Advancements in Steel for Weight Reduction of P900 Armor Plate
Ballistic tests were conducted on a high-manganese and high-aluminum austenitic steel that is age hard-enable. These lightweight steels (12-18% lower in density) were investigated as alternatives to MIL- PRF-32269 steel alloys for application in P900 perforated armor currently used for U.S. Army ground combat systems. Two steel plates with nominal composition in wt. % of Fe-30Mn-9AI-1Si-0.9C-0.5Mo were evaluated for V 50 against 0.30-cali-ber armor piercing and 0.50-caliber fragmentation simulation projectiles. At equivalent a real densities to current steels, both plates surpassed the required 0.30-caliber acceptance criteria by 188 and 151 feet/second. Against the 0.50-caliber fragmentation projectile, the calcium-treated plate exceeded the MIL-A-46100 V 50 by 225 feet/second, but the non-calcium-treated plate underperformed by 39 feet/second.
R. A. Howell et al., "Advancements in Steel for Weight Reduction of P900 Armor Plate," Iron and Steel Technology, Association for Iron & Steel Technology (AIST), Jan 2009.
Materials Science and Engineering
Peaslee Steel Manufacturing Research Center
Article - Journal
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