Spring-Tempered (H08) C23400 Brass
H08 C23400 brass is C23400 brass in the H08 (spring) temper. It has the second highest strength and lowest ductility compared to the other variants of C23400 brass. The graph bars on the material properties cards below compare H08 C23400 brass to: wrought brasses (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
3.1 %
Poisson's Ratio
0.32
Rockwell B Hardness
90
Rockwell Superficial 30T Hardness
77
Shear Modulus
42 GPa 6.1 x 106 psi
Shear Strength
350 MPa 51 x 103 psi
Tensile Strength: Ultimate (UTS)
610 MPa 89 x 103 psi
Tensile Strength: Yield (Proof)
470 MPa 68 x 103 psi
Thermal Properties
Latent Heat of Fusion
190 J/g
Maximum Temperature: Mechanical
160 °C 330 °F
Melting Completion (Liquidus)
970 °C 1780 °F
Melting Onset (Solidus)
930 °C 1700 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
120 W/m-K 68 BTU/h-ft-°F
Thermal Expansion
19 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
27 % relative
Density
8.5 g/cm3 530 lb/ft3
Embodied Carbon
2.6 kg CO2/kg material
Embodied Energy
43 MJ/kg 19 x 103 BTU/lb
Embodied Water
320 L/kg 38 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
17 MJ/m3
Resilience: Unit (Modulus of Resilience)
980 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
19 points
Thermal Diffusivity
36 mm2/s
Thermal Shock Resistance
21 points
Alloy Composition
| Cu | 81 to 84 | |
| Zn | 15.7 to 19 | |
| 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
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