ASTM A369 Grade FP91 vs. AWS E308LMo
Both ASTM A369 grade FP91 and AWS E308LMo are iron alloys. They have 76% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is ASTM A369 grade FP91 and the bottom bar is AWS E308LMo.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 19 | |
| 40 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 290 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1440 |
| Melting Onset (Solidus), °C | 1420 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 26 | |
| 16 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.9 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 10 | |
| 2.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 19 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 3.8 |
| Embodied Energy, MJ/kg | 37 | |
| 53 |
| Embodied Water, L/kg | 88 | |
| 160 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 28 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 24 | |
| 21 |
| Strength to Weight: Bending, points | 22 | |
| 20 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 4.2 |
| Thermal Shock Resistance, points | 18 | |
| 15 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.020 | |
| 0 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0 to 0.040 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 18 to 21 |
| Copper (Cu), % | 0 | |
| 0 to 0.75 |
| Iron (Fe), % | 87.3 to 90.3 | |
| 59.6 to 70.5 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0.5 to 2.5 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 2.0 to 3.0 |
| Nickel (Ni), % | 0 to 0.4 | |
| 9.0 to 12 |
| Niobium (Nb), % | 0.060 to 0.1 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.070 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.2 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 |
| Vanadium (V), % | 0.18 to 0.25 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.010 | |
| 0 |