Commercially Pure Silver vs. ASTM A387 Grade 91 Class 2
Commercially pure silver belongs to the otherwise unclassified metals classification, while ASTM A387 grade 91 class 2 belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is commercially pure silver and the bottom bar is ASTM A387 grade 91 class 2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 190 |
| Elongation at Break, % | 1.1 to 29 | |
| 20 |
| Poisson's Ratio | 0.37 | |
| 0.28 |
| Shear Modulus, GPa | 26 | |
| 75 |
| Shear Strength, MPa | 120 to 190 | |
| 420 |
| Tensile Strength: Ultimate (UTS), MPa | 190 to 340 | |
| 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 110 | |
| 270 |
| Melting Completion (Liquidus), °C | 960 | |
| 1460 |
| Melting Onset (Solidus), °C | 960 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 240 | |
| 470 |
| Thermal Conductivity, W/m-K | 420 | |
| 26 |
| Thermal Expansion, µm/m-K | 20 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 100 | |
| 8.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 87 | |
| 10 |
Otherwise Unclassified Properties
| Density, g/cm3 | 10 | |
| 7.8 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.8 | |
| 14 |
| Stiffness to Weight: Bending, points | 13 | |
| 25 |
| Strength to Weight: Axial, points | 4.9 to 8.9 | |
| 24 |
| Strength to Weight: Bending, points | 6.9 to 10 | |
| 22 |
| Thermal Diffusivity, mm2/s | 170 | |
| 6.9 |
| Thermal Shock Resistance, points | 9.5 to 17 | |
| 19 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0 | |
| 0.080 to 0.12 |
| Chromium (Cr), % | 0 | |
| 8.0 to 9.5 |
| Iron (Fe), % | 0 | |
| 87.3 to 90.3 |
| Manganese (Mn), % | 0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.85 to 1.1 |
| Nickel (Ni), % | 0 | |
| 0 to 0.4 |
| Niobium (Nb), % | 0 | |
| 0.060 to 0.1 |
| Nitrogen (N), % | 0 | |
| 0.030 to 0.070 |
| Phosphorus (P), % | 0 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 | |
| 0.2 to 0.5 |
| Silver (Ag), % | 99.9 to 100 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 0.010 |
| Vanadium (V), % | 0 | |
| 0.18 to 0.25 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.010 |
| Residuals, % | 0 to 0.1 | |
| 0 |