Annealed ASTM B780 Alloy vs. Annealed SAE-AISI M4
Annealed ASTM B780 alloy belongs to the otherwise unclassified metals classification, while annealed SAE-AISI M4 belongs to the iron alloys. There are 14 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is annealed ASTM B780 alloy and the bottom bar is annealed SAE-AISI M4.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 83 | |
| 200 |
| Poisson's Ratio | 0.36 | |
| 0.29 |
| Shear Modulus, GPa | 30 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 330 | |
| 770 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 260 |
| Melting Completion (Liquidus), °C | 860 | |
| 1610 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 440 |
| Thermal Expansion, µm/m-K | 18 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 10 | |
| 8.3 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.5 | |
| 13 |
| Stiffness to Weight: Bending, points | 14 | |
| 23 |
| Strength to Weight: Axial, points | 9.1 | |
| 26 |
| Strength to Weight: Bending, points | 11 | |
| 23 |
| Thermal Shock Resistance, points | 16 | |
| 24 |
Alloy Composition
| Cadmium (Cd), % | 0 to 0.050 | |
| 0 |
| Carbon (C), % | 0 | |
| 1.3 to 1.4 |
| Chromium (Cr), % | 0 | |
| 3.8 to 4.8 |
| Copper (Cu), % | 23.5 to 25.7 | |
| 0 to 0.25 |
| Iron (Fe), % | 0 to 0.050 | |
| 75.9 to 81.4 |
| Lead (Pb), % | 0 to 0.030 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0.15 to 0.4 |
| Molybdenum (Mo), % | 0 | |
| 4.3 to 5.5 |
| Nickel (Ni), % | 0.35 to 0.65 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 | |
| 0.2 to 0.45 |
| Silver (Ag), % | 74 to 76 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 | |
| 5.3 to 6.5 |
| Vanadium (V), % | 0 | |
| 3.8 to 4.5 |
| Zinc (Zn), % | 0 to 0.060 | |
| 0 |