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UNS C10800 Oxygen-Free Low-Phosphorus Copper

C10800 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. C10800 is the UNS number for this material. Additionally, the AFNOR (French) designation is Cu-b2. It can have a moderately low tensile strength among the wrought coppers in the database.

The properties of C10800 copper include ten common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C10800 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

4.0 to 50 %

Poisson's Ratio


Rockwell B Hardness

10 to 60

Rockwell F Hardness

40 to 95

Rockwell Superficial 30T Hardness

27 to 63

Shear Modulus

43 GPa 6.3 x 106 psi

Shear Strength

150 to 200 MPa 22 to 29 x 103 psi

Tensile Strength: Ultimate (UTS)

220 to 380 MPa 32 to 55 x 103 psi

Tensile Strength: Yield (Proof)

75 to 370 MPa 11 to 54 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)

1080 °C 1980 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

350 W/m-K 200 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

92 % IACS

Electrical Conductivity: Equal Weight (Specific)

92 % IACS

Otherwise Unclassified Properties

Base Metal Price

31 % relative


9.0 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)

15 to 88 MJ/m3

Resilience: Unit (Modulus of Resilience)

24 to 600 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

6.8 to 12 points

Strength to Weight: Bending

9.1 to 13 points

Thermal Diffusivity

100 mm2/s

Thermal Shock Resistance

7.8 to 13 points

Alloy Composition

Among wrought copper alloys, the composition of C10800 copper is notable for including phosphorus (P). Phosphorus is used as an alloy deoxidizer, and to reduce vulnerability to dezincification.

Copper (Cu)Cu 99.95 to 99.995
Phosphorus (P)P 0.0050 to 0.012

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

Followup Questions

Similar Alloys

Further Reading

ASTM B111: Standard Specification for Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock

ASTM B152: Standard Specification for Copper Sheet, Strip, Plate, and Rolled Bar