65-45-12X is an all-purpose grade of ductile iron available in larger sizes of rounds and rectangles/squares. With medium strength and ductility, 65-45-12X can be a suitable alternative to low and medium carbon steels. A predominantly ferritic matrix allows for it to be machined as opposed to steels and pearlitic irons, and it is appropriate for applications necessitating fatigue strength and ductility. Download the 65-45-12X Ductile Iron Product Brief, or X Products for all X grades.
Gears
Cylinder Blocks, End Caps, Gear Rack Housings, Gerotors, Glands, Manifolds, Pistons, Rotors, Valves
Bank Molds, Plungers
Bushings, Chuck Bodies, Die Blocks, Flywheels, Gears, Housings, Journals, Pulleys, Rams, Rotary Tables, Side Frames, Spindle Housings, Tie Rod Nuts
Plunger Pin
Coupling Hubs, Gears, Pulleys, Sprockets
Gears, Housings, Pistons, Rotary Screws, Rotors
Coupling Hubs, Gears, Pulleys, Rail Spacers, Sprockets
The microstructure consists of Types I & II nodular graphite as defined in ASTM A247. The matrix is ferrite with approximately 5–25% pearlite. The edge or rim will have a higher nodular count and will be mostly ferrite. Chill carbides will be less than 5% in any field at 100x and will be well dispersed.
Magnesium is added as an inoculant to produce nodular graphite.
| Element | Percentage |
|---|---|
| Carbon | 3.20–3.85% |
| Silicon | 2.20–3.10% |
| Manganese | 0.10–0.55% |
| Sulfur | 0.02% Max |
| Phosphorus | 0.08% Max |
Hardness properties for various diameters are shown in the table. Hardness properties listed are minimum and maximum across the bar. For rectangles, squares and shapes, the hardness properties will depend on minimum and maximum section thickness and will be supplied on request.
Size Ranges
| Inches | Millimeter |
|---|---|
| 1.000-28.000 | 25-711 |
BHN
| Inches | Millimeter |
|---|---|
| 131 | 217 |
Tensile strength is determined from a longitudinal test specimen taken from mid-radius of the as-cast bar.
| Mechanical Properties | |
|---|---|
| Tensile strength psi (min) | 65,000 |
| Yield strength psi (min) | 45,000 |
| Elongation (min) | 12% |
