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Protection capabilities of HHA and UHA steels against long-rod kinetic energy penetrators

: Früh, Patrick; Heine, Andreas; Riedel, Werner; Wickert, Matthias

Chocron, Sidney (Ed.):
30th International Symposium on Ballistics 2017. Proceedings. Vol.2 : Long Beach, California, USA, September 11-15, 2017
Lancaster, Pa.: DEStech Publications, 2017
ISBN: 978-1-60595-419-6
International Symposium on Ballistics <30, 2017, Long Beach/Calif.>
Fraunhofer EMI ()

The protective capabilities of three different armor steels of the HHA and UHA class against a long rod penetrator (LRP) were examined. Due to the lack of commercial availability of thick armor plates, the specific ballistic behavior under overmatch conditions, and unavoidable experimental scatter, we were unable to confirm any performance differences among the steels in ballistic testing, even when compared to standard RHA. In a second approach, numerical simulations of the ballistic behavior of the armor steels based on material testing (tensile tests and planar-plate-impact tests) were performed. The simulations provided the possibility to examine the steels in unavailable configurations, i.e. thickness. With this combined approach it could be shown that UHA steels may give a considerable protection increase against LRP in diminishing their maximum effective range by at least several hundred meters compared to HHA steel.