1、Designation: A 144 04Standard Specification forFerrotungsten1This standard is issued under the fixed designation A 144; 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 parentheses indicates th
2、e year of last reapproval. Asuperscript epsilon (e) 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:2A 1025 Specification for Ferroalloys, General Require-ments3. General
3、Conditions for Delivery3.1 Materials furnished to this specification shall conform tothe requirements of Specification A 1025, including anysupplementary requirements that are indicated in the purchaseorder. Failure to comply with the general requirements ofSpecification A 1025 constitutes nonconfor
4、mance with thisspecification. In case of conflict between the requirements ofthis specification and Specification A 1025, this specificationshall prevail.4. Chemical Composition4.1 The material shall conform to the requirements as tochemical composition specified in Tables 1 and 2.4.2 The manufactur
5、er 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 upon between the manufacturerand the purchaser.5
6、. 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 responsibility of SubcommitteeA01.18 on Castings.Current
7、 edition approved Sept. 1, 2004. Published September 2004. Originallyapproved in 1932. Discontinued in 2000 and reinstated in 2002 as A 144 - 02. Lastprevious edition approved in 2002 as A 144 - 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service
8、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 19428-2959, United States.ASTM International takes no position respecting
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11、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 the ASTM Committee on Standards, at the address shown below.This
12、 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 the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax),
13、or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE 1 Chemical RequirementsAGradeComposition, max, %, 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.
14、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 any shipment, tungsten shall be reported to the nearest 0.1 %.TABLE 2 Supplementary Chemical RequirementsAManganese Copper Nickel Arsenic Antimony Tin Bismuth Total: Arsenic,Anti
15、mony, 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 0.020 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 meshA144042
