UNS C99600 Manganese Bronze
C99600 bronze is a bronze formulated for casting. It has the lowest base cost among cast bronzes. In addition, it can have the highest ductility and has the highest melting temperature.
The properties of C99600 bronze include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C99600 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
Elastic (Young's, Tensile) Modulus
150 GPa 22 x 106 psi
Elongation at Break
27 to 34 %
Poisson's Ratio
0.34
Shear Modulus
56 GPa 8.1 x 106 psi
Tensile Strength: Ultimate (UTS)
560 MPa 81 x 103 psi
Tensile Strength: Yield (Proof)
250 to 300 MPa 36 to 44 x 103 psi
Thermal Properties
Latent Heat of Fusion
240 J/g
Maximum Temperature: Mechanical
200 °C 400 °F
Melting Completion (Liquidus)
1100 °C 2020 °F
Melting Onset (Solidus)
1050 °C 1920 °F
Specific Heat Capacity
440 J/kg-K 0.1 BTU/lb-°F
Thermal Expansion
19 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
22 % relative
Density
8.1 g/cm3 500 lb/ft3
Embodied Carbon
3.2 kg CO2/kg material
Embodied Energy
51 MJ/kg 22 x 103 BTU/lb
Embodied Water
300 L/kg 36 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
130 to 150 MJ/m3
Resilience: Unit (Modulus of Resilience)
210 to 310 kJ/m3
Stiffness to Weight: Axial
10 points
Stiffness to Weight: Bending
22 points
Strength to Weight: Axial
19 points
Strength to Weight: Bending
19 points
Thermal Shock Resistance
14 points
Alloy Composition
Among cast copper alloys, the composition of C99600 bronze is notable for including cobalt (Co). Cobalt is used to improve strength.
| Cu | 50.8 to 60 | |
| Mn | 39 to 45 | |
| Al | 1.0 to 2.8 | |
| Ni | 0 to 0.2 | |
| Fe | 0 to 0.2 | |
| Co | 0 to 0.2 | |
| Zn | 0 to 0.2 | |
| Si | 0 to 0.1 | |
| Sn | 0 to 0.1 | |
| C | 0 to 0.050 | |
| Pb | 0 to 0.020 | |
| res. | 0 to 0.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993