ASTM B817 Type I vs. Grade 250 Maraging Steel
ASTM B817 type I belongs to the titanium alloys classification, while grade 250 maraging steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is ASTM B817 type I and the bottom bar is grade 250 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 190 |
| Elongation at Break, % | 4.0 to 13 | |
| 7.3 to 17 |
| Poisson's Ratio | 0.32 | |
| 0.3 |
| Shear Modulus, GPa | 40 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 770 to 960 | |
| 970 to 1800 |
| Tensile Strength: Yield (Proof), MPa | 700 to 860 | |
| 660 to 1740 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 270 |
| Melting Completion (Liquidus), °C | 1600 | |
| 1480 |
| Melting Onset (Solidus), °C | 1550 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 560 | |
| 450 |
| Thermal Expansion, µm/m-K | 9.6 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 36 | |
| 32 |
| Density, g/cm3 | 4.4 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 38 | |
| 4.9 |
| Embodied Energy, MJ/kg | 610 | |
| 65 |
| Embodied Water, L/kg | 200 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 30 to 120 | |
| 130 to 150 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 23 |
| Strength to Weight: Axial, points | 48 to 60 | |
| 33 to 61 |
| Strength to Weight: Bending, points | 42 to 49 | |
| 26 to 40 |
| Thermal Shock Resistance, points | 54 to 68 | |
| 29 to 54 |
Alloy Composition
| Aluminum (Al), % | 5.5 to 6.8 | |
| 0.050 to 0.15 |
| Boron (B), % | 0 | |
| 0 to 0.0030 |
| Calcium (Ca), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.030 |
| Chlorine (Cl), % | 0 to 0.2 | |
| 0 |
| Cobalt (Co), % | 0 | |
| 7.0 to 8.5 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 66.3 to 71.1 |
| Manganese (Mn), % | 0 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 0 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 0 | |
| 17 to 19 |
| Nitrogen (N), % | 0 to 0.040 | |
| 0 |
| Oxygen (O), % | 0 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 0.1 |
| Sodium (Na), % | 0 to 0.2 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Titanium (Ti), % | 87 to 91 | |
| 0.3 to 0.5 |
| Vanadium (V), % | 3.5 to 4.5 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |
| Residuals, % | 0 to 0.4 | |
| 0 |