AISI 304 Stainless Steel vs. Nuclear Grade Hafnium
AISI 304 stainless steel belongs to the iron alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is AISI 304 stainless steel and the bottom bar is nuclear grade hafnium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 78 |
| Elongation at Break, % | 8.0 to 43 | |
| 25 |
| Poisson's Ratio | 0.28 | |
| 0.26 |
| Shear Modulus, GPa | 77 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 580 to 1180 | |
| 350 |
| Tensile Strength: Yield (Proof), MPa | 230 to 860 | |
| 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 130 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 140 |
| Thermal Expansion, µm/m-K | 17 | |
| 5.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 13 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 86 to 250 | |
| 73 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 1870 | |
| 180 |
| Stiffness to Weight: Axial, points | 14 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 25 | |
| 11 |
| Strength to Weight: Axial, points | 21 to 42 | |
| 7.4 |
| Strength to Weight: Bending, points | 20 to 32 | |
| 8.4 |
| Thermal Shock Resistance, points | 12 to 25 | |
| 55 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0 |
| Chromium (Cr), % | 18 to 20 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 99.8 to 100 |
| Iron (Fe), % | 66.5 to 74 | |
| 0 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 |
| Nickel (Ni), % | 8.0 to 10.5 | |
| 0 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.23 |