1、Designation: A144 04 (Reapproved 2009)Standard Specification forFerrotungsten1This standard is issued under the fixed designation A144; 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 parenthe
2、ses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers four grades of ferrotungsten.2. Referenced Documents2.1 ASTM Standards:2A1025 Specification for Ferroalloys and Other AlloyingM
3、aterials, General Requirements3. General Conditions for Delivery3.1 Materials furnished to this specification shall conform tothe requirements of Specification A1025, including any supple-mentary requirements that are indicated in the purchase order.Failure to comply with the general requirements of
4、 Specifica-tion A1025 constitutes nonconformance with this specification.In case of conflict between the requirements of this specifica-tion and Specification A1025, this specification shall prevail.4. Chemical Composition4.1 The material shall conform to the requirements as tochemical composition s
5、pecified in Tables 1 and 2.4.2 The manufacturer shall furnish an analysis of eachshipment showing the percentage of each element specified inTable 1. The manufacturer shall supply on request the results ofan analysis for the elements in Table 2, on a cumulative basisover a period mutually agreed upo
6、n between the manufacturerand the purchaser.5. Size5.1 The various grades are available in the sizes listed inTable 3.6. Keywords6.1 ferroalloy; ferrotungsten1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibili
7、ty of SubcommitteeA01.18 on Castings.Current edition approved Oct. 1, 2009. Published January 2010. Originallyapproved in 1932. Discontinued in 2000 and reinstated in 2002 as A144 - 02. Lastprevious edition approved in 2004 as A144 - 04. DOI: 10.1520/A0144-04R09.2For referenced ASTM standards, visit
8、 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-295
9、9, United States.ASTM International takes no position respecting the validity of any patent 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
10、 such rights, are entirely their own responsibility.This standard is subject to revision 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 a
11、dditional standardsand should be addressed to ASTM International Headquarters. Your comments 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
12、 the ASTM Committee on Standards, at the address shown below.This standard is copyrighted 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
13、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/).TABLE 1 Chemical RequirementsAGradeComposition, max
14、 %, Unless Otherwise ShownTungsten Carbon Phosphorus Sulfur Silicon Molybdenum AluminumA 85.095.0 0.050 0.010 0.020 0.10 0.20 0.10B 75.085.0 0.10 0.020 0.020 0.50 0.35 0.10C 75.085.0 0.60 0.060 0.050 1.0 1.0 .D 75.085.0 0.60 0.060 0.050 1.0 3.0 .AFor purposes of determining the tungsten content of
15、any shipment, tungsten shall be reported to the nearest 0.1 %.TABLE 2 Supplementary Chemical RequirementsAManganese Copper Nickel Arsenic Antimony Tin Bismuth Total: Arsenic,Antimony, TinTotal: ArsenicAntimony, Tin,BismuthA 0.10 0.50 0.05 0.010 0.010 0.010 0.010 . 0.040B 0.30 0.07 0.05 0.020 0.020 0
16、020 0.030 . 0.090C 0.75 0.10 . 0.10 0.080 0.10 . 0.20 .D 0.75 0.10 . 0.10 0.080 0.10 . 0.20 .AAn analysis of each lot is not required.TABLE 3 Size ToleranceSize Tolerance14 in. (6.3 mm) by down 5 % max retained on 6.3 mm (14 in.) sieve, 20 %max under 70 mesh38 in. (9.5 mm) by down 5 % max over 9.5 mm (38 in.) sieve, 20 % maxunder 70 meshA144 04 (2009)2
