Chromium 33 vs. SAE-AISI 4720 Steel
Chromium 33 belongs to the otherwise unclassified metals classification, while SAE-AISI 4720 steel belongs to the iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 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 chromium 33 and the bottom bar is SAE-AISI 4720 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 45 | |
| 25 |
| Poisson's Ratio | 0.27 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 490 |
| Tensile Strength: Yield (Proof), MPa | 430 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 36 | |
| 2.9 |
| Density, g/cm3 | 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 6.0 | |
| 1.6 |
| Embodied Energy, MJ/kg | 84 | |
| 21 |
| Embodied Water, L/kg | 250 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 320 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 450 | |
| 330 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 30 | |
| 17 |
| Strength to Weight: Bending, points | 25 | |
| 18 |
| Thermal Shock Resistance, points | 21 | |
| 14 |
Alloy Composition
| Carbon (C), % | 0 to 0.015 | |
| 0.17 to 0.22 |
| Chromium (Cr), % | 31 to 35 | |
| 0.35 to 0.55 |
| Copper (Cu), % | 0.3 to 1.2 | |
| 0 |
| Iron (Fe), % | 25.7 to 37.9 | |
| 96.7 to 97.8 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.5 to 0.7 |
| Molybdenum (Mo), % | 0.5 to 2.0 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 30 to 33 | |
| 0.9 to 1.2 |
| Nitrogen (N), % | 0.35 to 0.6 | |
| 0 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.5 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.040 |