Ductile Cast Iron vs. ASTM B628 Ag-Cu
Ductile cast iron belongs to the iron alloys classification, while ASTM B628 Ag-Cu belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is ductile cast iron and the bottom bar is ASTM B628 Ag-Cu.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 170 to 180 | |
| 83 |
| Elongation at Break, % | 2.1 to 20 | |
| 1.1 to 17 |
| Poisson's Ratio | 0.28 to 0.31 | |
| 0.36 |
| Shear Modulus, GPa | 64 to 70 | |
| 31 |
| Shear Strength, MPa | 420 to 800 | |
| 210 to 430 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 920 | |
| 350 to 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 140 |
| Melting Completion (Liquidus), °C | 1160 | |
| 780 |
| Melting Onset (Solidus), °C | 1120 | |
| 780 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 280 |
| Thermal Expansion, µm/m-K | 11 | |
| 19 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 84 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 to 9.4 | |
| 75 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.1 to 7.5 | |
| 10 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 to 14 | |
| 4.6 |
| Stiffness to Weight: Bending, points | 24 to 26 | |
| 14 |
| Strength to Weight: Axial, points | 17 to 35 | |
| 9.5 to 21 |
| Strength to Weight: Bending, points | 18 to 29 | |
| 11 to 18 |
| Thermal Shock Resistance, points | 17 to 35 | |
| 16 to 34 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 3.0 to 3.5 | |
| 0 |
| Copper (Cu), % | 0 | |
| 26.6 to 29 |
| Iron (Fe), % | 93.7 to 95.5 | |
| 0 to 0.050 |
| Lead (Pb), % | 0 | |
| 0 to 0.030 |
| Nickel (Ni), % | 0 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.080 | |
| 0 to 0.030 |
| Silicon (Si), % | 1.5 to 2.8 | |
| 0 |
| Silver (Ag), % | 0 | |
| 71 to 73 |
| Zinc (Zn), % | 0 | |
| 0 to 0.060 |
| Residuals, % | 0 | |
| 0 to 0.21 |