1、Designation: A146 04 (Reapproved 2009)Standard Specification forMolybdenum Oxide Products1This standard is issued under the fixed designation A146; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、 in parentheses 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 molybdenumoxide, designated as A, B1, B2, and molybdic oxide briquets.1.2 The values stated in inch-
3、pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A1025 Specification for Ferroalloys and Other AlloyingMaterials, General
4、 Requirements3. General Conditions for Delivery3.1 Materials furnished to this specification shall conform tothe requirements of SpecificationA1025, including any supple-mentary requirements that are indicated in the purchase order.Failure to comply with the general requirements of Specifica-tion A1
5、025 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 Requirements4.1 The various grades shall conform to the requirements asto chemical composition specified in
6、 Table 1.4.2 The manufacturer shall furnish an analysis of eachshipment showing the percentage of each element specified.5. Sampling5.1 Sampling Small BagsWhen packed in the standard-ized small packages, each holding contained molybdenum, thematerial shall be sampled by selecting at random one twent
7、iethof the bags that may bear the same manufacturing lot number,and the combined content of these bags shall be reduced andanalyzed as a separate sample. When a shipment cannot bedivided by lot numbers, one twentieth of the total number ofbags constituting the shipment shall be selected and treated
8、asone sample. The material forming a sample shall be crushed ifnecessary, and in any event passed through a No. 10 (2.00-mm)sieve. The sample after sieving shall be thoroughly mixed byconing and then reduced to about 2 lb (0.9 kg) by quartering orby means of a riffle sampler. The reduced sample shal
9、l then becrushed and passed through a No. 60 (250-m) sieve. Thesample after sieving shall again be mixed by coning and thendivided through a riffle, preferably a Jones divider, into therequired number of analytical samples.5.2 Sampling Large ContainersWhen packed in drums orlarge bags or cartons, th
10、e material shall be sampled by selectingabout one twentieth of the content of each package that maybear the same manufacturing lot number, and the combinedmaterial selected shall be reduced and analyzed as a separatesample. When a shipment cannot be divided by lot numbers,about one twentieth of the
11、content of each package in theshipment shall be selected, and the combined material selectedshall be treated as one sample. The material comprising asample shall be thoroughly mixed by coning and reduced byhalf-shoveling, alternating the operations until the residualweight reaches about 40 lb (18.1
12、kg). Segregation of sizes shallbe carefully avoided. The sample thus reduced shall becrushed, if necessary, to pass through a No. 10 (2.00-mm)sieve, and the subsequent sampling procedure shall be asprescribed in 5.1 .5.3 Correcting Sample to Dry Net WeightAbsorption ofmoisture by the material would
13、depress the analytical percent-ages with respect to the dry basis, on which the product wasanalyzed when packaged. Accordingly, any analytical sampleshall be dried at 110C, before analysis, and the samplersmoist net weight of the shipment, of a manufacturing lot, or ofany constituent package shall b
14、e appropriately corrected to thecorresponding dry weight, thus leading to the proper weight ofcontained molybdenum.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.Curren
15、t edition approved Oct. 1, 2009. Published January 2010. Originallyapproved in 1932. Last previous edition approved in 2004 as A146 04. ReplacesA146 63 T. DOI: 10.1520/A0146-04R09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org
16、. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Chemical RequirementsMolybdenum OxideMolybdicOxide BriquetsGrade A Grade B1 Grade B2Molybdenum, min 55.0 57.0 57.0 51.6Sulfur, max 0.25 0.10 0.10 0.15Copper, max 1.0 1.0 0.1
17、5 0.151Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Keywords6.1 molybdenum; molybdenum oxideSUPPLEMENTARY REQUIREMENTSS1. The composition shall be further limited by the requirements of Table S1.1 in addition to thosein Table 1.
18、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 such rights, are
19、 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 additional standar
20、dsand 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 the ASTM Committ
21、ee 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 the aboveaddress
22、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 S1.1 Supplementary Chemical RequirementsComposition, %AMolybde
23、num OxideMolybdic OxideBriquetsGrade AGrade B1 andB2CarbonPhosphorus, maxtrace0.050trace0.05012.0 (approx)0.050AThe values shown are maxima. Upon request of the purchaser, the manufac-turer shall furnish an analysis for any of these elements on a cumulative basis overa period mutually agreed upon by the manufacturer and the purchaser. An analysisof each lot is not required.A146 04 (2009)2
