Faster iron flow reduces the amount of subsurface dross stringers. With nearly the last iron in the pouring ladle, pour a nodularity check sample, but don't use the last dregs of iron. Finish pouring within 6 min. If a teapot pouring ladle is used, start by pouring off a 20 lb. Excessive FeSi can cause high Si content in the iron resulting in low toughness.
Insufficient inoculation can cause low nodule count and poor nodule shape.
D. Finish Pour any remaining iron in the pouring ladle into a pit mold. Don't leave any iron in the ladle. Empty out and scrape off the ladle lining. Place a cover on the ladle. It is now ready to pick up another heat of iron.