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Billon (alloy) (10938 views - Material Database)

Billon is an alloy of a precious metal (most commonly silver, but also mercury) with a majority base metal content (such as copper). It is used chiefly for making coins, medals, and token coins. The word comes from the French bille, which means "log".
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Billon (alloy)

Billon (alloy)

Billon /ˈbɪlən/ is an alloy of a precious metal (most commonly silver, but also mercury) with a majority base metal content (such as copper). It is used chiefly for making coins, medals, and token coins.

The word comes from the French bille, which means "log".[1]

Description

The use of billon coins dates from ancient Greece and continued through the Middle Ages. During the 6th and 5th centuries BC, some cities on Lesbos Island used coins made of 60% copper and 40% silver. In both ancient times and the Middle Ages, leaner mixtures were adopted, with less than 2% silver content.[2][3]

Billon coins are perhaps best known from the Roman Empire, where progressive debasements of the Roman denarius and the Roman provincial tetradrachm in the 2nd century AD led to declining silver and increasing bronze content in these denominations of coins. Eventually, by the third quarter of the 2nd century AD, these coins were almost entirely bronze, with only a thin coating or even a wash of silver.[4]

It was also used for low-denomination coins of the pound Scots: the bawbee (sixpence), turner (twopence) and penny.

See also


Alnico알루미늄알루미늄 합금Aluminium-lithium alloyArsenical copper베릴륨베릴륨구리BirmabrightBismanol비스무트크로뮴Chromium hydride코발트구리두랄루민갈륨유리HiduminiumHydronalium인듐ItalmaMagnalium마그네슘Megallium머큐리니크롬니켈플라스틱Plexiglas플루토늄칼륨로듐Rose's metal사마륨스칸듐나트륨스테인리스강강철StelliteStructural steel주석 (원소)타이타늄우라늄Vitallium우드 합금Y alloy아연지르코늄황동Calamine brassChinese silverDutch metalGilding metalMuntz metalPinchbeck (alloy)Tombac청동알루미늄 청동Arsenical bronzeBell metalFlorentine bronzeGlucydurGuanín (bronze)GunmetalPhosphor bronzeOrmoluSpeculum metalConstantanCopper hydrideCopper–tungstenCorinthian bronzeCunife백동Cymbal alloysDevarda's alloy호박금HepatizonManganinMelchior (alloy)양은Molybdochalkos노르딕 골드ShakudōTumbagaAlGaGalfenolGalinstanColored goldRhoditeCrown goldElinvarField's metalFernicoFerroalloy페로세륨FerrochromeFerromanganeseFerromolybdenumFerrosiliconFerrotitaniumFerrouraniumInvar주철Iron–hydrogen alloy선철Kanthal (alloy)KovarStaballoySpiegeleisenBulat steelCrucible steel41xx steel다마스쿠스 강MangalloyHigh-speed steelMushet steelMaraging steelHigh-strength low-alloy steelReynolds 531Electrical steelSpring steelAL-6XNCelestriumAlloy 20Marine grade stainlessMartensitic stainless steelSanicro 28Surgical stainless steelZeron 100Silver steelTool steelWeathering steelWootz steel땜납TerneType metalElektron (alloy)아말감Magnox (alloy)AlumelBrightrayChromelHaynes InternationalInconelMonelNicrosilNisilNickel titaniumMu-metal퍼멀로이SupermalloyNickel hydridePlutonium–gallium alloy나크Mischmetal리튬Terfenol-DPseudo palladiumScandium hydrideSamarium–cobalt magnetArgentium sterling silverBritannia silverDoré bullionGoloidPlatinum sterlingShibuichi스털링 실버Tibetan silverTitanium Beta CTitanium alloyTitanium hydrideGum metalTitanium goldTitanium nitride배빗메탈Britannia metal퓨터Queen's metalWhite metalUranium hydrideZamakZirconium hydride수소헬륨붕소질소산소플루오린메테인Mezzanine원자

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