or armor plating
Origin of armor plate
Examples from the Web for armor plate
Although on occasions they tried to use us as tanks, it was not successful, for our armor-plate was too light.War in the Garden of Eden|Kermit Roosevelt
The naval officers and experts are all crying out against the folly of the Government engaging in the manufacture of armor-plate.
Another use of vanadium is in chrome-vanadium steels for armor-plate and automobiles.The Economic Aspect of Geology|C. K. Leith
The Secretary did make the inquiries, and found that the actual cost of making a ton of armor-plate was $197.78.
Of course, the character of armor-plate has been vastly improved since that time.Defenseless America|Hudson Maxim