UNS C95520 Nickel-Aluminum Bronze
C95520 bronze is a bronze formulated for casting. Cited properties are appropriate for the heat treated (HT) condition. It has a very high heat capacity among cast bronzes. In addition, it has the highest tensile strength and a very low ductility.
The graph bars on the material properties cards below compare C95520 bronze to: cast bronzes (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
Brinell Hardness
280
Elastic (Young's, Tensile) Modulus
120 GPa 17 x 106 psi
Elongation at Break
2.6 %
Poisson's Ratio
0.33
Shear Modulus
44 GPa 6.4 x 106 psi
Tensile Strength: Ultimate (UTS)
970 MPa 140 x 103 psi
Tensile Strength: Yield (Proof)
530 MPa 77 x 103 psi
Thermal Properties
Latent Heat of Fusion
240 J/g
Maximum Temperature: Mechanical
240 °C 460 °F
Melting Completion (Liquidus)
1070 °C 1960 °F
Melting Onset (Solidus)
1020 °C 1860 °F
Specific Heat Capacity
450 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
40 W/m-K 23 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
11 % IACS
Electrical Conductivity: Equal Weight (Specific)
12 % IACS
Otherwise Unclassified Properties
Base Metal Price
29 % relative
Density
8.2 g/cm3 510 lb/ft3
Embodied Carbon
3.6 kg CO2/kg material
Embodied Energy
58 MJ/kg 25 x 103 BTU/lb
Embodied Water
390 L/kg 47 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
21 MJ/m3
Resilience: Unit (Modulus of Resilience)
1210 kJ/m3
Stiffness to Weight: Axial
8.0 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
33 points
Strength to Weight: Bending
27 points
Thermal Diffusivity
11 mm2/s
Thermal Shock Resistance
33 points
Alloy Composition
Among cast copper alloys, the composition of C95520 bronze is notable for including cobalt (Co) and chromium (Cr). Cobalt is used to improve strength. Chromium additions permits certain types of heat treatment to improve mechanical strength.
| Cu | 74.5 to 81.3 | |
| Al | 10.5 to 11.5 | |
| Ni | 4.2 to 6.0 | |
| Fe | 4.0 to 5.5 | |
| Mn | 0 to 1.5 | |
| Zn | 0 to 0.3 | |
| Sn | 0 to 0.25 | |
| Co | 0 to 0.2 | |
| Si | 0 to 0.15 | |
| Cr | 0 to 0.050 | |
| Pb | 0 to 0.030 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B148: Standard Specification for Aluminum-Bronze Sand Castings
ASTM B271: Standard Specification for Copper-Base Alloy Centrifugal Castings
ASTM B505: Standard Specification for Copper Alloy Continuous Castings
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001