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MIL-DTL-46177 is an older, now-replaced standard for a high hardness steel RHA. [4] 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]
Lamellar armour is a type of body armour made from small rectangular plates (scales or lamellae) of iron, steel, leather , bone, or bronze laced into horizontal rows. Lamellar armour was used over a wide range of time periods in Central Asia , Eastern Asia (especially in China , Japan , Korea , Mongolia , and Tibet ), Western Asia , and Eastern ...
Rolling and forging (hammering the steel when it is red hot) irons out the grain structure in the steel, removing imperfections which would reduce the strength of the steel. [5] Rolling also elongates the grain structure in the steel to form long lines, which enable the stress the steel is placed under when loaded to flow throughout the metal ...
Specific metal items can be melted back to their respective bars. Without steel, the alloy bronze or regular iron are the next best suitable metals to use. Bronze requires two ores or bars of tin and copper. The metal adamantine, found deep below, is extremely light but very strong, making it excellent for sharp weapons and armor. Raw ...
Bronze, or bronze-like alloys and mixtures, were used for coins over a longer period. Bronze was especially suitable for use in boat and ship fittings prior to the wide employment of stainless steel owing to its combination of toughness and resistance to salt water corrosion. Bronze is still commonly used in ship propellers and submerged bearings.
There was a 150-year period in which better and more metallurgically advanced steel armor was being used, precisely because of the danger posed by the gun. Hence, guns and cavalry in plate armor were "threat and remedy" together on the battlefield for almost 400 years. By the 15th-century, Italian armor plates were almost always made of steel. [12]
Bronze muscle cuirass, Italy, c. 350–300 BC. Partial plate armour, made out of bronze, which protected the chest and the lower limbs, was used by the ancient Greeks, as early as the late Bronze Age. The Dendra panoply protected the entire torso on both sides and included shoulder and neck protections.
The materials that make up naval armour have evolved over time, beginning with simply wood, then softer metals like lead or bronze, to harder metals such as iron, and finally steel and composites. Iron armour saw wide use in the 1860s and 1870s, but steel armor began to take over because it was stronger, and thus less could be used.