MakeItFrom.com
Menu (ESC)

UNS C90400 Tin Bronze

C90400 bronze is a bronze formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has a fairly high thermal conductivity among cast bronzes. In addition, it has a fairly high ductility and a moderately high base cost.

The graph bars on the material properties cards below compare C90400 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

77

Elastic (Young's, Tensile) Modulus

110 GPa 16 x 106 psi

Elongation at Break

24 %

Poisson's Ratio

0.34

Shear Modulus

41 GPa 5.9 x 106 psi

Tensile Strength: Ultimate (UTS)

310 MPa 45 x 103 psi

Tensile Strength: Yield (Proof)

180 MPa 26 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

990 °C 1810 °F

Melting Onset (Solidus)

850 °C 1570 °F

Specific Heat Capacity

370 J/kg-K 0.089 BTU/lb-°F

Thermal Conductivity

75 W/m-K 43 BTU/h-ft-°F

Thermal Expansion

18 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

8.7 g/cm3 540 lb/ft3

Embodied Carbon

3.5 kg CO2/kg material

Embodied Energy

56 MJ/kg 24 x 103 BTU/lb

Embodied Water

370 L/kg 44 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

65 MJ/m3

Resilience: Unit (Modulus of Resilience)

150 kJ/m3

Stiffness to Weight: Axial

7.0 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

10 points

Strength to Weight: Bending

12 points

Thermal Diffusivity

23 mm2/s

Thermal Shock Resistance

11 points

Alloy Composition

Among cast copper alloys, the composition of C90400 bronze is notable for including zirconium (Zr). Zirconium is used to increase recrystallization temperature and to permit or facilitate certain forms of heat treatment.

Copper (Cu) 86 to 89
Tin (Sn) 7.5 to 8.5
Zinc (Zn) 1.0 to 5.0
Nickel (Ni) 0 to 1.0
Sulfur (S) 0.1 to 0.65
Iron (Fe) 0 to 0.4
Boron (B) 0 to 0.1
Zirconium (Zr) 0 to 0.1
Lead (Pb) 0 to 0.090
Phosphorus (P) 0 to 0.050
Antimony (Sb) 0 to 0.020
Manganese (Mn) 0 to 0.010
Silicon (Si) 0 to 0.0050
Aluminum (Al) 0 to 0.0050
Residuals 0 to 0.7

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

Followup Questions

Similar Alloys

Further Reading

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993

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