SAE-AISI 8645 Steel vs. R05252 Alloy
SAE-AISI 8645 steel belongs to the iron alloys classification, while R05252 alloy belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is SAE-AISI 8645 steel and the bottom bar is R05252 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 12 to 23 | |
| 23 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 600 to 670 | |
| 310 |
| Tensile Strength: Yield (Proof), MPa | 390 to 560 | |
| 220 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 140 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 140 |
| Thermal Expansion, µm/m-K | 13 | |
| 6.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 17 |
| Embodied Water, L/kg | 50 | |
| 600 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 120 | |
| 63 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 420 to 840 | |
| 120 |
| Stiffness to Weight: Axial, points | 13 | |
| 6.5 |
| Stiffness to Weight: Bending, points | 24 | |
| 12 |
| Strength to Weight: Axial, points | 21 to 24 | |
| 5.2 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 6.1 |
| Thermal Shock Resistance, points | 18 to 20 | |
| 17 |
Alloy Composition
| Carbon (C), % | 0.43 to 0.48 | |
| 0 to 0.010 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.0015 |
| Iron (Fe), % | 96.5 to 97.7 | |
| 0 to 0.010 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0 to 0.020 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 0 to 0.010 |
| Niobium (Nb), % | 0 | |
| 0 to 0.1 |
| Nitrogen (N), % | 0 | |
| 0 to 0.010 |
| Oxygen (O), % | 0 | |
| 0 to 0.015 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.0050 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 |
| Tantalum (Ta), % | 0 | |
| 88.8 to 91 |
| Titanium (Ti), % | 0 | |
| 0 to 0.010 |
| Tungsten (W), % | 0 | |
| 9.0 to 11 |