Please find below a recap chart of steels and stainless steels used in satellites and ballcones manufacturing.
Satellite dimensions are some millimeters for the balls and 2 or 3 mm to add for the Saturn (Ex : 3×5 mm, 5×7 mm or 7×10 mm). They are sold by weight, like the polishing balls.
Ballcones are less flattened and standard dimension is 5×5 mm.
Tolerances are wider and not standardized.