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UNS C12600 Fire-Refined Tough Pitch Copper

C12600 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. Cited properties are appropriate for the O61 (annealed) temper.

It has a fairly high ductility among wrought coppers. In addition, it has a moderately low thermal conductivity and a moderately low electrical conductivity.

The graph bars on the material properties cards below compare C12600 copper to: wrought coppers (top), all copper alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

120 GPa 17 x 106 psi

Elongation at Break

56 %

Poisson's Ratio

0.34

Shear Modulus

56 GPa 8.1 x 106 psi

Shear Strength

190 MPa 28 x 103 psi

Tensile Strength: Ultimate (UTS)

270 MPa 39 x 103 psi

Tensile Strength: Yield (Proof)

69 MPa 10 x 103 psi

Thermal Properties

Latent Heat of Fusion

210 J/g

Maximum Temperature: Mechanical

200 °C 390 °F

Melting Completion (Liquidus)

1080 °C 1980 °F

Melting Onset (Solidus)

1030 °C 1880 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

130 W/m-K 77 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

29 % IACS

Electrical Conductivity: Equal Weight (Specific)

29 % IACS

Otherwise Unclassified Properties

Base Metal Price

30 % relative

Density

8.9 g/cm3 560 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

41 MJ/kg 18 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

110 MJ/m3

Resilience: Unit (Modulus of Resilience)

21 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

8.2 points

Strength to Weight: Bending

10 points

Thermal Diffusivity

39 mm2/s

Thermal Shock Resistance

9.5 points

Alloy Composition

Among wrought copper alloys, the composition of C12600 copper is notable for including phosphorus (P). Phosphorus is used as an alloy deoxidizer, and to reduce vulnerability to dezincification.

Copper (Cu) 99.5 to 99.8
Phosphorus (P) 0.2 to 0.4

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

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