UNS C19700 Iron-Bearing Copper
C19700 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. It can have a moderately low ductility among the wrought coppers in the database.
The properties of C19700 copper include five 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 C19700 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
2.4 to 13 %
Poisson's Ratio
0.34
Rockwell B Hardness
67 to 75
Rockwell Superficial 30T Hardness
65 to 72
Shear Modulus
43 GPa 6.3 x 106 psi
Shear Strength
240 to 300 MPa 35 to 44 x 103 psi
Tensile Strength: Ultimate (UTS)
400 to 530 MPa 58 to 77 x 103 psi
Tensile Strength: Yield (Proof)
330 to 520 MPa 47 to 75 x 103 psi
Thermal Properties
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
200 °C 390 °F
Melting Completion (Liquidus)
1090 °C 2000 °F
Melting Onset (Solidus)
1040 °C 1900 °F
Specific Heat Capacity
390 J/kg-K 0.093 BTU/lb-°F
Thermal Conductivity
250 W/m-K 140 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
86 to 88 % IACS
Electrical Conductivity: Equal Weight (Specific)
87 to 89 % 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)
12 to 49 MJ/m3
Resilience: Unit (Modulus of Resilience)
460 to 1160 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
12 to 16 points
Strength to Weight: Bending
14 to 16 points
Thermal Diffusivity
73 mm2/s
Thermal Shock Resistance
14 to 19 points
Alloy Composition
Among wrought copper alloys, the composition of C19700 copper is notable for including magnesium (Mg) and cobalt (Co). Magnesium is used to improve strain hardenability. This increases strength but reduces the ability to form the alloy into complex shapes. Cobalt is used to improve strength.
| Cu | 97.4 to 99.59 | |
| Fe | 0.3 to 1.2 | |
| P | 0.1 to 0.4 | |
| Mg | 0.010 to 0.2 | |
| Sn | 0 to 0.2 | |
| Zn | 0 to 0.2 | |
| Mn | 0 to 0.050 | |
| Ni | 0 to 0.050 | |
| Co | 0 to 0.050 | |
| Pb | 0 to 0.050 | |
| res. | 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 Alloys: Preparation, Properties and Applications, Michael Naboka and Jennifer Giordano (editors), 2013