China (Mainland) Tungsten Rings

Specifications: Tungsten fashion introduce About tungsten While relatively new to fine jewelry, tungsten was discovered more than two hundred years ago. Here is more information about tungsten and tungsten carbide. Tungsten is an essential part of modern life, used in industry and homes around the world. Description: Tungsten is a naturally occurring element.

It occurs in rocks and minerals combined with other chemicals, but never as a pure metal. Elemental tungsten is a white to steel gray metal (depending on the purity) that can be used in pure form or mixed with other metals to make alloys. Pure tungsten is a shiny white metal and, in its purest form, is quite malleable and can easily be processed.

Usually, however, it contains small amounts of carbon and oxygen, which give tungsten metal its considerable hardness. Symbol: W Atomic number:74 Atomic weight:183.85 Density 293 k:19.3 g/cm3 Atomic volume:9.53 cm3/mol Hardness: Greater than 8 1/2 on the mohs scale.

Compare to gold (2) and platinum (4) Discovered:1783 Tungsten carbide: W2c, wc Industrial uses: Cemented carbide, furnace elements, heat sinks, electrodes, boring bars, precision tools, welding tips, high temperature tooling, vibration sensing devices Consumer uses: X-ray shielding, light bulb filaments, watches, magnetrons for microwave ovens About tungsten rings Tungsten rings are composed of a metal alloy, tungsten carbide.

The alloy allows for maximum hardness and rigidity without sacrificing tensile strength. Each tungsten carbide ring is cut and polished with diamond tools. Tungsten rings are not sizable by ordinary jewelers\'\' tools -- the metal is too hard. Most tungsten metal powder is converted to tungsten carbide (wc) by reaction with pure carbon powder, e. G.

Carbon black, at 900 - 2200c in pusher or batch furnaces, a process called carburisation. The material Tungsten is extremely hard and dense. Combined with carbon and other elements, it becomes tungsten carbide, which registers between 8-9 on the mohs hardness scale. It is roughly 10 times harder than 18k gold and four times harder than titanium.

In addition to its design and high polish, part of its attraction to consumers is its technical nature, says west. Tungsten is processed with carbon and other elements and mixed in a powder form. The mixed powder is compressed into high-pressure dies to form a ring blank.

The blank is sintered (fired) in an oxygen-free furnace at over 2,400&mac251;f, resulting in a solid tungsten carbide ring blank. The rough blank goes through a 30-stage precision grinding process by craftspeople using diamond-embedded grinding tools held in specially designed machinery.

Rings with platinum or gold inlays are made by grinding a groove into the center of the ring and, using west is patented process, fusing the precious metal within the groove.