Hardened SAE-AISI H11 vs. Hardened SAE-AISI M50
Both hardened SAE-AISI H11 and hardened SAE-AISI M50 are iron alloys. Both are furnished in the hardened (H) condition. They have a very high 96% of their average alloy composition in common.
For each property being compared, the top bar is hardened SAE-AISI H11 and the bottom bar is hardened SAE-AISI M50.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Rockwell C Hardness | 57 | |
| 70 |
| Shear Modulus, GPa | 74 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 1840 | |
| 2250 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 260 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1480 |
| Melting Onset (Solidus), °C | 1410 | |
| 1440 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 42 | |
| 35 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.2 | |
| 8.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.5 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 5.5 | |
| 9.0 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 5.1 |
| Embodied Energy, MJ/kg | 43 | |
| 74 |
| Embodied Water, L/kg | 75 | |
| 83 |
Common Calculations
| PREN (Pitting Resistance) | 9.6 | |
| 19 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 66 | |
| 80 |
| Strength to Weight: Bending, points | 43 | |
| 49 |
| Thermal Diffusivity, mm2/s | 11 | |
| 9.7 |
| Thermal Shock Resistance, points | 58 | |
| 66 |
Alloy Composition
| Carbon (C), % | 0.33 to 0.43 | |
| 0.78 to 0.88 |
| Chromium (Cr), % | 4.8 to 5.5 | |
| 3.8 to 4.5 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 to 0.25 |
| Iron (Fe), % | 89.6 to 92.5 | |
| 87 to 90.4 |
| Manganese (Mn), % | 0.2 to 0.5 | |
| 0.15 to 0.45 |
| Molybdenum (Mo), % | 1.1 to 1.6 | |
| 3.9 to 4.8 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.030 |
| Silicon (Si), % | 0.8 to 1.2 | |
| 0.2 to 0.6 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Vanadium (V), % | 0.3 to 0.6 | |
| 0.8 to 1.3 |