Oxygen Free Copper – UNS C10200

Topics Covered

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

Introduction

Pure coppers are designated as UNS C10100 to C13000. Pure and unalloyed coppers have high corrosion resistance, and good electrical and thermal conductivity. Impurities present in different grades of unalloyed copper are different from each other. Oxygen free coppers are mainly applied in most of the applications that require high ductility and conductivity.

Chemical Composition

The following table shows chemical composition of UNS C10200 coppers.

Element Content (%)
Cu 99.95

Physical Properties

The physical properties of UNS C10200 coppers are given in the following table.

Properties Metric Imperial
Density 8.90 g/cm3 0.322 lb/in3
Melting point 1083°C 1981°F

Mechanical Properties

The mechanical properties of UNS C10200 coppers are tabulated below.

Properties Metric Imperial
Hardness, Vickers (½ hard) 75 - 90 75- 90
Hardness, Vickers ( full hard) 90 - 105 90 - 105
Tensile strength, ultimate (soft) 215 - 254 MPa 31200 - 36800 psi
Tensile strength, ultimate ( hard) 261 - 441 MPa 37900 - 64000 psi
Tensile strength, yield (@ strain 0.100%, varies with temper and cold work) 49.0 - 78.0 MPa 7110 - 11300 psi
Elongation at break 35 - 55% 35 - 55%
Modulus of elasticity 117 GPa 17000 ksi
Poisson’s ratio 0.31 0.31
Izod impact (type of Impact test unknown. Range reflects both soft and hard tempers) 34 - 61J 25.1 - 45 ft-lb
Fatigue strength (test specimen: annealed 25 mm diam. Rod) 67 MPa 9720 psi
Machinability (based on 100% machinability for BS2874 CZ 121 free-machining brass (20% of 100% for UNS C360000) 20% 20%
Shear modulus 44 GPa 6380 ksi

Thermal Properties

The thermal properties of UNS C10200 coppers are outlined in the following table.

Properties Metric Imperial
CTE, linear (@ 20.0 - 100°C/ 68.0 - 212°F) 17.0 μm/m°C 9.44 μin/in°F
CTE, linear (@ 20.0 - 200 °C/ 68.0 - 392°F) 17.3 μm/m°C 9.61 μin/in°F
CTE, linear (@ 20.0 - 300°C/ 68.0 - 572°F) 17.7 μm/m°C 9.83 μin/in°F
Specific heat capacity (@ 20.0 °C/ 68.0°F) 0.385 J/g°C 0.0920 BTU/lb°F
Thermal conductivity (@ 20.0°C/ 68.0°F) 383 - 391 W/m-K 2660 - 2710 BTU-in/hr-ft2 °F

Other Designations

Other designations that are equivalent to UNS C10200 coppers are listed in the following table.

AMS 4701 ASTM B173 ASTM B298 ASTM B48 ASTM B738
ASME SB111 ASTM B174 ASTM B3 ASTM B49 ASTM B743
ASME SB133 ASTM B187 ASTM B33 ASTM B496 ASTM B75
ASME SB359 ASTM B188 ASTM B355 ASTM B506 ASTM B8
ASME SB395 ASTM B189 ASTM B359 ASTM B556 ASTM B88
ASME SB42 ASTM B2 ASTM B372 ASTM B638 ASTM F9
ASME SB75 ASTM B224 ASTM B395 ASTM B640 MIL B-18907
ASTM B1 ASTM B226 ASTM B42 ASTM B641 MIL T-24107
ASTM B111 ASTM B246 ASTM B432 ASTM B68 MIL W-6712
ASTM B133 ASTM B272 ASTM B447 ASTM B687 MIL W-85
ASTM B152 ASTM B280 ASTM B451 ASTM B698 QQ B575
ASTM B172 ASTM B286 ASTM B470 ASTM B716 SAE J461
SAE J463        

Fabrication and Heat Treatment

Machinability

The machinability rate of UNS C10200 coppers is about 20%.

Welding

Oxyacetylene welding, brazing, gas shielded arc welding, butt welding, and soldering are most commonly used methods for welding UNS C10200 coppers. It is suggested that seam welding, coated metal arc welding, and spot welding methods are not used for welding these alloys.

Forging

UNS C10200 coppers can be forged at a temperature of about 760 to 871°C (1400 to1600°F). Hot forgeability of UNS C10200 coppers is about 65%.

Hot Working

UNS C10200 oxygen free coppers have excellent hot working capacity.

Cold Working

UNS C10200 oxygen free coppers have excellent cold working capacity.

Annealing

UNS C10200 coppers can be annealed at 371 to 649°C (700 to 1200°F).

Applications

UNS C10200 oxygen free coppers are used in the following applications:

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

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