UNS C14700 Sulfurized Copper
C14700 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. It can have a moderately low tensile strength and a moderately high ductility among wrought coppers.
The properties of C14700 copper include four 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 C14700 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
9.1 to 35 %
Poisson's Ratio
0.34
Shear Modulus
43 GPa 6.3 x 106 psi
Shear Strength
160 to 190 MPa 23 to 28 x 103 psi
Tensile Strength: Ultimate (UTS)
240 to 320 MPa 34 to 47 x 103 psi
Tensile Strength: Yield (Proof)
85 to 250 MPa 12 to 37 x 103 psi
Thermal Properties
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
200 °C 390 °F
Melting Completion (Liquidus)
1080 °C 1970 °F
Melting Onset (Solidus)
1070 °C 1950 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
370 W/m-K 220 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
95 % IACS
Electrical Conductivity: Equal Weight (Specific)
96 % 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)
25 to 65 MJ/m3
Resilience: Unit (Modulus of Resilience)
31 to 280 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
7.3 to 10 points
Strength to Weight: Bending
9.5 to 12 points
Thermal Diffusivity
110 mm2/s
Thermal Shock Resistance
8.4 to 12 points
Alloy Composition
Among wrought copper alloys, the composition of C14700 copper is notable for including sulfur (S). Sulfur is used to improve machinability at the cost of a decrease in electrical conductivity.
| Cu | 99.395 to 99.798 | |
| S | 0.2 to 0.5 | |
| P | 0.0020 to 0.0050 | |
| res. | 0 to 0.1 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B301: Standard Specification for Free-Cutting Copper Rod, Bar, Wire, and Shapes
ASTM B124: Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes
ASTM B283: Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)
Copper Alloys: Preparation, Properties and Applications, Michael Naboka and Jennifer Giordano (editors), 2013
Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001