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UNS C62500 Aluminum-Iron Bronze

C62500 bronze is a bronze formulated for primary forming into wrought products. Cited properties are appropriate for the M30 (as hot extruded) condition. It has the lowest ductility among wrought bronzes. In addition, it has the highest heat capacity and a fairly high melting temperature.

The graph bars on the material properties cards below compare C62500 bronze to: wrought 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 16 x 106 psi

Elongation at Break

1.0 %

Fatigue Strength

460 MPa 67 x 103 psi

Poisson's Ratio

0.34

Rockwell B Hardness

29

Shear Modulus

42 GPa 6.2 x 106 psi

Shear Strength

410 MPa 60 x 103 psi

Tensile Strength: Ultimate (UTS)

690 MPa 100 x 103 psi

Tensile Strength: Yield (Proof)

410 MPa 60 x 103 psi

Thermal Properties

Latent Heat of Fusion

230 J/g

Maximum Temperature: Mechanical

230 °C 450 °F

Melting Completion (Liquidus)

1050 °C 1930 °F

Melting Onset (Solidus)

1050 °C 1920 °F

Specific Heat Capacity

460 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

47 W/m-K 27 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

10 % IACS

Electrical Conductivity: Equal Weight (Specific)

11 % IACS

Otherwise Unclassified Properties

Base Metal Price

26 % relative

Density

8.1 g/cm3 500 lb/ft3

Embodied Carbon

3.3 kg CO2/kg material

Embodied Energy

55 MJ/kg 24 x 103 BTU/lb

Embodied Water

410 L/kg 49 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

6.0 MJ/m3

Resilience: Unit (Modulus of Resilience)

750 kJ/m3

Stiffness to Weight: Axial

7.8 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

24 points

Strength to Weight: Bending

22 points

Thermal Diffusivity

13 mm2/s

Thermal Shock Resistance

24 points

Alloy Composition

Among wrought copper alloys, the composition of C62500 bronze is notable for including aluminum (Al) and containing a comparatively high amount of iron (Fe). Aluminum is used to add strength and oxidation resistance. Iron is used to increase strength inexpensively.

Copper (Cu) 78.5 to 84
Aluminum (Al) 12.5 to 13.5
Iron (Fe) 3.5 to 5.5
Manganese (Mn) 0 to 2.0
Residuals 0 to 0.5

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

Followup Questions

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