SAE-AISI T8 Steel vs. R05255 Alloy
SAE-AISI T8 steel belongs to the iron alloys classification, while R05255 alloy belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI T8 steel and the bottom bar is R05255 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 78 | |
| 70 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 2140 | |
| 540 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 140 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 140 |
| Thermal Conductivity, W/m-K | 18 | |
| 59 |
| Thermal Expansion, µm/m-K | 12 | |
| 6.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.0 | |
| 17 |
| Embodied Water, L/kg | 120 | |
| 630 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 6.3 |
| Stiffness to Weight: Bending, points | 22 | |
| 11 |
| Strength to Weight: Axial, points | 24 to 66 | |
| 9.1 |
| Strength to Weight: Bending, points | 21 to 41 | |
| 8.9 |
| Thermal Diffusivity, mm2/s | 4.8 | |
| 25 |
| Thermal Shock Resistance, points | 24 to 66 | |
| 31 |
Alloy Composition
| Carbon (C), % | 0.75 to 0.85 | |
| 0 to 0.010 |
| Chromium (Cr), % | 3.8 to 4.5 | |
| 0 |
| Cobalt (Co), % | 4.3 to 5.8 | |
| 0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.0015 |
| Iron (Fe), % | 69.3 to 75.4 | |
| 0 to 0.010 |
| Manganese (Mn), % | 0.2 to 0.4 | |
| 0 |
| Molybdenum (Mo), % | 0.4 to 1.0 | |
| 0 to 0.020 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 to 0.010 |
| Niobium (Nb), % | 0 | |
| 0 to 0.5 |
| Nitrogen (N), % | 0 | |
| 0 to 0.010 |
| Oxygen (O), % | 0 | |
| 0 to 0.015 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 0.2 to 0.4 | |
| 0 to 0.0050 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tantalum (Ta), % | 0 | |
| 95.9 to 98 |
| Titanium (Ti), % | 0 | |
| 0 to 0.010 |
| Tungsten (W), % | 13.3 to 14.8 | |
| 2.0 to 3.5 |
| Vanadium (V), % | 1.8 to 2.4 | |
| 0 |