ASTM_A_835_-_A_835M_-_10_2015.pdf

Designation:A835/A835M10(Reapproved 2015)Standard Specification forSizes of Ferroalloys and Alloy Additives1This standard is issued under the fixed designation A835/A835M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers standard nominal sizes andsize tolerances of screened ferroalloy and alloy additiveproducts.This specification provides a range of sizes asreferenced in all ASTM specifications for ferroalloys and alloyadditives.1.2 The sizes and tolerances allow for varying degrees offriability upon receipt of material since some attrition may beexpected in transit,storage,and handling.1.3 Specifications of sieve sizes used to define tolerancesare listed in Specification E11.Representative procedures forevaluation of each lot are described in Methods A610.Refer toAppendix X1 for applicable sieve designations(see TableX1.1).1.4 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.1.4.1 This specification is expressed in both inch-poundunits and in SI units(Within the text,the SI units are shown inbrackets);however,unless the purchase order or contractspecifies the applicable M specification designation(SI units),the inch-pound units shall apply.2.Referenced Documents2.1 ASTM Standards:2A610 Test Methods for Sampling and Testing Ferroalloys forDetermination of SizeE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Dimensional Requirements3.1 Screened products shall conform to the sizes given inTable 1.3.1.1 The sizes listed in Table 1 are typical as shipped fromthe manufacturers plant.Ferroalloys exhibit varying degreesof friability;therefore,some attrition may be expected intransit,storage,and handling.A quantitative test is not avail-able for rating relative friability of ferroalloys.A code systemhas been developed,therefore,for this purpose,and a numberrating each product type is given.NOTE1For further description of friability ratings for ferroalloys,refer to Appendix X2.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved Nov.1,2015.Published November 2015.Originallyapproved in 1984.Last previous edition approved in 2010 as A835/A835M 10.DOI:10.1520/A0835_A0835M-10R15.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 TABLE 1 Requirements for Screened ProductsANominalSize,in.mmStandardOrderedSize,in.mmMaximumAllowableOversizeMaximumAllowableUndersizeFriabilityRatingCodeNo.BSize in.mmPercentSize in.mmPercentLump to Crushed Sizes:6 1508 200by 4100to 1025010%through4 10010%165 1258 200by 250to 1025010%through2 5010%164 1006 150by 250to 820010%through2 5010%16312905 125by 250to 717510%through2 5010%163 75(A)5 125by 125to 717510%through1 2510%163 75(B)4 100by 250to 615010%through2 5010%16212654 100by 125to 615010%through1 2510%16214604 100by1215to 512510%through121510%162 503 75by 125to 410010%through1 2510%16112403 75by1215to 410010%through121510%16114302 50by1215to 37510%through121510%16118302 50by145to 37510%through14510%16Small Crushed Sizes by Down:2 504 100by Dto512510%through121515%16112403 75by Dto 410010%through18315%161 252 50by Dto 37510%through18315%14to 3758%throughNo.820%5,612151 25by Dto 1124010%throughNo.1615%14to 112408%throughNo.2015%5,6141215by Dto342010%throughNo.2015%14to34208%throughNo.7020%5,6AFor screened products below12in.15 by down-crushed sizes,size tolerancesshould be agreed upon between manufacturer and purchaser.BSee Appendix X2 for description of rating code.A835/A835M 10(2015)2 APPENDIXES(Nonmandatory Information)X1.APPLICABLE SIEVE DESIGNATIONSX2.FRIABILITY RATINGS OF FERROALLOYSX2.1 Descriptions of material of each friability rating aregiven in Table X2.1.TABLE X1.1 Sieve DesignationStandardAlternative250 mm10 in.200 mm8 in.175 mm7 in.150 mm6 in.125 mm5 in.100 mm4 in.75 mm3 in.50 mm2 in.25 mm1 in.19 mm34in.12.5 mm12in.6.3 mm14in.3.1 mm18in.2.36 mmNo.81.18 mmNo.16850 mANo.20212 mNo.70A1000 m=1 mm.TABLE X2.1 Friability Ratings of FerroalloysFriabilityCodeNo.Description1Very tough materials which are susceptible to little,if any,b