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The M113 is built of 5083 aircraft-quality aluminum alloy. Aluminum alloy is lighter than steel but requires around three times the thickness for an equivalent level of ballistic protection, meaning the armor of the M113 was only designed for 7.62 mm and shell splinter protection.
5083 aluminium alloy is an aluminium–magnesium alloy with magnesium and traces of manganese and chromium. It is highly resistant to attack by seawater and industrial chemicals. [1] Alloy 5083 retains exceptional strength after welding.
The M2's base armor consists of an all-around 1 inch (25.4 mm) thick aluminum hull (mix of no. 5083 and no. 7039 alloys), heavily sloped in the front and mostly vertical on the sides and rear. The bottom of the hull front has an additional 0.375 inch (9.5 mm) thick steel applique plate, primarily intended to protect against mines.
The basic hull of the AGS is made of welded 5083 aluminum alloy, [6] with a modular armor system that allows the vehicle to be equipped according to requirements. [8] Aluminum was chosen instead of steel in order to reduce the weight of the vehicle. The weight limit for the vehicle was driven by the requirement that it be capable of LVAD. [131 ...
RHA is homogeneous because its structure and composition are uniform throughout its thickness. The opposite of homogeneous steel plate is cemented or face-hardened steel plate, where the face of the steel is composed differently from the substrate. The face of the steel, which starts as an RHA plate, is hardened by a heat-treatment process.
A ballistic plate, also known as an armour plate, is a protective armoured plate inserted into a carrier or bulletproof vest, that can be used stand-alone, or in conjunction with other armour. "Hard armour" usually denotes armour that uses ballistic plates. It serves to defeat higher threats, and may be considered as a form of applique armour.
The upgraded armor consisted of a folded aluminum plate installed under each sponson for the first three road wheels on each side of the vehicle. In 1970, a further 38 mm of aluminum armor was fitted along the entire bottom of the hull, which greatly reduced crew and passenger casualties even from large mines.
The plates can be made of any material and are designed to be retrofitted to an AFV to withstand weapons that can penetrate the original armour of the vehicle. [ 17 ] [ 18 ] An advantage of appliqué armour is the possibility to tailor a vehicle's protection level to a specific threat scenario.
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