ASTM B780 Alloy vs. ASTM B817 Type II
ASTM B780 alloy belongs to the otherwise unclassified metals classification, while ASTM B817 type II belongs to the titanium alloys. There are 14 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is ASTM B780 alloy and the bottom bar is ASTM B817 type II.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 83 | |
| 100 |
| Elongation at Break, % | 1.1 to 9.1 | |
| 3.0 to 13 |
| Poisson's Ratio | 0.36 | |
| 0.32 |
| Shear Modulus, GPa | 30 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 330 to 590 | |
| 900 to 960 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 400 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 550 |
| Thermal Expansion, µm/m-K | 18 | |
| 9.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 10 | |
| 4.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.5 | |
| 13 |
| Stiffness to Weight: Bending, points | 14 | |
| 34 |
| Strength to Weight: Axial, points | 9.1 to 16 | |
| 55 to 58 |
| Strength to Weight: Bending, points | 11 to 15 | |
| 45 to 47 |
| Thermal Shock Resistance, points | 16 to 29 | |
| 62 to 66 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 5.0 to 6.0 |
| Cadmium (Cd), % | 0 to 0.050 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.1 |
| Chlorine (Cl), % | 0 | |
| 0 to 0.2 |
| Copper (Cu), % | 23.5 to 25.7 | |
| 0.35 to 1.0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.050 | |
| 0.35 to 1.0 |
| Lead (Pb), % | 0 to 0.030 | |
| 0 |
| Nickel (Ni), % | 0.35 to 0.65 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.040 |
| Oxygen (O), % | 0 | |
| 0 to 0.3 |
| Silicon (Si), % | 0 | |
| 0 to 0.1 |
| Silver (Ag), % | 74 to 76 | |
| 0 |
| Sodium (Na), % | 0 | |
| 0 to 0.2 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 0 | |
| 82.1 to 87.8 |
| Vanadium (V), % | 0 | |
| 5.0 to 6.0 |
| Zinc (Zn), % | 0 to 0.060 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.4 |