ASTM A387 Grade 9 Class 1 vs. Annealed SAE-AISI H23
Both ASTM A387 grade 9 class 1 and annealed SAE-AISI H23 are iron alloys. Both are furnished in the annealed condition. They have 84% of their average alloy composition in common. There are 23 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 ASTM A387 grade 9 class 1 and the bottom bar is annealed SAE-AISI H23.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 | |
| 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 80 |
| Tensile Strength: Ultimate (UTS), MPa | 500 | |
| 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 260 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1680 |
| Melting Onset (Solidus), °C | 1410 | |
| 1630 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 440 |
| Thermal Conductivity, W/m-K | 26 | |
| 20 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 6.5 | |
| 34 |
| Density, g/cm3 | 7.8 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 2.1 | |
| 6.9 |
| Embodied Energy, MJ/kg | 28 | |
| 110 |
| Embodied Water, L/kg | 87 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 12 | |
| 32 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 22 |
| Strength to Weight: Axial, points | 18 | |
| 24 |
| Strength to Weight: Bending, points | 18 | |
| 21 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 5.2 |
| Thermal Shock Resistance, points | 14 | |
| 23 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0.25 to 0.35 |
| Chromium (Cr), % | 8.0 to 10 | |
| 11 to 12.8 |
| Copper (Cu), % | 0 | |
| 0 to 0.25 |
| Iron (Fe), % | 87.1 to 90.8 | |
| 71.3 to 76.7 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0.15 to 0.4 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.6 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 | |
| 11 to 12.8 |
| Vanadium (V), % | 0 to 0.040 | |
| 0.75 to 1.3 |