UNS C19500 Iron-Cobalt-Tin Copper
C19500 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. It has the highest melting temperature and a moderately low thermal conductivity among wrought coppers.
The properties of C19500 copper include seven 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 C19500 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 38 %
Poisson's Ratio
0.34
Rockwell B Hardness
71 to 86
Rockwell Superficial 30T Hardness
66 to 76
Shear Modulus
44 GPa 6.3 x 106 psi
Shear Strength
260 to 360 MPa 37 to 53 x 103 psi
Tensile Strength: Ultimate (UTS)
380 to 640 MPa 55 to 93 x 103 psi
Tensile Strength: Yield (Proof)
120 to 600 MPa 17 to 87 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)
1090 °C 1990 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
200 W/m-K 120 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
50 to 56 % IACS
Electrical Conductivity: Equal Weight (Specific)
50 to 57 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
2.7 kg CO2/kg material
Embodied Energy
42 MJ/kg 18 x 103 BTU/lb
Embodied Water
310 L/kg 37 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
14 to 110 MJ/m3
Resilience: Unit (Modulus of Resilience)
59 to 1530 kJ/m3
Stiffness to Weight: Axial
7.3 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
12 to 20 points
Strength to Weight: Bending
13 to 18 points
Thermal Diffusivity
58 mm2/s
Thermal Shock Resistance
13 to 23 points
Alloy Composition
Among wrought copper alloys, the composition of C19500 copper is notable for including cobalt (Co) and aluminum (Al). Cobalt is used to improve strength. Aluminum is used to add strength and oxidation resistance.
| Cu | 94.9 to 98.6 | |
| Fe | 1.0 to 2.0 | |
| Co | 0.3 to 1.3 | |
| Sn | 0.1 to 1.0 | |
| P | 0.010 to 0.35 | |
| Zn | 0 to 0.2 | |
| Al | 0 to 0.020 | |
| Pb | 0 to 0.020 | |
| 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