1、Designation: A 835/A 835M 84 (Reapproved 2005)Standard Specification forSizes of Ferroalloys and Alloy Additives1This standard is issued under the fixed designation A 835/A 835M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the
2、year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers standard nominal sizes andsize tolerances of screened ferroalloy and alloy additive
3、products. 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 Spe
4、cifications of sieve sizes used to define tolerancesare listed in Specification E11. Representative procedures forevaluation of each lot are described in MethodsA 610. Refer toAppendix X1 for applicable sieve designations (see TableX1.1).2. Referenced Documents2.1 ASTM Standards:2A 610 Test Methods
5、for Sampling and Testing Ferroalloysfor Determination of SizeE11 Specification for Wire Cloth and Sieves for TestingPurposes3. 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
6、. 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 p
7、roduct type is given.NOTE 1For 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 ed
8、ition approved Sept. 1, 2005. Published January 2006. Originallyapproved in 1984. Last previous edition approved in 2000 as A 835 - 84(2000).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volu
9、me information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Requirements for Screened ProductsANominalSize, in.StandardOrderedSize,in.BMaximum AllowableOversizeMaximum AllowableUndersizeFriabilityRatingCodeNo.CSize Percent Size PercentLump to Crushed Sizes:6 8 by 4 to 10
10、in. 10 % through 4 in. 10 % 165 8 by 2 to 10 in. 10 % through 2 in. 10 % 164 6 by 2 to 8 in. 10 % through 2 in. 10 % 16312 5 by 2 to 7 in. 10 % through 2 in. 10 % 163 (A) 5 by 1 to 7 in. 10 % through 1 in. 10 % 163 (B) 4 by 2 to 6 in. 10 % through 2 in. 10 % 16212 4 by 1 to 6 in. 10 % through 1 in.
11、10 % 16214 4by12 to 5 in. 10 % through12 in. 10 % 162 3 by 1 to 4 in. 10 % through 1 in. 10 % 16112 3by12 to 4 in. 10 % through12 in. 10 % 16114 2by12 to 3 in. 10 % through12 in. 10 % 16118 2by14 to 3 in. 10 % through14 in. 10 % 16Small Crushed Sizes by Down:2 4 by D to 5 in. 10 % through12 in. 15 %
12、 16112 3 by D to 4 in. 10 % through18 in. 15 % 161 2 by D to 3 in. 10 % through18 in. 15 % 14to 3 in. 8 % through No. 8 20 % 5,612 1byD to112 in. 10 % through No. 16 15 % 14to 112 in. 8 % through No. 20 15 % 5,61412 by D to34 in. 10 % through No. 20 15 % 14to34 in. 8 % through No. 70 20 % 5,6AFor sc
13、reened products below12 in. by down-crushed sizes, size tolerancesshould be agreed upon between manufacturer and purchaser.B1 in. = 25.4 mm.CSee Appendix X2 for description of rating code.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United Stat
14、es.APPENDIXES(Nonmandatory Information)X1. APPLICABLE SIEVE DESIGNATIONSX2. FRIABILITY RATINGS OF FERROALLOYSX2.1 Descriptions of material of each friability rating aregiven in Table X2.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with an
15、y 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 revision at any time by the responsible technical
16、 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 comments will receive careful consideration a
17、t 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 copyrighted by ASTM International, 100 Barr Harbor
18、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.ast
19、m.org).TABLE X1.1 Sieve DesignationStandard 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 Fer
20、roalloysFriabilityCodeNo.Description1 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.
21、 (Example: chrome metal)3 Appreciable 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 repeated
22、handling of crushed sizes. (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)A 835/A 835M 84 (2005)2
