Ferrous Metals

(a)   Carbon Steels contain 0.55% to 0.9% Carbon in Iron.

(a)   Hardening Steels harden to a greater depth when quenched from above the upper critical temperature.

(a)   Steels contain elements as well as Carbon deliberately added to Iron to achieve certain properties.

(a)   Cast Iron contains no free carbon.

(a)   Stainless Steels may be hardened by quenching from above the upper critical temperature.

(a)   Iron contains 2% or more Carbon in Iron.

1. Steels containing more than 0.55% Carbon in Iron may be hardened by (a)   treatment.

(a)   Cast Iron contains free carbon in the form of Graphite flakes.

(a)   Cast Iron is produced by annealing White Cast Iron.

(a)   Steels contain significant amounts of Chromium and/or Nickel with Carbon in Iron.