3/4-Hard (H03) C66700 Brass
H03 C66700 brass is C66700 brass in the H03 (3/4 hard) temper. The graph bars on the material properties cards below compare H03 C66700 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
13 %
Poisson's Ratio
0.31
Rockwell B Hardness
78
Rockwell Superficial 30T Hardness
69
Shear Modulus
41 GPa 6.0 x 106 psi
Shear Strength
300 MPa 43 x 103 psi
Tensile Strength: Ultimate (UTS)
490 MPa 71 x 103 psi
Tensile Strength: Yield (Proof)
460 MPa 66 x 103 psi
Thermal Properties
Latent Heat of Fusion
180 J/g
Maximum Temperature: Mechanical
140 °C 290 °F
Melting Completion (Liquidus)
1090 °C 2000 °F
Melting Onset (Solidus)
1050 °C 1920 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
97 W/m-K 56 BTU/h-ft-°F
Thermal Expansion
20 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
17 % IACS
Electrical Conductivity: Equal Weight (Specific)
19 % IACS
Otherwise Unclassified Properties
Base Metal Price
25 % relative
Density
8.2 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)
62 MJ/m3
Resilience: Unit (Modulus of Resilience)
960 kJ/m3
Stiffness to Weight: Axial
7.3 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
17 points
Thermal Diffusivity
30 mm2/s
Thermal Shock Resistance
16 points
Alloy Composition
| Cu | 68.5 to 71.5 | |
| Zn | 26.3 to 30.7 | |
| Mn | 0.8 to 1.5 | |
| Fe | 0 to 0.1 | |
| Pb | 0 to 0.070 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993