We are successfully reducing our customers’ costs by converting steel castings, forgings, stampings and fabrications to ductile iron castings. In order to provide higher strengths, we supply all grades of Austempered Ductile Iron (ADI). The consistent chemistry of our iron provides an ideal response to austempering, which gives us an advantage when ADI is required.
Casting is also a more efficient, more cost-effective process than other metal-forming methods. Ductile Iron castings result in products that not only perform better, but also save money. Compared to using a forging, stamping or fabrication, using a casting may make more sense.
Ductile iron is a family of versatile cast irons that contain as-cast spheroidal graphite nodules. It is these graphite nodules that give ductile iron the strength and ductility that has made it commercially popular today.
By controlling the matrix microstructure, ductile iron is available in several grades ranging from ductility exceeding 18% elongation to strength in excess of 100 ksi. Austempered Ductile Iron (ADI) offers even higher strengths and wear properties than the standard grades of ductile iron by means of a specialized heat treat process.
Ductile iron offers cost advantages over steel fabrications and forgings. Flexibility of design, the ability to reduce a multi-component fabricated assembly to a single casting offers several obvious opportunities to save cost. Designing complex castings that are closer to near net shape results in lower overall costs when compared to forgings.
|Prior Designation||Grade||Tensile Strength MPa/KSI||Yield Strength MPa/KSI||Elongation %||Impact Energy Joules/Lb-Ft||Typical Hardness BHN|
|-||750-500-11||750 / 110||500 / 70||11||110 / 80||241-302|
|1||900-650-09||900 / 130||650 / 90||9||100 / 75||269-341|
|2||1050-750-07||1050 / 150||750 / 110||7||80 / 60||302-375|
|3||1200-850-04||1200 / 175||850 / 125||4||60 / 45||341-444|
|4||1400-1100-02||1400 / 200||1100 / 155||2||35 / 25||388-477|
|5||1600-1300-01||1600 / 230||1300 / 185||1||20 / 15||402-512|
|Grade||Typical BHN||Tensile Strength (min)||Yield Strength (min)||% Elongation (min)|