S20910 Stainless Steel vs. SAE-AISI 8645 Steel
Both S20910 stainless steel and SAE-AISI 8645 steel are iron alloys. They have 60% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is S20910 stainless steel and the bottom bar is SAE-AISI 8645 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 230 to 290 | |
| 180 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 14 to 39 | |
| 12 to 23 |
| Fatigue Strength, MPa | 310 to 460 | |
| 280 to 350 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 79 | |
| 73 |
| Shear Strength, MPa | 500 to 570 | |
| 380 to 400 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 940 | |
| 600 to 670 |
| Tensile Strength: Yield (Proof), MPa | 430 to 810 | |
| 390 to 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 1080 | |
| 410 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1460 |
| Melting Onset (Solidus), °C | 1380 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 39 |
| Thermal Expansion, µm/m-K | 16 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 22 | |
| 2.6 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 4.8 | |
| 1.5 |
| Embodied Energy, MJ/kg | 68 | |
| 20 |
| Embodied Water, L/kg | 180 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 260 | |
| 77 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 460 to 1640 | |
| 420 to 840 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 28 to 33 | |
| 21 to 24 |
| Strength to Weight: Bending, points | 24 to 27 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 3.6 | |
| 10 |
| Thermal Shock Resistance, points | 17 to 21 | |
| 18 to 20 |
Alloy Composition
| Carbon (C), % | 0 to 0.060 | |
| 0.43 to 0.48 |
| Chromium (Cr), % | 20.5 to 23.5 | |
| 0.4 to 0.6 |
| Iron (Fe), % | 52.1 to 62.1 | |
| 96.5 to 97.7 |
| Manganese (Mn), % | 4.0 to 6.0 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 1.5 to 3.0 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 11.5 to 13.5 | |
| 0.4 to 0.7 |
| Niobium (Nb), % | 0.1 to 0.3 | |
| 0 |
| Nitrogen (N), % | 0.2 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.75 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.040 |
| Vanadium (V), % | 0.1 to 0.3 | |
| 0 |