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Steel armor sheets
General product description
Outstanding strength – a new generation of armor steel grades
Many years of experience in the production of special steels for various Polish defense industry plants, combined with the developments and research carried out by the HSJ steelworks in recent years in cooperation with military-technological institutes, have led to the development and production of unique grades of ARMSTAL armor steel, which have outstanding strength and hardness, confirmed by ballistic research and tests. Despite their relatively small thickness, they protect vehicles and personnel from shells and explosions. This allows ARMSTAL armor steel to solve the problems of weight saving in vehicle armor for various levels of ballistic protection.
Applications of armor steel – examples
- Armoring of the side walls, floor and roof of armored vehicles
- Underbody armor placed under the vehicle’s crew cab
- Ballistic shields
- Embassy buildings, banks, shelters
- Cargo and passenger compartments
- Gun ranges, special containers
- Bullet traps, protective doors
We cover the full production cycle, from melting through rolling and heat treatment to cutting finished components from armour plates according to customer specifications. Our in-depth knowledge of steel production and processing processes allows us to design and manufacture steel with chemical composition, mechanical and strength properties adapted to its end use. The constant chemical composition of the steel grade ensures the appropriate material properties. The rolled plates undergo a quenching and low-temperature tempering process. The quenching is carried out in a quenching press, which ensures uniform hardness across the entire cross-section of the plate and maintains good flatness. The heat-treated plates have a tempered martensitic structure. Each batch of armour plates is tested for mechanical properties in our laboratory.
Armstal armor steel grades
Armored sheets, their main advantage, are characterized by high strength and at the same time high ductility. Their high hardness allows them to be used in cases requiring high resistance to abrasion. Due to the high hardenability, the structure and hardness are uniform throughout the thickness of the sheet. They can be used for components operating in a wide range of temperatures, even down to -40°C. Thanks to these properties, sheets made of this material are characterized by high ballistic resistance.
| Trade name | Brinell hardness (HB) | Delivery status | Application example |
|---|---|---|---|
| ARMSTAL 450 | 420-480 | Q+T Mn Ni max 0.24 C |
Explosion protection of the floor of the transport vehicles |
| ARMSTAL 500 | 480-540 | Q+T Mn Cr Ni max 0.32 C |
Light and medium armored vehicle structures, body armor, special vehicles, armored doors |
| ARMSTAL 550 | 540-600 | Q+T Mn Ni max 0.40 C |
Body armor, steel hull components for all types of vehicles.
Used as a frontal layer in ballistic shields |
| ARMSTAL 600 | >600 | Q+T Mn Cr Ni max 0.45 C |
| Thickness and thickness tolerances | ||||
|---|---|---|---|---|
| Thickness [mm] | Thickness tolerance | Width [mm] | Length [mm] | Flatness deviation |
| 3 – 6 | +0.8 / -0.0 | 800 – 1500 | 2000 – 2500 | wg EN 10029 class N, steel H |
| 7 – 12 | +1.0 / -0.0 | 1000 – 1500 | 2000 – 6000 | |
| 13 – 20 | +1.50 / -0.0 | 1000 – 2000 | 2000 – 6000 | |
| 21 – 30 1) | +1.75 / -0.0 | 1000 – 2000 | 2000 – 5000 | |
1) To be agreed upon when ordering, ARMSTAL 600 gr. max. 10 mm
The production process uses a patented sheet hardening technology. First, the sheets are hardened and annealed, which involves heating them in a furnace to the austenite temperature, and then evenly cooling in a quenching device. This ensures uniform hardness across the entire cross-section of the sheet, impact toughness and high ballistic resistance. Customers can choose the type of armor plate, which, in combination with high hardness and reduced thickness, allows for innovative solutions that meet the criteria for ballistic resistance for armored vehicles, ballistic shields, multi-layer armor, gun turrets and mobile containers.