K12 has a Ni-Mo-Cr alloy steel composition and possesses an appropriate combination of hardness and toughness mandatory for proper ballistics performance. K12 plate is normally supplied in the annealed condition so that it may be more easily cut and formed into the desired configuration. It may also be supplied as heat treated parts cut to the final configuration. This datasheet provides information on physical properties, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on corrosion resistance as well as forming and joining. Filing Code: SA-560. Producer or source: Allegheny Ludlum.