In general, most iron or ferrous armour is hardened either through work hardening (done by hammering ) or by heating it to its critical temperature (dependent upon the technique used) and then quenched in water, urine, oil or other more secret substances.
(most iron or ferrous armour; is hardened; ) (work hardening; done; by hammering) (the technique; used; ) (most iron or ferrous armour; quenched; in water, urine, oil or other more secret substances; T:then)
most iron or ferrous armour work hardening the technique most iron or ferrous armour
is hardened done used quenched
by hammering
in water, urine, oil or other more secret substances T:then