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UNS C19400 (CW107C) Iron-Bearing Copper

C19400 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. CW107C is the EN numeric designation for this material. C19400 is the UNS number. Additionally, the EN chemical designation is CuFe2P.

It has the lowest embodied energy among the wrought coppers in the database.

The properties of C19400 copper include nine 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 C19400 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

2.3 to 37 %

Poisson's Ratio


Rockwell Superficial 30T Hardness

59 to 78

Shear Modulus

44 GPa 6.4 x 106 psi

Shear Strength

210 to 300 MPa 30 to 44 x 103 psi

Tensile Strength: Ultimate (UTS)

310 to 630 MPa 45 to 91 x 103 psi

Tensile Strength: Yield (Proof)

98 to 520 MPa 14 to 75 x 103 psi

Thermal Properties

Latent Heat of Fusion

210 J/g

Maximum Temperature: Mechanical

200 °C 400 °F

Melting Completion (Liquidus)

1090 °C 1990 °F

Melting Onset (Solidus)

1080 °C 1980 °F

Specific Heat Capacity

390 J/kg-K 0.093 BTU/lb-°F

Thermal Conductivity

260 W/m-K 150 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

58 to 68 % IACS

Electrical Conductivity: Equal Weight (Specific)

58 to 69 % IACS

Otherwise Unclassified Properties

Base Metal Price

30 % relative


8.9 g/cm3 560 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

40 MJ/kg 17 x 103 BTU/lb

Embodied Water

300 L/kg 36 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

5.5 to 220 MJ/m3

Resilience: Unit (Modulus of Resilience)

41 to 1140 kJ/m3

Stiffness to Weight: Axial

7.3 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

9.7 to 20 points

Strength to Weight: Bending

11 to 18 points

Thermal Diffusivity

75 mm2/s

Thermal Shock Resistance

11 to 22 points

Alloy Composition

Among wrought copper alloys, the composition of C19400 copper is notable for including phosphorus (P) and containing a comparatively high amount of iron (Fe). Phosphorus is used as an alloy deoxidizer, and to reduce vulnerability to dezincification. Iron is used to increase strength inexpensively.

Copper (Cu)Cu 96.8 to 97.8
Iron (Fe)Fe 2.1 to 2.6
Zinc (Zn)Zn 0.050 to 0.2
Phosphorus (P)P 0.015 to 0.15
Lead (Pb)Pb 0 to 0.030
Residualsres. 0 to 0.2

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

Followup Questions

Similar Alloys

Further Reading

ASTM B465: Standard Specification for Copper-Iron Alloy Plate, Sheet, Strip, and Rolled Bar

Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001