| Rolled Homogeneous Armour |
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Information AboutRolled Homogeneous Armour |
| CATEGORIES ABOUT ROLLED HOMOGENEOUS ARMOUR | |
| vehicle armour | |
| steels | |
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Rolled homogeneous armour, or RHA, is a theoretical basic type of steel plate, used as a baseline to compare the effectiveness of military Vehicle Armour . Through the end of World War II , the type of armour for almost all Tank s and other armoured vehicles was sheets of Steel . Increasing the protection on a vehicle meant adding thicker sheets of steel, increasing the vehicle's weight and reducing its mobility. Since then, other forms of armour, incorporating empty spaces and materials such as Ceramic s or Depleted Uranium in addition to steel, have been developed. Made ineffective by modern weapons using high-impact or high-temperature cutting jets, RHA itself is obsolete due to advances in vehicle armor. The more recent term RHAe (Rolled Homogeneous Armour equivalency) is used when giving a rough estimate of either the penetrative capability of a Projectile or the protective capability of a type of Armour which may or may not be Steel . Because of variations in armor shape, quality, material, and case-by-case performance, the usefulness of RHAe in comparing different armour is debatable. SPECIFICATIONS For current United States Army use, RHA steel is produced to Military standard MIL-A 12560 by several manufacturers. The newest standard used is MIL-A-46100. http://www.intlsteel.com/PDFs/armor.pdf , accessed Sept 21, 2006 It is very similar to but not identical to standard high strength steel alloy 4340 in the AISI Steel Grades , though mechanical properties are very similar to that alloy. http://www.eng-tips.com/viewthread.cfm?qid=159941&page=6 , accessed Sept 21, 2006 REFERENCES SEE ALSO |
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