ThePipingMart Blog Grades Armox® 440T – Composition, Properties and Uses

Armox® 440T – Composition, Properties and Uses

Armox 440T

When it comes to armoured vehicles or other high-security applications, Armox 440T is a popular choice. This ultra-hard steel plate material is designed to provide maximum protection against various threats, including ballistic, explosive, and other forms of attack. If you’re looking for reliable armour plating for your vehicle or facility, Armox 440T might be your solution. In this blog post, we’ll cover everything you need to know about Armox 440T, from its composition and mechanical properties to its uses and corrosion resistance.

What is Armour 440T?

Armox 440T is a high-hardness armour steel utilized for applications requiring optimized ballistic properties. A complex heat treatment process creates a self-tempering martensitic microstructure with an ideal combination of strength and toughness, which provides superior ballistic protection against threats such as ammunition, explosives and fragmentations. This makes it the perfect choice when extreme levels of security are needed.

Armox 440T Composition

Armox 440T is made of high-hardness steel, which contains a blend of iron, carbon, and other elements, all combined to provide the ultimate protection against various threats. It also includes trace amounts of other metals, such as chromium and nickel, which help to enhance its strength and durability.

C *)
(MAX %)
SI *)
(MAX %)
(MAX %)
(MAX %)
(MAX %)
(MAX %)
(MAX %)
(MAX %)
(MAX %)
0.21 0.50 1.20 0.010 0.003 1.0 2.50 0.70 0.005

Armox 440T Mechanical Properties

Armox 440T boasts some of the best mechanical properties of any armoured steel. It has a high tensile strength of up to 2200 MPa, making it highly resistant to deformation when subjected to explosive impacts or high-velocity projectiles. It also has excellent toughness, meaning it can withstand considerable stress without cracking or breaking.

(MIN %)
(MIN %)
4.0 – 30.0 420 – 480 1100 1250 – 1550 10 12
30.1 – 50.0 420 – 480 1050 1250 – 1550 10 12
50.1 – 80.0 420 – 480 1000 1250 – 1550 10 12

Armox 440T Physical Properties:

In addition to its exceptional mechanical properties, Armox 440T has other excellent physical attributes that make it a reliable choice for many applications. It has a high density, meaning it’s highly resistant to penetration by sharp objects. It’s also highly resistant to abrasion, making it an excellent choice for vehicles facing rugged terrain, such as combat or police vehicles.

Armox 440T Thickness

4.0 – 12.9 – 0.0 / + 0.6
13.0 – 20.0 – 0.0 / + 0.8
20.0 – 40.0 – 0.0 / + 1.0
40.1 – 59.9 – 0.0 / + 1.4
60.0 – 80.0 – 0.0 / + 1.6

Armox 440T Uses

Armox 440T is ideal for various high-security applications, including armoured vehicles, military vehicles, police cars, and even buildings. It’s also commonly used to construct banks, government buildings, and other high-security facilities where protection against external threats is crucial.

Armox 440T Corrosion Resistance

Another critical advantage that Armox 440T has over other types of armoured steel is its corrosion resistance. Its high chromium content helps it resist rust and corrosion, which can cause conventional armour materials to degrade over time. This makes Armox 440T an ideal choice for applications exposed to harsh and corrosive environments.

Armox 440T Heat Treatment

Armox 440T can be heat treated to further enhance its physical and mechanical properties. Heat treatment involves heating the material to a specific temperature and holding it at that temperature for a set time before cooling it slowly to room temperature. This process can increase the hardness, ductility, toughness, and other properties of the material, making it even more resistant to various threats.

Armox 440T Machining

Finally, Armox 440T can be machined using standard metal cutting methods. This means it can be cut, drilled, and shaped to suit specific applications, making it a versatile choice for various high-security projects.

Armox 440t  Welding

ARMOR 440T is a highly weldable austenitic stainless steel with excellent toughness, strength, and corrosion resistance. It is typically used in automotive body parts, industrial equipment (pumps and valves), dairy tanks, medical applications and pressure vessels. Welding of this steel requires preheating to reduce the risk of cracking due to its high strength. Furthermore, special welding techniques such as SMAW or TIG should be employed for the best results.


In conclusion, Armox 440T is an excellent choice for many high-security applications. Its unique blend of physical and mechanical properties makes it highly resistant to various threats, including ballistic, explosive, and other forms of attack. If you’re looking for reliable armour plating for your vehicle or facility, Armox 440T is a top-of-the-line choice that will provide unparalleled protection for years.

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