Phosphorus Deoxidized Copper Alloy - High Residual Phosphorus UNS C12200

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

UNS numbers C10100 to C13000 represent commercially pure copper. The high electrical and thermal conductivity in addition to good corrosion resistance determine the use of pure copper. Alloying of copper interferes with the electrical conductivity of the metal which signifies the importance of its purity. Behavior of different grades of unalloyed copper varies in the amount of impurities present in the metal.

Chemical Composition

The chemical composition of high residual phosphorus UNS C12200 is shown in the following table.

Element Content (%)
Cu 99.90
P 0.02

Physical Properties

The following table states the physical properties of high residual phosphorus UNS C12200 copper.

Properties Metric Imperial
Density 8.94 g/cm³ 0.323 lb/in3

Mechanical Properties

The mechanical properties of high residual phosphorus UNS C12200 copper are given in the following table.

Properties Metric Imperial
Tensile strength, ultimate 221 - 379 MPa 32100 - 55000 psi
Tensile strength, yield 69.0 - 345 MPa 10000 - 50000 ps
Elongation at break 45.0 % 45.0 %
Machinability 20 % 20 %

Other Designations

Equivalent designations to UNS C12200 copper are shown in the following table.

ASME B16.22 ASTM B111 ASTM B370 ASTM B623 ASTM B88
ASME B16.29 ASTM B133 ASTM B379 ASTM B638 MIL B-18907
ASME SB111 ASTM B152 ASTM B395 ASTM B640 MIL B-20292
ASME SB133 ASTM B224 ASTM B42 ASTM B641 MIL T-22214
ASME SB152 ASTM B272 ASTM B432 ASTM B68 MIL T-24107
ASME SB359 ASTM B280 ASTM B442 ASTM B687 MIL T-3235
ASME SB395 ASTM B302 ASTM B447 ASTM B698 SAE J461
ASME SB42 ASTM B306 ASTM B5 ASTM B716 SAE J463
ASME SB543 ASTM B359 ASTM B506 ASTM B743 UNS C12200
ASME SB75 ASTM B360 ASTM B543 ASTM B75  
         

Fabrication and Heat Treatment

Machinability

The machinability rate UNS C12200 copper is 20%.

Welding

The following are the welding methods recommended for UNS C12200:

  • Soldering
  • Brazing
  • Gas shielded arc welding
  • Oxyacetylene welding
  • Butt welding

The following are the welding methods not recommended for UNS C12200

  • Coated metal arc welding
  • Spot welding
  • Seam welding

Forging

Forging of UNS C12200 is performed at hot working temperature ranging from 760 to 871°C (1400 to 1600°F). The hot forgeability rate of this alloy is 65%.

Hot Working

UNS C12200 copper has excellent hot working property.

Cold Working

C12200 copper has excellent cold working property.

Annealing

Annealing of C12200 copper is performed at temperature ranging from 371 to 649°C (700 to 1200°F).

Applications

The following are the major applications of C12200 copper:

  • Electromechanical hardware connectors
  • Bus bars

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