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UNS C94800 Nickel-Tin Bronze

C94800 bronze is a bronze formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. C94800 is the UNS number for this material. Additionally, the common industry name is Nickel-Tin Bronze B.

It has a moderately low thermal conductivity among cast bronzes. In addition, it has a moderately high ductility and a moderately high base cost.

The graph bars on the material properties cards below compare C94800 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

110 GPa 17 x 106 psi

Elongation at Break

22 %

Poisson's Ratio

0.34

Shear Modulus

43 GPa 6.2 x 106 psi

Tensile Strength: Ultimate (UTS)

310 MPa 45 x 103 psi

Tensile Strength: Yield (Proof)

160 MPa 23 x 103 psi

Thermal Properties

Latent Heat of Fusion

200 J/g

Maximum Temperature: Mechanical

190 °C 370 °F

Melting Completion (Liquidus)

1030 °C 1880 °F

Melting Onset (Solidus)

900 °C 1660 °F

Specific Heat Capacity

380 J/kg-K 0.090 BTU/lb-°F

Thermal Conductivity

39 W/m-K 23 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

12 % IACS

Electrical Conductivity: Equal Weight (Specific)

12 % IACS

Otherwise Unclassified Properties

Base Metal Price

34 % relative

Density

8.8 g/cm3 550 lb/ft3

Embodied Carbon

3.5 kg CO2/kg material

Embodied Energy

56 MJ/kg 24 x 103 BTU/lb

Embodied Water

350 L/kg 41 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

58 MJ/m3

Resilience: Unit (Modulus of Resilience)

110 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

9.8 points

Strength to Weight: Bending

12 points

Thermal Diffusivity

12 mm2/s

Thermal Shock Resistance

11 points

Alloy Composition

Among cast copper alloys, the composition of C94800 bronze is notable for containing a comparatively high amount of nickel (Ni) and including manganese (Mn). Nickel is used to improve strength (particularly at elevated temperatures) and corrosion resistance. It also creates the need for additional care during casting. Manganese is used to improve strength without a proportional reduction in ductility.

Copper (Cu) 84 to 89
Nickel (Ni) 4.5 to 6.0
Tin (Sn) 4.5 to 6.0
Zinc (Zn) 1.0 to 2.5
Lead (Pb) 0.3 to 1.0
Iron (Fe) 0 to 0.25
Manganese (Mn) 0 to 0.2
Antimony (Sb) 0 to 0.15
Phosphorus (P) 0 to 0.050
Sulfur (S) 0 to 0.050
Silicon (Si) 0 to 0.0050
Aluminum (Al) 0 to 0.0050
Residuals 0 to 1.3

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B505: Standard Specification for Copper Alloy Continuous Castings

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015