1、Designation: A144 04 (Reapproved 2014)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, 2014. Published October 2014. Originallyapproved in 1932. Discontinued in 2000 and reinstated in 2002 as A144 - 02. Lastprevious edition approved in 2009 as A144 - 04(2009). DOI: 10.1520/A0144-04R14.2For referenced ASTM standards,
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14、 http:/ 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 75.085.0 0.60 0.060 0.050 1.0 1.0 .D 75.085.0 0.60 0.060 0.050 1.0 3.0
15、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,Antimony, TinTotal: ArsenicAntimony, Tin,BismuthA 0.10 0.50 0.05 0.010 0
16、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 meshA144 04 (2014)2
