Resistance of Light Gauge (.039 Inch to .051 Inch) Mn-Mo Steel as Variously Heat Treated, to Perforation by Small Arms Projectiles
Partial rept. no. 10
WATERTOWN ARSENAL LABS MA
Pagination or Media Count:
As a part of the program of development of improved body armor components, light-gauge 0.39-in to .051-in samples of Mn-Mo steel, as- quenched and after tempering at 300 F , 400 F and 500 F, have recently been tested ballistically. Of the nominal .040-in gauge samples, the as-quenched specimen offered greatest resistance to perforation by caliber .45 steel- jacketed ball projectiles, whereas the specimen tempered at 300 F offered greatest resistance to perforation by the caliber .22 fragment-simulator, G-2. The resistance of all samples behaved substantially alike and although their resistance to perforation by the caliber .45 ball projectile was slightly inferior to that of Hadfield manganese steel, their resistance to projectile G-2 substantially duplicates that of the Hadfield steel.
- Metallurgy and Metallography