ASTM A387 Grade 12 Steel vs. ASTM B817 Type II
ASTM A387 grade 12 steel belongs to the iron alloys classification, while ASTM B817 type II belongs to the titanium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 12 steel and the bottom bar is ASTM B817 type II.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 100 |
| Elongation at Break, % | 25 | |
| 3.0 to 13 |
| Fatigue Strength, MPa | 190 to 230 | |
| 390 to 530 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 73 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 470 to 520 | |
| 900 to 960 |
| Tensile Strength: Yield (Proof), MPa | 260 to 310 | |
| 780 to 900 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 400 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 350 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1580 |
| Melting Onset (Solidus), °C | 1420 | |
| 1530 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 550 |
| Thermal Expansion, µm/m-K | 13 | |
| 9.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.8 | |
| 37 |
| Density, g/cm3 | 7.8 | |
| 4.6 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 40 |
| Embodied Energy, MJ/kg | 21 | |
| 650 |
| Embodied Water, L/kg | 51 | |
| 220 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 98 to 110 | |
| 26 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 to 250 | |
| 2890 to 3890 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 34 |
| Strength to Weight: Axial, points | 16 to 18 | |
| 55 to 58 |
| Strength to Weight: Bending, points | 17 to 18 | |
| 45 to 47 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 62 to 66 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 5.0 to 6.0 |
| Carbon (C), % | 0.050 to 0.17 | |
| 0 to 0.1 |
| Chlorine (Cl), % | 0 | |
| 0 to 0.2 |
| Chromium (Cr), % | 0.8 to 1.2 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0.35 to 1.0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 97 to 98.2 | |
| 0.35 to 1.0 |
| Manganese (Mn), % | 0.4 to 0.65 | |
| 0 |
| Molybdenum (Mo), % | 0.45 to 0.6 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.040 |
| Oxygen (O), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.4 | |
| 0 to 0.1 |
| Sodium (Na), % | 0 | |
| 0 to 0.2 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 0 | |
| 82.1 to 87.8 |
| Vanadium (V), % | 0 | |
| 5.0 to 6.0 |
| Residuals, % | 0 | |
| 0 to 0.4 |