ACI-ASTM CK20 Steel vs. C71580 Copper-nickel
ACI-ASTM CK20 steel belongs to the iron alloys classification, while C71580 copper-nickel belongs to the copper alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CK20 steel and the bottom bar is C71580 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 | |
| 75 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 140 |
| Elongation at Break, % | 37 | |
| 40 |
| Poisson's Ratio | 0.28 | |
| 0.33 |
| Shear Modulus, GPa | 78 | |
| 51 |
| Tensile Strength: Ultimate (UTS), MPa | 530 | |
| 330 |
| Tensile Strength: Yield (Proof), MPa | 260 | |
| 110 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 230 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 260 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1180 |
| Melting Onset (Solidus), °C | 1430 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 400 |
| Thermal Conductivity, W/m-K | 14 | |
| 39 |
| Thermal Expansion, µm/m-K | 15 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 4.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.3 | |
| 4.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 25 | |
| 41 |
| Density, g/cm3 | 7.8 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 4.4 | |
| 5.1 |
| Embodied Energy, MJ/kg | 62 | |
| 74 |
| Embodied Water, L/kg | 190 | |
| 280 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 | |
| 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 170 | |
| 47 |
| Stiffness to Weight: Axial, points | 14 | |
| 8.5 |
| Stiffness to Weight: Bending, points | 25 | |
| 19 |
| Strength to Weight: Axial, points | 19 | |
| 10 |
| Strength to Weight: Bending, points | 19 | |
| 12 |
| Thermal Diffusivity, mm2/s | 3.7 | |
| 11 |
| Thermal Shock Resistance, points | 13 | |
| 11 |
Alloy Composition
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.070 |
| Chromium (Cr), % | 23 to 27 | |
| 0 |
| Copper (Cu), % | 0 | |
| 65.5 to 71 |
| Iron (Fe), % | 46.7 to 58 | |
| 0 to 0.5 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 to 0.3 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 19 to 22 | |
| 29 to 33 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 2.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.050 |
| Residuals, % | 0 | |
| 0 to 0.5 |