Spring-Tempered (H08) C27000 Brass
H08 C27000 brass is C27000 brass in the H08 (spring) temper. It has the second highest strength and lowest ductility compared to the other variants of C27000 brass. The graph bars on the material properties cards below compare H08 C27000 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 15 x 106 psi
Elongation at Break
3.0 %
Poisson's Ratio
0.31
Rockwell B Hardness
90
Rockwell Superficial 30T Hardness
77
Shear Modulus
40 GPa 5.9 x 106 psi
Shear Strength
360 MPa 52 x 103 psi
Tensile Strength: Ultimate (UTS)
630 MPa 91 x 103 psi
Tensile Strength: Yield (Proof)
420 MPa 61 x 103 psi
Thermal Properties
Latent Heat of Fusion
180 J/g
Maximum Temperature: Mechanical
130 °C 270 °F
Melting Completion (Liquidus)
930 °C 1710 °F
Melting Onset (Solidus)
900 °C 1660 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
120 W/m-K 67 BTU/h-ft-°F
Thermal Expansion
20 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
27 % IACS
Electrical Conductivity: Equal Weight (Specific)
30 % IACS
Otherwise Unclassified Properties
Base Metal Price
24 % relative
Density
8.1 g/cm3 510 lb/ft3
Embodied Carbon
2.7 kg CO2/kg material
Embodied Energy
45 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)
830 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
20 points
Thermal Diffusivity
37 mm2/s
Thermal Shock Resistance
21 points
Alloy Composition
| Cu | 63 to 68.5 | |
| Zn | 31 to 37 | |
| Fe | 0 to 0.1 | |
| Pb | 0 to 0.070 | |
| res. | 0 to 0.3 |
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