SAE-AISI 81B45 Steel vs. N08221 Nickel
SAE-AISI 81B45 steel belongs to the iron alloys classification, while N08221 nickel belongs to the nickel alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 81B45 steel and the bottom bar is N08221 nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 12 to 24 | |
| 34 |
| Fatigue Strength, MPa | 250 to 350 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 79 |
| Shear Strength, MPa | 340 to 400 | |
| 410 |
| Tensile Strength: Ultimate (UTS), MPa | 540 to 670 | |
| 610 |
| Tensile Strength: Yield (Proof), MPa | 350 to 560 | |
| 270 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 310 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 980 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1440 |
| Melting Onset (Solidus), °C | 1420 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 460 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.3 | |
| 44 |
| Density, g/cm3 | 7.8 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 7.9 |
| Embodied Energy, MJ/kg | 20 | |
| 110 |
| Embodied Water, L/kg | 49 | |
| 240 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 110 | |
| 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 320 to 840 | |
| 170 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 19 to 24 | |
| 21 |
| Strength to Weight: Bending, points | 19 to 22 | |
| 19 |
| Thermal Shock Resistance, points | 17 to 21 | |
| 16 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.2 |
| Boron (B), % | 0.00050 to 0.0030 | |
| 0 |
| Carbon (C), % | 0.43 to 0.48 | |
| 0 to 0.025 |
| Chromium (Cr), % | 0.35 to 0.55 | |
| 20 to 22 |
| Copper (Cu), % | 0 | |
| 1.5 to 3.0 |
| Iron (Fe), % | 97 to 98 | |
| 22 to 33.9 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0.080 to 0.15 | |
| 5.0 to 6.5 |
| Nickel (Ni), % | 0.2 to 0.4 | |
| 39 to 46 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.050 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 | |
| 0.6 to 1.0 |