Here are five inoculants and five nodulizers that are commonly used in the steel and casting industry:

Inoculants:
1. Ferrosilicon: Ferrosilicon is a common inoculant that is added to molten iron to promote the formation of graphite nodules, which improves the ductility and strength of the cast iron.
2. Calcium-Silicon: Calcium-Silicon is used to improve the fluidity and nucleation in gray iron casting.
3. Barium-Silicon: Barium-Silicon inoculant is used to improve the castability and microstructure of iron castings.
4. Strontium: Strontium is used to refine the grain structure of steel castings, resulting in improved mechanical properties.
5. Zirconium: Zirconium is used as an inoculant to promote graphite formation in cast iron, and also improves the high-temperature properties of castings.

Nodulizers:
1. Ferrosilicon Magnesium: Ferrosilicon magnesium is commonly used as a nodulizer in ductile iron casting to promote the formation of spherical graphite nodules.
2. Ferro Silicon Barium: Ferro Silicon Barium is used as nodulizer to control the graphite structure in iron casting, increase strength and reduce gas porosity.
3. Ferro Silicon Calcium: Ferro Silicon Calcium is used in ductile iron casting to improve the nodularity of the graphite structure and mechanical properties.
4. Rare Earth Metals: Rare earth metals, such as Cerium and Lanthanum are used as nodulizers in iron casting to achieve a fine, spherical graphite structure with improved mechanical properties.
5. Inmold: Inmold nodularizer is used in ductile iron casting to prevent the formation of chill and promote the formation of spheroidal graphite.