ASTM B780 Alloy vs. Automotive Malleable Cast Iron
ASTM B780 alloy belongs to the otherwise unclassified metals classification, while automotive malleable cast iron belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is ASTM B780 alloy and the bottom bar is automotive malleable cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 83 | |
| 180 |
| Elongation at Break, % | 1.1 to 9.1 | |
| 1.0 to 10 |
| Poisson's Ratio | 0.36 | |
| 0.29 |
| Shear Modulus, GPa | 30 | |
| 70 |
| Tensile Strength: Ultimate (UTS), MPa | 330 to 590 | |
| 350 to 720 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 260 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 480 |
| Thermal Expansion, µm/m-K | 18 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 70 to 76 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 62 to 68 | |
| 8.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 10 | |
| 7.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.5 | |
| 13 |
| Stiffness to Weight: Bending, points | 14 | |
| 25 |
| Strength to Weight: Axial, points | 9.1 to 16 | |
| 13 to 26 |
| Strength to Weight: Bending, points | 11 to 15 | |
| 14 to 24 |
| Thermal Shock Resistance, points | 16 to 29 | |
| 9.9 to 21 |
Alloy Composition
| Cadmium (Cd), % | 0 to 0.050 | |
| 0 |
| Carbon (C), % | 0 | |
| 2.2 to 2.9 |
| Copper (Cu), % | 23.5 to 25.7 | |
| 0 |
| Iron (Fe), % | 0 to 0.050 | |
| 93.6 to 96.7 |
| Lead (Pb), % | 0 to 0.030 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0.15 to 1.3 |
| Nickel (Ni), % | 0.35 to 0.65 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0.020 to 0.15 |
| Silicon (Si), % | 0 | |
| 0.9 to 1.9 |
| Silver (Ag), % | 74 to 76 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0.020 to 0.2 |
| Zinc (Zn), % | 0 to 0.060 | |
| 0 |