Nickel 690 vs. ACI-ASTM CF20 Steel
Nickel 690 belongs to the nickel alloys classification, while ACI-ASTM CF20 steel belongs to the iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is nickel 690 and the bottom bar is ACI-ASTM CF20 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 90 | |
| 160 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 3.4 to 34 | |
| 50 |
| Fatigue Strength, MPa | 180 to 300 | |
| 240 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 79 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 640 to 990 | |
| 530 |
| Tensile Strength: Yield (Proof), MPa | 250 to 760 | |
| 250 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 1010 | |
| 970 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1420 |
| Melting Onset (Solidus), °C | 1340 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 14 | |
| 16 |
| Thermal Expansion, µm/m-K | 14 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.5 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.6 | |
| 2.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 50 | |
| 16 |
| Density, g/cm3 | 8.3 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 3.1 |
| Embodied Energy, MJ/kg | 120 | |
| 44 |
| Embodied Water, L/kg | 290 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 31 to 170 | |
| 220 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 to 1440 | |
| 160 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 21 to 33 | |
| 19 |
| Strength to Weight: Bending, points | 20 to 27 | |
| 19 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 4.3 |
| Thermal Shock Resistance, points | 16 to 25 | |
| 11 |
Alloy Composition
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.2 |
| Chromium (Cr), % | 27 to 31 | |
| 18 to 21 |
| Copper (Cu), % | 0 to 0.5 | |
| 0 |
| Iron (Fe), % | 7.0 to 11 | |
| 64.2 to 74 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0 to 1.5 |
| Nickel (Ni), % | 58 to 66 | |
| 8.0 to 11 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 2.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.040 |