ASTM B817 Type II vs. ASTM A27 Cast Steel
ASTM B817 type II belongs to the titanium alloys classification, while ASTM A27 cast steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is ASTM B817 type II and the bottom bar is ASTM A27 cast steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 190 |
| Elongation at Break, % | 3.0 to 13 | |
| 25 to 27 |
| Fatigue Strength, MPa | 390 to 530 | |
| 170 to 230 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Reduction in Area, % | 4.0 to 13 | |
| 34 to 40 |
| Shear Modulus, GPa | 40 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 960 | |
| 460 to 550 |
| Tensile Strength: Yield (Proof), MPa | 780 to 900 | |
| 230 to 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 350 | |
| 400 |
| Melting Completion (Liquidus), °C | 1580 | |
| 1460 |
| Melting Onset (Solidus), °C | 1530 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 470 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 37 | |
| 1.8 |
| Density, g/cm3 | 4.6 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 40 | |
| 1.4 |
| Embodied Energy, MJ/kg | 650 | |
| 18 |
| Embodied Water, L/kg | 220 | |
| 45 to 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 26 to 120 | |
| 96 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2890 to 3890 | |
| 140 to 260 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 34 | |
| 24 |
| Strength to Weight: Axial, points | 55 to 58 | |
| 16 to 20 |
| Strength to Weight: Bending, points | 45 to 47 | |
| 17 to 19 |
| Thermal Shock Resistance, points | 62 to 66 | |
| 15 to 18 |