1、Designation: A835/A835M 10Standard 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.
2、 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 specifi
3、cation 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 s
4、izes 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
5、 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 an
6、d 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 Fer
7、roalloysfor Determination 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 varyi
8、ng 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.NOTE 1
9、For 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 Oct. 1, 2010.
10、 Published November 2010. Originallyapproved in 1984. Last previous edition approved in 2010 as A835/A835M - 84(2010). DOI: 10.1520/A0835_A0835M-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandar
11、ds volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.TABLE 1 Requirements for Screene
12、d ProductsANominalSize,in.mmStandardOrderedSize,in.mmMaximumAllowableOversizeMaximumAllowableUndersizeFriabilityRatingCodeNo.BSize in.mmPercent Size in.mmPercentLump to Crushed Sizes:6 150 8 200by 4100to 1025010 % through4 10010 % 165 125 8 200by 250to 1025010 % through2 5010 % 164 100 6 150by 250to
13、 820010 % through2 5010 % 16312 90 5 125by 250to 717510 % through2 5010 % 163 75(A)5 125by 125to 717510 % through1 2510 % 163 75(B)4 100by 250to 615010 % through2 5010 % 16212 65 4 100by 125to 615010 % through1 2510 % 16214 60 4 100by1215to 512510 % through12 1510 % 162 50 3 75by 125to 410010 % thro
14、ugh1 2510 % 16112 40 3 75by1215to 410010 % through12 1510 % 16114 30 2 50by1215to 37510 % through12 1510 % 16118 30 2 50by145to 37510 % through14 510 % 16Small Crushed Sizes by Down:2 50 4 100by Dto512510 % through12 1515 % 16112 40 3 75by Dto 410010 % through18 315 % 161 25 2 50by Dto 375 10 % thro
15、ugh18 315 % 14to 3758 % throughNo. 820 % 5,612 15 1 25by Dto 1124010 % throughNo. 1615 % 14to 112408 % throughNo. 2015 % 5,61412 15by Dto342010 % throughNo. 2015 % 14to34208 % throughNo. 7020 % 5,6AFor screened products below12 in. 15 by down-crushed sizes, size toler-ances should be agreed upon bet
16、ween manufacturer and purchaser.BSee Appendix X2 for description of rating code.A835/A835M 102APPENDIXES(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 Desi
17、gnationStandard Alternative250 mm 10 in.200 mm 8in.175 mm 7in.150 mm 6in.125 mm 5in.100 mm 4in.75 mm 3in.50 mm 2in.25 mm 1in.19 mm34 in.12.5 mm12 in.6.3 mm14 in.3.1 mm18 in.2.36 mm No. 81.18 mm No. 16850 mANo. 20212 m No. 70A1000 m=1mm.TABLE X2.1 Friability Ratings of FerroalloysFriabilityCodeNo.Des
18、cription1 Very tough materials which are susceptible to little, if any, breakage during shipment or handling. (Example:low-carbon ferrochrome)2 Some breakage of large pieces probable in shipping and handling. No appreciable fines produced from eitherlump or crushed sizes. (Example: chrome metal)3 Ap
19、preciable reduction in size of large pieces possible in shipping and handling. No appreciable production offines in handling of crushed sizes. (Example: ferrotitanium)4 Appreciable reduction in size of large pieces upon repeated handling. Some fines produced upon repeatedhandling of crushed sizes. (
20、Example: standard ferromanganese)5 Appreciable reduction in size in repeated handling of large pieces. Appreciable fines may be produced in thehandling of crushed sizes. (Example: 50 % ferrosilicon)6 This category represents the most friable alloys. (Example: calcium silicon)A835/A835M 103SUMMARY OF
21、 CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A835/A835M 84 (2010) that may impact the use of this standard. (Approved Oct. 1, 2010.)(1) 1.4 added. (2) Table 1 revised.ASTM International takes no position respecting the validity of any pa
22、tent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revisio
23、n at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your com
24、ments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyright
25、ed by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A835/A835M 104
