1、Designation:A61079(Reapproved 2014)Standard Test Methods forSampling and Testing Ferroalloys for Determination of Size1This standard is issued under the fixed designation A610;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year
2、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 These test methods cover procedures for the samplingand testing of the various ferroalloys for sizing,either before oraf
3、ter shipment from the plants of the manufacturers.1.2 They are designed to give results representative of eachlot that will be comparable with the manufacturers certifiedanalysis for the same lot.1.3 The purchaser may use any sampling procedure hedesires,but the results obtained on such samples shal
4、l not be abasis for complaint or rejection,unless the procedure followedis of an accuracy equivalent to that prescribed in these testmethods.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provid
5、ed for information onlyand are not considered standard.1.4.1 ExceptionThe SI units that correspond to mesh sizesin Table 1 are to be regarded as standard.1.5 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
6、 standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E11 Specification for Woven Wire Test Sieve Cloth and TestSievesE32 Practices for Sampling Ferroalloys and Steel Additives
7、for Determination of Chemical Composition3.Unit Quantities for Sampling and Testing3.1 Each shipment,except as otherwise agreed upon by thepurchaser and the manufacturer,shall constitute a unit forsampling and testing.It is recommended that shipments of anyalloy exceeding 100 tons(91 000 kg)be divid
8、ed into smallerlots for sampling according to some plan best adapted to thematerial and conditions,such as each cast,each carload,eachladleful or each binful.The division of samples should be inaccordance with Practices E32.4.Sampling for Size Analysis4.1 LumpsConformance of lump material to sizing
9、stan-dards normally shall be judged by visual examination.Theinspection judgment shall be made on an increment selected atrandom.Unless otherwise required,the increment shall be thecontents of a unit container of 2000 lb(910 kg)minimumquantity.When more precise data are required for checking onthe v
10、isual examination,a sizing test shall be made on materialfrom a unit container(usually 2000 to 3000 lb(910 to 1360 kg)of alloy)selected at random.4.2 Crushed or PlatesSampling for conformance ofcrushed or plates material to size requirements shall be inaccordance with Practices E32 or by alternative
11、 methods whichare demonstrated to yield equivalent results.A representativeportion of the lot sample(before any reduction in particle size)shall be obtained for screen testing.If necessary,the percentageof sample taken shall be increased to provide sufficient samplein the half reserved for screen te
12、sting.4.2.1 Table 1 lists the amount of material that is to be usedfor size analysis.4.2.2 If the top size of the material is 2 in.(50.8 mm)orsmaller,the portion for screen test shall be taken from the lotsample by riffling;in larger sizes,by mixing and quartering.Prior to riffling,the starting amou
13、nt each time must be mixedby coning at least twice.5.Testing for Size Analysis5.1 Samples used for screen testing must be dry.If there isa question as to whether the material is suitably dry,a criterionof 0.25%loss in weight at 230F(110C)applies.5.2 With respect to size characteristics,ferroalloys a
14、reusually classified as either“lump”or“crushed”sizes.Althoughthe line of demarcation may vary somewhat,the crushedcategory refers usually to those sizes that have an upper limitof 4 in.(102 mm)or less.The lump sizes involve all of theother categories that are coarser than 4 in.in top size.1These tes
15、t methods are under the jurisdiction of ASTM Committee A01 onSteel,Stainless Steel and Related Alloys and are the direct responsibility ofSubcommittee A01.18 on Castings.Current edition approved Oct.1,2014.Published October 2014.Originallyapproved in 1970.Last previous edition approved in 2009 as A6
16、10 79(2009).DOI:10.1520/A0610-79R14.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3 LumpsUsing either weight or lineal measurements ascriterion,hand select all pieces from the container that exceedthe