SAE-AISI 1022 Steel vs. SAE-AISI 8645 Steel
Both SAE-AISI 1022 steel and SAE-AISI 8645 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 1022 steel and the bottom bar is SAE-AISI 8645 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 to 160 | |
| 180 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 17 to 26 | |
| 12 to 23 |
| Fatigue Strength, MPa | 190 to 300 | |
| 280 to 350 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 310 to 340 | |
| 380 to 400 |
| Tensile Strength: Ultimate (UTS), MPa | 480 to 550 | |
| 600 to 670 |
| Tensile Strength: Yield (Proof), MPa | 260 to 450 | |
| 390 to 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 410 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 52 | |
| 39 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.0 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 2.6 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.5 |
| Embodied Energy, MJ/kg | 18 | |
| 20 |
| Embodied Water, L/kg | 46 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 88 to 110 | |
| 77 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 190 to 530 | |
| 420 to 840 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 17 to 19 | |
| 21 to 24 |
| Strength to Weight: Bending, points | 17 to 19 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 14 | |
| 10 |
| Thermal Shock Resistance, points | 15 to 17 | |
| 18 to 20 |
Alloy Composition
| Carbon (C), % | 0.18 to 0.23 | |
| 0.43 to 0.48 |
| Chromium (Cr), % | 0 | |
| 0.4 to 0.6 |
| Iron (Fe), % | 98.7 to 99.12 | |
| 96.5 to 97.7 |
| Manganese (Mn), % | 0.7 to 1.0 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 0 | |
| 0.4 to 0.7 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.040 |