AISI 418 Stainless Steel vs. Grade TDC Steel
Both AISI 418 stainless steel and grade TDC steel are iron alloys. They have 82% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is grade TDC steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 330 | |
| 510 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Reduction in Area, % | 50 | |
| 50 |
| Shear Modulus, GPa | 77 | |
| 80 |
| Tensile Strength: Ultimate (UTS), MPa | 1100 | |
| 1700 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 770 | |
| 400 |
| Melting Completion (Liquidus), °C | 1500 | |
| 1450 |
| Melting Onset (Solidus), °C | 1460 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 25 | |
| 51 |
| Thermal Expansion, µm/m-K | 10 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.8 | |
| 7.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.1 | |
| 8.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 1.9 |
| Density, g/cm3 | 8.0 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 1.4 |
| Embodied Energy, MJ/kg | 41 | |
| 19 |
| Embodied Water, L/kg | 110 | |
| 47 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 38 | |
| 60 |
| Strength to Weight: Bending, points | 29 | |
| 40 |
| Thermal Diffusivity, mm2/s | 6.7 | |
| 14 |
| Thermal Shock Resistance, points | 40 | |
| 50 |
Alloy Composition
| Carbon (C), % | 0.15 to 0.2 | |
| 0.6 to 0.75 |
| Chromium (Cr), % | 12 to 14 | |
| 0 to 0.3 |
| Copper (Cu), % | 0 | |
| 0 to 0.1 |
| Iron (Fe), % | 78.5 to 83.6 | |
| 98 to 99.4 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0.5 to 1.2 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 1.8 to 2.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.5 | |
| 0.1 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.020 |
| Tungsten (W), % | 2.5 to 3.5 | |
| 0 |