Spring-Tempered (H08) C53400 Bronze
H08 C53400 bronze is C53400 bronze in the H08 (spring) temper. It has the second highest strength and lowest ductility compared to the other variants of C53400 bronze. The graph bars on the material properties cards below compare H08 C53400 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
5.5 %
Poisson's Ratio
0.34
Rockwell B Hardness
92
Rockwell Superficial 30T Hardness
78
Shear Modulus
42 GPa 6.0 x 106 psi
Shear Strength
390 MPa 57 x 103 psi
Tensile Strength: Ultimate (UTS)
670 MPa 98 x 103 psi
Thermal Properties
Latent Heat of Fusion
200 J/g
Maximum Temperature: Mechanical
180 °C 360 °F
Melting Completion (Liquidus)
1050 °C 1920 °F
Melting Onset (Solidus)
950 °C 1750 °F
Specific Heat Capacity
380 J/kg-K 0.090 BTU/lb-°F
Thermal Conductivity
69 W/m-K 40 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
15 % IACS
Electrical Conductivity: Equal Weight (Specific)
15 % IACS
Otherwise Unclassified Properties
Base Metal Price
32 % relative
Density
8.9 g/cm3 550 lb/ft3
Embodied Carbon
3.0 kg CO2/kg material
Embodied Energy
49 MJ/kg 21 x 103 BTU/lb
Embodied Water
350 L/kg 41 gal/lb
Common Calculations
Stiffness to Weight: Axial
7.0 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
19 points
Thermal Diffusivity
21 mm2/s
Thermal Shock Resistance
24 points
Alloy Composition
| Cu | 91.8 to 95.7 | |
| Sn | 3.5 to 5.8 | |
| Pb | 0.8 to 1.2 | |
| P | 0.030 to 0.35 | |
| Zn | 0 to 0.3 | |
| Fe | 0 to 0.1 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B103: Standard Specification for Phosphor Bronze Plate, Sheet, Strip, and Rolled Bar
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001