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Abrasion resistant steel is a high-carbon alloy steel that is produced to resist wear and stress. There are several grades of abrasion resistant steel, including AR200, AR235, AR400, AR450, AR500 and AR600.
As well, the most common material, AR500 steel, or Abrasion Resistant/ Brinell Hardness 500 steel, is actually not created for armour purposes, and thus can suffer major variances in hardness According to Leeco Steel, "While often requested for ammunition target surfaces, AR500 steel plate is not certified for ballistic use". [12]
It specifies a harder steel that is nearly identical to AR500 in terms of tensile and yield strength. [5] The Brinell hardness of AR500 is in the 477-534 range. MIL-DTL-46100E specifies a steel of identical hardness. [3] MIL-DTL-32332 specifies ultra-hard steel, with Brinell hardness in excess of 570. [3]
In 1969, American Body Armor was founded and began to produce a patented combination of quilted nylon faced with multiple steel plates. This armor configuration was marketed to American law enforcement agencies by Smith & Wesson under the trade name "Barrier Vest." The Barrier Vest was the first police vest to gain wide use during high-threat ...
The Improved Modular Tactical Vest (IMTV) and Improved Scalable Plate Carrier (ISPC) are the new models. "The IMTV will be the main body armor system for Marines, the Corps plans to order about 70,000 of the improved plate carriers, far more than the estimated 10,000 to 14,000 plate carriers in use today". [30]
SAPI plates meant for body armor come in front and back plates which are identical, and smaller side plates. The front and back plates come in five sizes. Their dimensions are the following: [1] [13] Front and back SAPI plates: Extra Small - 1.27 kg (2.8 lb) | 184 x 292 mm (7¼ x 11½ in) Small - 1.59 kg (3.5 lb) | 222 x 298 mm (8¾ x 11¾ in)
Steel targets used in cowboy action shooting A smaller steel target used for airguns. Steel targets are shooting targets made out of hardened (martensitic) steel, and are used in firearm and airgun sports such as silhouette shooting, cowboy action shooting, practical/dynamic shooting, long range shooting and field target, as well as recreational plinking.
Harvey armor was a type of steel armor developed in the early 1890s in which the front surfaces of the plates were case hardened. The method for doing this was known as the Harvey process, and was invented by the American engineer Hayward Augustus Harvey. The Harvey United Steel Company was a steel cartel whose chairman was Albert Vickers.
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