Armox® 520T

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General Product Description

High hardness armor with extraordinary toughness properties.

Armox® 520T is the world’s toughest protection plate, having nominal 520 HBW hardness, for use in vehicles, buildings and many more applications.

Benefits of Armox® 520T include: 

  • Market-leading steel protection
  • Superior workshop properties
  • Optimized solutions
  • Perfect hardness/toughness balance, for combined penetration and blast protection
  • Expertise in ballistic protection from SSAB

It offers vehicle designers new ways to increase protection using lighter weight designs.

Armox® 520T is not intended for further heat treatment.

Mechanical Properties

Thickness
(mmin)
Thickness
(mmin)
4.0 - 12.00.157 - 0.472
Hardness
(HBW)
500 - 550
Yield strength Rp0.2
(min MPaksi)
1225178
Tensile strength Rm
(MPaksi)
1500 - 1850218 - 268
Elongation A5
(min %)
8
Thickness
(mmin)
Thickness
(mmin)
12.1 - 50.00.157 - 1.969
Hardness
(HBW)
500 - 550
Yield strength Rp0.2
(min MPaksi)
1200174
Tensile strength Rm
(MPaksi)
1500 - 1850218 - 268
Elongation A5
(min %)
8

Mechanical Testing

Brinell hardness test according to EN ISO 6506-1 on each heat treatment individual.

Charpy impact test according to EN ISO 148 on each heat and thickness from 6 mm.

Tensile test according to EN ISO 6892 on each heat.

Ultrasonic testing

According to EN ISO 10160 Class E3S3.

Impact Properties

Thickness
(mmin)
Thickness
(mmin)
4.0 - 50.00.157 - 1.969
Min impact energy for transversal testing,
Charpy V 10x10 mm test specimen 1)
27 J / -40 °C20 ft-lbs / -40 °F

1) Average of three tests. Transverse to rolling direction. Single value min. 70% of specified average. For plate thicknesses under 12 mm sub-size Charpy-V specimen are used. The specified minimum value is then propotional to the specimen cross-section.

Chemical Composition (ladle analysis)

C *)
(max %)
C *)
(max %)
0.32
Si *)
(max %)
0.40
Mn*)
(max %)
1.20
P
(max %)
0.010
S
(max %)
0.003
Cr*)
(max %)
1.0
Ni*)
(max %)
1.80
Mo*)
(max %)
0.70
B*)
(max %)
0.005

Tolerances

More details are given in SSAB brochure Armox® Guarantees or on www.ssab.com.

Thickness

Tolerances according to Armox® Thickness Guarantees.

Armox® Guarantees meet the requirements of EN 10029 Class C, but offers narrower tolerances.

Length and Width

Tolerances conform to EN 10029 or to SSAB´s standard after agreement.

Dimensional tolerances for plate with mill edge according to special agreement. 

Shape

Tolerances according to EN 10029.

Flatness

Tolerances according to Armox® flatness guarantees, which are more restrictive than EN 10029 Class N (steel type L).

Surface Properties

According to EN 10163-2 Class B, Subclass 3.

Delivery Conditions

The delivery condition is QT (Quenched and Tempered).

Delivery requirements can be found in SSAB’s brochure Armox® Guarantees or www.ssab.com.