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Tungsten: Difference between revisions
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Pure tungsten is steel-gray to tin-white and is a hard metal. Tungsten can be cut with a hacksaw when it is very pure (it is brittle and hard to work when impure) and is otherwise worked by forging, drawing, extruding, or sintering. Of all metals this element has the highest melting point (3,422 °C) (6,192 °F), lowest vapor pressure and the highest tensile strength. Tungsten has the lowest coefficient of thermal expansion of any pure metal. Its corrosion resistance is excellent and it can be attacked only slightly by most mineral acids. Tungsten metal forms a protective oxide when exposed to air but can be oxidized at high temperature. Steel alloyed with small quantities of tungsten greatly increases its toughness. | Pure tungsten is steel-gray to tin-white and is a hard metal. Tungsten can be cut with a hacksaw when it is very pure (it is brittle and hard to work when impure) and is otherwise worked by forging, drawing, extruding, or sintering. Of all metals this element has the highest melting point (3,422 °C) (6,192 °F), lowest vapor pressure and the highest tensile strength. Tungsten has the lowest coefficient of thermal expansion of any pure metal. Its corrosion resistance is excellent and it can be attacked only slightly by most mineral acids. Tungsten metal forms a protective oxide when exposed to air but can be oxidized at high temperature. Steel alloyed with small quantities of tungsten greatly increases its toughness. | ||
Tungsten is used by the [[UNSC]] in the manufacture of [[Magnetic Accelerator Cannon]] rounds, combined with [[iron|ferrous material]], and used by [[UNSC Navy]] warships as high-penetration projectiles. The weapons technology was eventually miniaturized and the metal was also used in the composition of the M645 FTP-HE round used in the [[ARC-920]] railgun. The 14. | Tungsten is used by the [[UNSC]] in the manufacture of [[Magnetic Accelerator Cannon]] rounds, combined with [[iron|ferrous material]], and used by [[UNSC Navy]] warships as high-penetration projectiles. The weapons technology was eventually miniaturized and the metal was also used in the composition of the M645 FTP-HE round used in the [[ARC-920]] railgun. The 14.5×114mm Armor-Piercing Fin-Stabilizing Discarding Sabot (APFSDS) rounds of the [[Sniper Rifle System 99D-S2 Anti-Matériel|S2 AM sniper rifle]] series are composed of tungsten. The metal can also be layered with [[Titanium-A armor]] to give the armor a radiation absorbtion rating of 5 and presumably grant greater protection against [[plasma]] weaponry.<ref>'''Halo: Evolutions - Essential Tales of the Halo Universe''', "The Impossible Life and the Possible Death of Preston J. Cole", ''page 475''</ref> | ||
The blade on the reverse end of the [[Type-2 Energy Weapon/Hammer|Gravity hammer]] is usually made with a tungsten-alloy. | The blade on the reverse end of the [[Type-2 Energy Weapon/Hammer|Gravity hammer]] is usually made with a tungsten-alloy. | ||