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The side and rear hull armor consisted of two 0.25 in (6.4 mm) steel plates one inch apart and 3.5 in (89 mm) away from the aluminum armor. The hull top, bottom, and front consisted of 5083 aluminum armor, and 0.357 in (9.1 mm) steel armor was added to the front third of the hull bottom to increase mine 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 ]
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.
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 ...
The hull of the EIFV is of all-welded 5083 aluminum armour which provides protection from small arms fire and shell splinters, able to defeat armour-piercing projectiles up to 14.5 mm in calibre over a 360° arc of attack. [3] Aluminum provides protection similar to that of steel armor while keeping the vehicle lightweight.
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.
A Chinese publication lists 30MnCrNiMo "685" steel as the material used in Chinese rolled armor plates, with a Brinell Hardness of HBW 444-514 (thin) / 429-495 (thick). According to the same publication, older vehicles use a 22SiMn2TiB "616" steel with a hardness of HBS ≤ 219. [6]
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.