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Terne (5478 views - Material Database)

Terne plate is a form of tinplate: a thin steel sheet coated with an alloy of lead and tin. The terne alloy was in the ratio of 10-20% tin and the remainder lead. The low tin content made it cheaper than other tinplates. Terne plate was used for tinsmithed sheet metal goods, such as storage vessels, jugs and funnels, particularly for industrial use with flammable liquids. Unlike tinplate, it was not used for long-term storage or around food items, owing to the high lead content. Terne plate has also been used for roofing, as a cheaper alternative to zinc or lead. Until the year 2012 lead had been replaced with the metal zinc and was used in the ratio of 50% tin and 50% zinc. This alloy had a low melting point of approximately 360 degrees Fahrenheit but is no longer available. Today terne coated metal is coated with 99.9% tin, instead of hot-dipping, a more consistent galvanic deposition process is applied. Additionally the substrate has been changed from steel to stainless steel, benefitting from the corrosion resistance of stainless steel alloys. The pure tin alloy makes soldering easier, as the melting point is homogenised and doesn't need to match the melting point of two metals with different melting temperatures.
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Terne

Terne

Terne plate is a form of tinplate: a thin steel sheet coated with an alloy of lead and tin. The terne alloy was in the ratio of 10-20% tin and the remainder lead. The low tin content made it cheaper than other tinplates.

Terne plate was used for tinsmithed sheet metal goods, such as storage vessels, jugs and funnels, particularly for industrial use with flammable liquids. Unlike tinplate, it was not used for long-term storage or around food items, owing to the high lead content. Terne plate has also been used for roofing, as a cheaper alternative to zinc or lead.

Until the year 2012 lead had been replaced with the metal zinc and was used in the ratio of 50% tin and 50% zinc. This alloy had a low melting point of approximately 360 degrees Fahrenheit but is no longer available.[citation needed] Today terne coated metal is coated with 99.9% tin, instead of hot-dipping, a more consistent galvanic deposition process is applied. Additionally the substrate has been changed from steel to stainless steel, benefitting from the corrosion resistance of stainless steel alloys. The pure tin alloy makes soldering easier, as the melting point is homogenised and doesn't need to match the melting point of two metals with different melting temperatures.

Use

Terne was historically used to coat sheet steel to inhibit corrosion. It was one of the cheapest alloys suitable for this, and the tin content was kept at a minimum while still adhering to a hot-dipped iron sheet, to minimize the cost.[citation needed]

Historical terne metal must be painted. If the paint is maintained, terne metal can last 90 years or more. Terne coated stainless steel (TCS II or Roofinox) or copper is commonly used to replace terne metal roofs as either material will outlast terne metal. Terne coated stainless steel roofing can last 100 years or more unpainted, copper roofing can last 50 years or more unpainted.[citation needed]

Terne II used zinc in place of lead for environmental reasons.[citation needed] Today's main reason and benefit of the tin coating is its aesthetic behavior. Tin develops a natural matte grey patina when exposed to the elements. The result of the weathering process depends on the environment and climate conditions present. Depending on the environment and atmospheric conditions different substrate alloys are used. The stainless steel alloy 439 is ferritic and is used for normal environments; for coastal applications, the austenitic stainless steel alloy 316L is used providing an increased corrosion resistance to chlorides.

Terminology

Terne-coated steel is also known as terne-metal and often referred to as "tin" (see the Slate Roof Bible). Traditional terne-coated steel cannot be purchased anymore, it had been replaced by a terne coated stainless steel product (Roofinox tin-plated (Terne)), available at most roofing supply stores.[citation needed]

See also


41xx steelAL-6XNAlGaAlloy 20Alnico알루미늄알루미늄 합금알루미늄 청동Aluminium-lithium alloyArsenical bronzeArsenical copperBell metal베릴륨베릴륨구리Billon (alloy)BirmabrightBismanol비스무트황동청동Bulat steelCalamine brass주철CelestriumChinese silver크로뮴Chromium hydride코발트Colored goldConstantan구리Copper hydrideCopper–tungstenCorinthian bronzeCrown goldCrucible steelCunife백동Cymbal alloys다마스쿠스 강Devarda's alloy두랄루민Dutch metalElectrical steel호박금ElinvarFernicoFerroalloy페로세륨FerrochromeFerromanganeseFerromolybdenumFerrosiliconFerrotitaniumFerrouraniumField's metalFlorentine bronzeGalfenolGalinstan갈륨Gilding metal유리GlucydurGuanín (bronze)GunmetalHepatizonHiduminiumHigh-speed steelHigh-strength low-alloy steelHydronalium인듐InvarIron–hydrogen alloyItalmaKanthal (alloy)KovarMagnalium마그네슘MangalloyManganinMaraging steelMarine grade stainlessMartensitic stainless steelMegalliumMelchior (alloy)머큐리MolybdochalkosMuntz metalMushet steel니크롬니켈양은노르딕 골드OrmoluPhosphor bronze선철Pinchbeck (alloy)플라스틱Plexiglas플루토늄칼륨Reynolds 531Rhodite로듐Rose's metal사마륨Sanicro 28스칸듐ShakudōSilver steel나트륨땜납Speculum metalSpiegeleisenSpring steelStaballoy스테인리스강강철StelliteStructural steelSurgical stainless steel주석 (원소)타이타늄TombacTool steelTumbaga우라늄VitalliumWeathering steel우드 합금Wootz steelY alloyZeron 100아연지르코늄Type 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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