ASTM_B_560_-_00_2014.pdf

Designation:B56000(Reapproved 2014)Standard Specification forModern Pewter Alloys1This standard is issued under the fixed designation B560;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers three alloy types,made fromtin,antimony,and copper,used in the fabrication of pewterarticles by casting,spinning,drawing,or forming.The metalmay be supplied in the form of bars,ingots,rolled sheet,andcircles.1.2 Pewter alloy shall be defined as having a compositionwithin the range from 90 to 98%tin,1 to 8%antimony,and0.25 to 3%copper.Compositions are given in Table 1.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateMaterial Safety Data Sheet(MSDS)for this product/materialas provided by the manufacturer,to establish appropriatesafety and health practices,and determine the applicability ofregulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE51 Method for Spectrographic Analysis of Tin Alloys bythe Powder Technique(Withdrawn 1983)3E57 Methods for ChemicalAnalysis of White Metal BearingAlloys(Withdrawn 1986)3E88 Practice for Sampling Nonferrous Metals and Alloys inCast Form for Determination of Chemical Composition3.Classification3.1 The hardness and workability of pewter varies with theamount of antimony and copper alloyed with the tin.Castingalloys generally contain less copper and a slightly higher tincontent than sheet alloys.The composition for castings(Type1)and sheet(Type 2)are shown in Table 1,but individualfabricators may choose compositions in the range given foreach type.Aspecial-purpose alloy(Type 3),high in tin,is usedfor articles requiring a softer metal.All types must conform tothe impurity limits shown in Table 1.3.2 The following applies to all specified limits in thisstandard:For purposes of determining conformance with thesespecifications an observed value or a calculated value shall berounded“to the nearest unit”in the last right-hand place offigures used in expressing the limiting value,in accordancewith the rounding method of Practice E29.4.Ordering Information4.1 Orders for material under this specification shouldinclude the following:4.1.1 Quantity,4.1.2 Formbars,sheet,or circles,4.1.3 Type and composition(Table 1),4.1.4 Size(sheetthickness,width and length;circlesthickness and diameter),and4.1.5 Marking.5.Materials and Manufacture5.1 The manufacturer shall use care to have each shipmentof each form as uniform in quality and composition as possibleand of a commercially satisfactory appearance.6.Chemical Composition6.1 The material shall conform to the requirements as tochemical composition specified in Table 1.Nominalcompositions,agreed upon by the manufacturer and purchaser,may be prescribed under this specification.7.Dimensions,Mass,and Permissible Variations7.1 Sheet pewter is commercially available in thicknessesfrom 0.031 to 0.064 6 0.002 in.(0.79 to 1.63 mm)(Table 2).Thinner sheet down to a thickness of 0.010 in.(0.25 mm)canbe supplied to special order.Sheet can be supplied in widths upto 2 ft(0.6 m)and lengths up to 4 ft(1.2 m).1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.02 on Refined Lead,Tin,Antimony,and Their Alloys.Current edition approved Oct.1,2014.Published October 2014.Originallyapproved in 1972.Last previous edition approved in 2010 as B560 00(2010).DOI:10.1520/B0560-00R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.2 Circles are available in diameters from 2 to 20 in.(50.8to 508 mm)and in thicknesses from 0.031 to 0.064 6 0.002 in.(Table 2).7.3 Bars or ingots are nominally 5 lb(2.27 kg)in mass.8.Workmanship,Finish,and Appearance8.1 Surface defects in bars or ingots are of no importance.Surface defects in sheet pewter or circles may be a cause forrejection if the defects(pits or dents)cannot be removed to thetotal