ASTM A27 Cast Steel vs. ASTM B817 Type I
ASTM A27 cast steel belongs to the iron alloys classification, while ASTM B817 type I belongs to the titanium alloys.
For each property being compared, the top bar is ASTM A27 cast steel and the bottom bar is ASTM B817 type I.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 100 |
| Elongation at Break, % | 25 to 27 | |
| 4.0 to 13 |
| Fatigue Strength, MPa | 170 to 230 | |
| 360 to 520 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Reduction in Area, % | 34 to 40 | |
| 5.0 to 29 |
| Shear Modulus, GPa | 73 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 550 | |
| 770 to 960 |
| Tensile Strength: Yield (Proof), MPa | 230 to 310 | |
| 700 to 860 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 340 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1600 |
| Melting Onset (Solidus), °C | 1420 | |
| 1550 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 560 |
| Thermal Conductivity, W/m-K | 52 | |
| 7.1 |
| Thermal Expansion, µm/m-K | 12 | |
| 9.6 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 to 7.1 | |
| 1.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 2.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 36 |
| Density, g/cm3 | 7.8 | |
| 4.4 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 38 |
| Embodied Energy, MJ/kg | 18 | |
| 610 |
| Embodied Water, L/kg | 45 to 46 | |
| 200 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 96 to 120 | |
| 30 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 260 | |
| 2310 to 3540 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 35 |
| Strength to Weight: Axial, points | 16 to 20 | |
| 48 to 60 |
| Strength to Weight: Bending, points | 17 to 19 | |
| 42 to 49 |
| Thermal Diffusivity, mm2/s | 14 | |
| 2.9 |
| Thermal Shock Resistance, points | 15 to 18 | |
| 54 to 68 |