Spring-Tempered (H08) C22000 Bronze
H08 C22000 bronze is C22000 bronze in the H08 (spring) temper. It has the second highest strength and second lowest ductility compared to the other variants of C22000 bronze. The graph bars on the material properties cards below compare H08 C22000 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
3.0 %
Fatigue Strength
150 MPa 21 x 103 psi
Poisson's Ratio
0.33
Rockwell B Hardness
78
Rockwell Superficial 30T Hardness
72
Shear Modulus
42 GPa 6.2 x 106 psi
Shear Strength
290 MPa 42 x 103 psi
Tensile Strength: Ultimate (UTS)
500 MPa 73 x 103 psi
Tensile Strength: Yield (Proof)
430 MPa 62 x 103 psi
Thermal Properties
Latent Heat of Fusion
200 J/g
Maximum Temperature: Mechanical
180 °C 360 °F
Melting Completion (Liquidus)
1040 °C 1910 °F
Melting Onset (Solidus)
1020 °C 1870 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
190 W/m-K 110 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
44 % IACS
Electrical Conductivity: Equal Weight (Specific)
45 % IACS
Otherwise Unclassified Properties
Base Metal Price
29 % relative
Density
8.7 g/cm3 540 lb/ft3
Embodied Carbon
2.6 kg CO2/kg material
Embodied Energy
42 MJ/kg 18 x 103 BTU/lb
Embodied Water
310 L/kg 37 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
14 MJ/m3
Resilience: Unit (Modulus of Resilience)
800 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
16 points
Strength to Weight: Bending
16 points
Thermal Diffusivity
56 mm2/s
Thermal Shock Resistance
17 points
Alloy Composition
| Cu | 89 to 91 | |
| Zn | 8.7 to 11 | |
| Fe | 0 to 0.050 | |
| Pb | 0 to 0.050 | |
| res. | 0 to 0.2 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B134: Standard Specification for Brass Wire
ASTM B36: Standard Specification for Brass Plate, Sheet, Strip, And Rolled Bar
Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993