SAE-AISI H25 Steel vs. R30556 Alloy
Both SAE-AISI H25 steel and R30556 alloy are iron alloys. They have a modest 37% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 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 SAE-AISI H25 steel and the bottom bar is R30556 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 210 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 79 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 710 to 1620 | |
| 780 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 300 |
| Melting Completion (Liquidus), °C | 1750 | |
| 1420 |
| Melting Onset (Solidus), °C | 1700 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 450 |
| Thermal Conductivity, W/m-K | 26 | |
| 11 |
| Thermal Expansion, µm/m-K | 12 | |
| 15 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 38 | |
| 70 |
| Density, g/cm3 | 9.1 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 6.2 | |
| 8.7 |
| Embodied Energy, MJ/kg | 93 | |
| 130 |
| Embodied Water, L/kg | 83 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 29 | |
| 40 |
| Stiffness to Weight: Axial, points | 12 | |
| 14 |
| Stiffness to Weight: Bending, points | 22 | |
| 23 |
| Strength to Weight: Axial, points | 22 to 50 | |
| 26 |
| Strength to Weight: Bending, points | 20 to 34 | |
| 22 |
| Thermal Diffusivity, mm2/s | 6.7 | |
| 2.9 |
| Thermal Shock Resistance, points | 22 to 49 | |
| 18 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.1 to 0.5 |
| Boron (B), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0.22 to 0.32 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 3.8 to 4.5 | |
| 21 to 23 |
| Cobalt (Co), % | 0 | |
| 16 to 21 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 77.2 to 81.3 | |
| 20.4 to 38.2 |
| Lanthanum (La), % | 0 | |
| 0.0050 to 0.1 |
| Manganese (Mn), % | 0.15 to 0.4 | |
| 0.5 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 2.5 to 4.0 |
| Nickel (Ni), % | 0 to 0.3 | |
| 19 to 22.5 |
| Niobium (Nb), % | 0 | |
| 0 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0.1 to 0.3 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.4 | |
| 0.2 to 0.8 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 0 | |
| 0.3 to 1.3 |
| Tungsten (W), % | 14 to 16 | |
| 2.0 to 3.5 |
| Vanadium (V), % | 0.4 to 0.6 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0.0010 to 0.1 |