H04 C68800 Brass vs. H04 C71520 Copper-nickel
Both H04 C68800 brass and H04 C71520 copper-nickel are copper alloys. Both are furnished in the H04 (full hard) temper. They have 69% of their average alloy composition in common.
For each property being compared, the top bar is H04 C68800 brass and the bottom bar is H04 C71520 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 140 |
| Elongation at Break, % | 6.0 | |
| 10 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Rockwell B Hardness | 96 | |
| 86 |
| Rockwell Superficial 30T Hardness | 82 | |
| 74 |
| Shear Modulus, GPa | 41 | |
| 51 |
| Shear Strength, MPa | 440 | |
| 340 |
| Tensile Strength: Ultimate (UTS), MPa | 750 | |
| 570 |
| Tensile Strength: Yield (Proof), MPa | 670 | |
| 430 |
Thermal Properties
| Latent Heat of Fusion, J/g | 190 | |
| 230 |
| Maximum Temperature: Mechanical, °C | 160 | |
| 260 |
| Melting Completion (Liquidus), °C | 960 | |
| 1170 |
| Melting Onset (Solidus), °C | 950 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 400 |
| Thermal Conductivity, W/m-K | 40 | |
| 32 |
| Thermal Expansion, µm/m-K | 19 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 18 | |
| 5.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 20 | |
| 5.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 26 | |
| 40 |
| Density, g/cm3 | 8.2 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 5.0 |
| Embodied Energy, MJ/kg | 48 | |
| 73 |
| Embodied Water, L/kg | 350 | |
| 280 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 43 | |
| 54 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2070 | |
| 680 |
| Stiffness to Weight: Axial, points | 7.3 | |
| 8.6 |
| Stiffness to Weight: Bending, points | 19 | |
| 19 |
| Strength to Weight: Axial, points | 26 | |
| 18 |
| Strength to Weight: Bending, points | 22 | |
| 17 |
| Thermal Diffusivity, mm2/s | 12 | |
| 8.9 |
| Thermal Shock Resistance, points | 26 | |
| 19 |
Alloy Composition
| Aluminum (Al), % | 3.0 to 3.8 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.050 |
| Cobalt (Co), % | 0.25 to 0.55 | |
| 0 |
| Copper (Cu), % | 70.8 to 75.5 | |
| 65 to 71.6 |
| Iron (Fe), % | 0 to 0.2 | |
| 0.4 to 1.0 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 to 0.020 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Nickel (Ni), % | 0 | |
| 28 to 33 |
| Phosphorus (P), % | 0 | |
| 0 to 0.2 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Zinc (Zn), % | 21.3 to 24.1 | |
| 0 to 0.5 |
| Residuals, % | 0 | |
| 0 to 0.5 |