ASTM A369 Grade FP91 vs. AWS E209
Both ASTM A369 grade FP91 and AWS E209 are iron alloys. They have 69% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 E209.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 19 | |
| 17 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 770 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 300 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1420 |
| Melting Onset (Solidus), °C | 1420 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 21 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 4.4 |
| Embodied Energy, MJ/kg | 37 | |
| 63 |
| Embodied Water, L/kg | 88 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 33 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 24 | |
| 28 |
| Strength to Weight: Bending, points | 22 | |
| 24 |
| Thermal Shock Resistance, points | 18 | |
| 19 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.020 | |
| 0 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0 to 0.060 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 20.5 to 24 |
| Copper (Cu), % | 0 | |
| 0 to 0.75 |
| Iron (Fe), % | 87.3 to 90.3 | |
| 51.5 to 64.3 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 4.0 to 7.0 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 1.5 to 3.0 |
| Nickel (Ni), % | 0 to 0.4 | |
| 9.5 to 12 |
| Niobium (Nb), % | 0.060 to 0.1 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.070 | |
| 0.1 to 0.3 |
| 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 | |
| 0.1 to 0.3 |
| Zirconium (Zr), % | 0 to 0.010 | |
| 0 |