SAE-AISI A7 Steel vs. Chromium 33
SAE-AISI A7 steel belongs to the iron alloys classification, while chromium 33 belongs to the otherwise unclassified metals. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 17 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is chromium 33.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Poisson's Ratio | 0.29 | |
| 0.27 |
| Shear Modulus, GPa | 72 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 800 to 2150 | |
| 850 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 320 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 36 |
| Density, g/cm3 | 7.7 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 6.0 |
| Embodied Energy, MJ/kg | 200 | |
| 84 |
| Embodied Water, L/kg | 100 | |
| 250 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 29 to 77 | |
| 30 |
| Strength to Weight: Bending, points | 25 to 48 | |
| 25 |
| Thermal Shock Resistance, points | 27 to 72 | |
| 21 |
Alloy Composition
| Carbon (C), % | 2.0 to 2.9 | |
| 0 to 0.015 |
| Chromium (Cr), % | 5.0 to 5.8 | |
| 31 to 35 |
| Copper (Cu), % | 0 to 0.25 | |
| 0.3 to 1.2 |
| Iron (Fe), % | 81.4 to 87.7 | |
| 25.7 to 37.9 |
| Manganese (Mn), % | 0 to 0.8 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0.9 to 1.4 | |
| 0.5 to 2.0 |
| Nickel (Ni), % | 0 to 0.3 | |
| 30 to 33 |
| Nitrogen (N), % | 0 | |
| 0.35 to 0.6 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.010 |
| Tungsten (W), % | 0.5 to 1.5 | |
| 0 |
| Vanadium (V), % | 3.9 to 5.2 | |
| 0 |