We are modernizing it so we can produce more plate. We are the only plate manufacturer in Canada. It is a strategic product for any country. We want to increase the plate production. We want to produce plates for the [Canadian] navy and also for bridges and other infrastructure projects, which we can produce today."

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https://www.algoma.com/our-products/plate/

Armour
High hardness steel for ballistic applications
Algoma is one of North America’s leading producers
of Armour Plate which is used in ballistic and blast
protection applications, such as tanks, trucks, personnel
carriers, and other vehicles. Algoma’s Armour Plate is
used by the U.S. Armed Forces as well as the armed
forces of other countries around the world.
Through control over the raw ingredients that are
used to produce the Armour Plate grades, combined
with tight control of our production process, including
the rapid quench system, Algoma’s Armour Plate
is well known for both its excellent properties and
surface characteristics.
Typical plate size is 96” x 288” (2440mm x 7315mm).
Algoma currently produces Armour Plate meeting the
specification requirements of MIL-DTL-46100E(MR)
Class 1.
For Armour Plate meeting other specifications,
please inquire with your Algoma Sales
Representative

Military Specifications
MIL-DTL-46100E (MR) Class 1
Thickness Range Available 0.236” (6mm) to 1.250” (31.75mm)
inclusive
Chemical composition (%) unless a range is specified,
individual values are maximums
Carbon 0.22 - 0.32
Manganese 0.60 - 0.90
Phosphorus 0.020
Sulfur 0.010
Silicon 0.20 - 0.40
Chromium 0.40 - 0.70
Nickel 0.35 - 0.85
Molybdenum 0.20 - 0.35
Copper 0.25
Boron 0.003