ASTM B817 Type II vs. ASTM A302 Alloy Steel
ASTM B817 type II belongs to the titanium alloys classification, while ASTM A302 alloy steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 A302 alloy steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 190 |
| Elongation at Break, % | 3.0 to 13 | |
| 20 to 23 |
| Fatigue Strength, MPa | 390 to 530 | |
| 250 to 280 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 40 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 960 | |
| 590 to 620 |
| Tensile Strength: Yield (Proof), MPa | 780 to 900 | |
| 350 to 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 350 | |
| 410 |
| 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 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 37 | |
| 2.4 to 3.0 |
| Density, g/cm3 | 4.6 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 40 | |
| 1.5 to 1.6 |
| Embodied Energy, MJ/kg | 650 | |
| 20 to 21 |
| Embodied Water, L/kg | 220 | |
| 48 to 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 26 to 120 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2890 to 3890 | |
| 330 to 410 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 34 | |
| 24 |
| Strength to Weight: Axial, points | 55 to 58 | |
| 21 to 22 |
| Strength to Weight: Bending, points | 45 to 47 | |
| 20 to 21 |
| Thermal Shock Resistance, points | 62 to 66 | |
| 17 to 18 |