQ B575
ASTM B173 ASTM B272 ASTM B432 ASTM B641 QQ B650
ASTM B174 ASTM B280 ASTM B447 ASTM B698 QQ W343

Fabrication and Heat Treatment

Machinability

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The machinability rate of C10100 copper is 20%.

Welding

Welding methods such as soldering, brazing, gas shielded arc welding, oxyacetylene welding and butt welding are recommended for C10100 copper. Other welding methods such as coated metal arc welding, spot welding and seam welding are not preferred.

Forging

C10100 copper is forged at hot working temperatures ranging from 760 to 871°C (1400 to 1600°F). The hot forgeability rate of this metal is 65%.

Hot Working

C10100 copper has excellent hot working property.

Cold Working

C10100 copper has excellent cold working property.

Annealing

Annealing of C10100 copper is performed at temperatures ranging from 371 to 649°C (700 to 1200°F).

Applications

The following are the major applications of UNS C10100 copper:

  • Electrical and electronic conductors
  • Wave guides
  • Cavity resonators
  • Superconductor matrixes
  • Vacuum tube and solid-state devices
  • Glass-to-metal seals

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