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Platinum sterling (5614 views - Material Database)

Platinum Sterling is a registered trademark name of ABI Precious Metals, Inc. The trademark covers a range of alloys whose primary constituents are platinum and silver, primarily used in jewellery. The range of Platinum Sterling alloys was developed in 2003 by Marc Robinson, and its solder was created by Chuck Bennett.
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Platinum sterling

Platinum sterling

Platinum Sterling is a registered trademark name of ABI Precious Metals, Inc. The trademark covers a range of alloys whose primary constituents are platinum and silver, primarily used in jewellery.[1] The range of Platinum Sterling alloys was developed in 2003 by Marc Robinson, and its solder was created by Chuck Bennett.

Properties

The platinum is used to replace at least some of the copper present in a typical sterling silver alloy, which provides a greater light reflectivity (by refining the grain structure) and resistance to tarnish (thought to be caused by oxidation of copper) than standard sterling silver.

Platinum Sterling is a cheaper alternative to white gold.[citation needed] It is also allegedly hard wearing and very white and so does not require rhodium plating like white gold.[2]

Composition

The composition of Platinum Sterling is published; three alloys are commercially available, all containing standard 92.5% sterling silver and 1%, 3.5% or 5% platinum.[3] A small amount of gallium can also be added to the alloy to ease manufacturing.

The patent application for Platinum Sterling claims:

A metal alloy having a composition consisting essentially of 90.5–95.5% silver by weight, about 0.5–6% platinum by weight, about 0.7–4% copper by weight, about 0.1–2% gallium by weight, about 1–3% tin by weight, about 1–2.5% germanium by weight, about 0.5–4% zinc by weight, and about 0.1–0.2% silicon by weight.
— [4]

The claim also states:

...the preferred embodiments of the present invention provide a metal alloy comprising about 90.5–95.5% silver, about 0.5–6% platinum, about 0.7–4% copper, and about 0.1–2% gallium. In some embodiments, the alloy further comprises about 0.5–4% zinc, about 0–0.2% silicon, about 0–0.3% boron and about 0–1.5% indium. In other embodiments, the alloy further comprises about 0–3% tin and about 0–2.5% germanium.

See also


41xx steelAL-6XNAlGaAlloy 20鋁鎳鈷合金Alumel鋁合金Aluminium bronzeAluminium-lithium alloy汞齊Argentium sterling silverArsenical bronzeArsenical copperBell metalBeryllium copperBillon (alloy)BirmabrightBismanol黃銅BrightrayBritannia silver青铜Bulat steelCalamine brass铸铁CelestriumChinese silverChromelChromium hydride白金 (合金)康銅氢化亚铜Copper–tungstenCorinthian bronzeCrown goldCrucible steelCunife白铜Cymbal alloys大馬士革鋼Devarda's alloyDoré bullion杜拉鋁Dutch metal电工钢琥珀金Elektron (alloy)ElinvarFernicoFerroalloyFerroceriumFerrochromeFerromanganeseFerromolybdenumFerrosiliconFerrotitaniumFerrouraniumField's metalFlorentine bronzeGalfenolGalinstanGilding metal玻璃GlucydurGoloidGuanín (bronze)GunmetalHaynes InternationalHepatizonHiduminium高速鋼High-strength low-alloy steelHydronalium英高鎳合金不變鋼Iron–hydrogen alloyItalmaKanthal (alloy)Kovar镁铝合金Magnox (alloy)MangalloyManganin马氏体时效钢Marine grade stainless马氏体不锈钢MegalliumMelchior (alloy)MercuryMischmetalMolybdochalkosMonelΜ合金Muntz metalMushet steelNichromeNickel hydrideNickel silverNickel titaniumNicrosilNisil北歐金Ormolu透磁合金Phosphor bronze生鐵Pinchbeck (alloy)塑料PlexiglasPlutonium–gallium alloyPseudo palladiumReynolds 531銠金礦Rose's metal釤鈷磁鐵Sanicro 28Scandium hydrideShakudōSilver steel钠钾合金銲料Speculum metalSpiegeleisenSpring steelStaballoy不鏽鋼Stellite钢结构超導磁率合金Surgical stainless steelTerfenol-DTerneTombacTool steelTumbagaType metal維塔立合金耐候钢伍德合金烏茲鋼Y alloyZeron 100ShibuichiSterling silverTibetan silverTi Beta-C.Titanium alloy氢化钛Gum metalTitanium gold氮化钛巴氏合金Britannia metalPewterQueen's metalWhite metal氢化铀ZamakZirconium hydride甲烷Mezzanine原子

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