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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.

Copper (Cu) 50.8 to 60
Manganese (Mn) 39 to 45
Aluminum (Al) 1.0 to 2.8
Nickel (Ni) 0 to 0.2
Iron (Fe) 0 to 0.2
Cobalt (Co) 0 to 0.2
Zinc (Zn) 0 to 0.2
Silicon (Si) 0 to 0.1
Tin (Sn) 0 to 0.1
Carbon (C) 0 to 0.050
Lead (Pb) 0 to 0.020
Residuals 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