Armour steels are low-carbon alloy steels with a high-quality, homogeneous microstructure that are widely used in armoured combat vehicles. They are designed to resist cracking, fragmentation, and breaking under multiple impacts from various types of projectiles, such as kinetic penetrators and high-explosive fragmentation warheads.
These steels undergo hardening and tempering processes during production, resulting in a highly tempered, precipitation-hardened martensitic microstructure. The goal in producing these steels through rolling is to achieve high strength and toughness after hardening and tempering in sheet form.
Armour steels are mainly classified into two categories:
– **Rolled Homogeneous Armour (RHA)**
– **High Hardness Armour (HHA)**
One of the key requirements for these materials is uniform hardness throughout the thickness of the plate.
