Full-Hard (H04) C63800 Bronze
H04 C63800 bronze is C63800 bronze in the H04 (full hard) temper. It has the second lowest ductility compared to the other variants of C63800 bronze. The graph bars on the material properties cards below compare H04 C63800 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 17 x 106 psi
Elongation at Break
13 %
Poisson's Ratio
0.34
Rockwell B Hardness
99
Rockwell Superficial 30T Hardness
82
Shear Modulus
43 GPa 6.2 x 106 psi
Shear Strength
500 MPa 73 x 103 psi
Tensile Strength: Ultimate (UTS)
830 MPa 120 x 103 psi
Tensile Strength: Yield (Proof)
510 MPa 74 x 103 psi
Thermal Properties
Latent Heat of Fusion
240 J/g
Maximum Temperature: Mechanical
200 °C 400 °F
Melting Completion (Liquidus)
1030 °C 1880 °F
Melting Onset (Solidus)
1000 °C 1830 °F
Specific Heat Capacity
410 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
40 W/m-K 23 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
10 % IACS
Electrical Conductivity: Equal Weight (Specific)
10 % IACS
Otherwise Unclassified Properties
Base Metal Price
30 % relative
Density
8.6 g/cm3 540 lb/ft3
Embodied Carbon
2.8 kg CO2/kg material
Embodied Energy
45 MJ/kg 19 x 103 BTU/lb
Embodied Water
330 L/kg 39 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
94 MJ/m3
Resilience: Unit (Modulus of Resilience)
1130 kJ/m3
Stiffness to Weight: Axial
7.4 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
27 points
Strength to Weight: Bending
23 points
Thermal Diffusivity
11 mm2/s
Thermal Shock Resistance
30 points
Alloy Composition
| Cu | 92.4 to 95.8 | |
| Al | 2.5 to 3.1 | |
| Si | 1.5 to 2.1 | |
| Co | 0.25 to 0.55 | |
| Zn | 0 to 0.8 | |
| Ni | 0 to 0.2 | |
| Fe | 0 to 0.2 | |
| Mn | 0 to 0.1 | |
| Pb | 0 to 0.050 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B422: Standard Specification for Copper-Aluminum-Silicon-Cobalt Alloy, Copper-Nickel-Silicon-Magnesium Alloy, Copper-Nickel-Silicon Alloy, Copper-Nickel-Aluminum-Magnesium Alloy, and Copper- Nickel-Tin Alloy Sheet and Strip
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