Annealed SAE-AISI H21 vs. Annealed SAE-AISI S1
Both annealed SAE-AISI H21 and annealed SAE-AISI S1 are iron alloys. Both are furnished in the annealed condition. They have a very high 96% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is annealed SAE-AISI H21 and the bottom bar is annealed SAE-AISI S1.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Rockwell B Hardness | 97 | |
| 96 |
| Shear Modulus, GPa | 76 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 720 | |
| 690 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 260 |
| Melting Completion (Liquidus), °C | 1630 | |
| 1500 |
| Melting Onset (Solidus), °C | 1580 | |
| 1450 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Conductivity, W/m-K | 27 | |
| 41 |
| Thermal Expansion, µm/m-K | 11 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 23 | |
| 8.0 |
| Density, g/cm3 | 8.5 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 4.5 | |
| 2.6 |
| Embodied Energy, MJ/kg | 68 | |
| 37 |
| Embodied Water, L/kg | 72 | |
| 56 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 5.9 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 23 | |
| 24 |
| Strength to Weight: Bending, points | 21 | |
| 22 |
| Thermal Diffusivity, mm2/s | 7.1 | |
| 11 |
| Thermal Shock Resistance, points | 24 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0.28 to 0.36 | |
| 0.4 to 0.55 |
| Chromium (Cr), % | 3.0 to 3.8 | |
| 1.0 to 1.8 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 to 0.25 |
| Iron (Fe), % | 87.6 to 93.8 | |
| 91.6 to 96.7 |
| Manganese (Mn), % | 0.15 to 0.4 | |
| 0.1 to 0.4 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.030 |
| Silicon (Si), % | 0.15 to 0.5 | |
| 0.15 to 1.2 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tungsten (W), % | 8.5 to 10 | |
| 1.5 to 3.0 |
| Vanadium (V), % | 0.3 to 0.6 | |
| 0.15 to 0.3 |