ASTM A369 Grade FP91 vs. Grade 300 Maraging Steel
Both ASTM A369 grade FP91 and grade 300 maraging steel are iron alloys. They have 68% of their average alloy composition in common. There are 24 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 ASTM A369 grade FP91 and the bottom bar is grade 300 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 19 | |
| 6.5 to 18 |
| Poisson's Ratio | 0.28 | |
| 0.3 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 410 | |
| 640 to 1190 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 1030 to 2030 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 760 to 1990 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 270 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1480 |
| Melting Onset (Solidus), °C | 1420 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 34 |
| Density, g/cm3 | 7.8 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 5.1 |
| Embodied Energy, MJ/kg | 37 | |
| 68 |
| Embodied Water, L/kg | 88 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
| 130 to 170 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 24 | |
| 35 to 68 |
| Strength to Weight: Bending, points | 22 | |
| 28 to 43 |
| Thermal Shock Resistance, points | 18 | |
| 31 to 62 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.020 | |
| 0.050 to 0.15 |
| Boron (B), % | 0 | |
| 0 to 0.0030 |
| Calcium (Ca), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0 to 0.030 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 0 |
| Cobalt (Co), % | 0 | |
| 8.5 to 9.5 |
| Iron (Fe), % | 87.3 to 90.3 | |
| 65 to 68.4 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 0 to 0.4 | |
| 18 to 19 |
| Niobium (Nb), % | 0.060 to 0.1 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.070 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.010 |
| Silicon (Si), % | 0.2 to 0.5 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0.5 to 0.8 |
| Vanadium (V), % | 0.18 to 0.25 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.010 | |
| 0 to 0.020 |