1、Designation: A 146 04Standard Specification forMolybdenum Oxide Products1This standard is issued under the fixed designation A 146; 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
2、indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers four grades of molybdenumoxide, designated as A, B1, B2, and molybdic oxide briquets.1.2 The values stated in inch-pound units ar
3、e to be regardedas the standard.2. Referenced Documents2.1 ASTM Standards:2A 1025 Specification for Ferroalloys, General Require-ments3. General Conditions for Delivery3.1 Materials furnished to this specification shall conform tothe requirements of Specification A 1025, including anysupplementary r
4、equirements that are indicated in the purchaseorder. Failure to comply with the general requirements ofSpecification A 1025 constitutes nonconformance with thisspecification. In case of conflict between the requirements ofthis specification and Specification A 1025, this specificationshall prevail.4
5、. Chemical Requirements4.1 The various grades shall conform to the requirements asto chemical composition specified in 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
6、-ized small packages, each holding contained molybdenum, thematerial shall be sampled by selecting at random one twentiethof 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 bediv
7、ided by lot numbers, one twentieth of the total number ofbags constituting the shipment shall be selected and treated 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
8、byconing and then reduced to about 2 lb (0.9 kg) by quartering orby means of a riffle sampler. The reduced sample shall 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
9、therequired number of analytical samples.5.2 Sampling Large ContainersWhen packed in drums orlarge bags or cartons, the 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
10、reduced and analyzed as a separatesample. When a shipment cannot be divided by lot numbers,about one twentieth of the 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
11、by coning and reduced byhalf-shoveling, alternating the operations until the residualweight reaches about 40 lb (18.1 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 proce
12、dure shall be asprescribed in 5.1 .5.3 Correcting Sample to Dry Net WeightAbsorption ofmoisture by the material would 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 an
13、alysis, and the samplersmoist net weight of the shipment, of a manufacturing lot, or ofany constituent package shall be appropriately corrected to thecorresponding dry weight, thus leading to the proper weight ofcontained molybdenum.1This specification is under the jurisdiction of ASTM Committee A01
14、 on Steel,Stainless Steel, and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved May 1, 2004. Published May 2004. Originallyapproved in 1932. Last previous edition approved in 1964 as A 146 64 (2000).Replaces A 146 63 T.2For referenced ASTM st
15、andards, visit 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.TABLE 1 Chemical RequirementsMolybdenum OxideMolybdicOxide BriquetsGrade A Grade B1
16、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 0.15 0.151*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Keywords6.1 m
17、olybdenum; molybdenum oxideSUPPLEMENTARY REQUIREMENTSS1. The composition shall be further limited by the requirements of Table S1.1 in addition to thosein Table 1.SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last version(A 146 64 (2000) t
18、hat may impact the use of this standard.(1) Practice E 29, and Test Methods E 31 were removed from2.(2) Specification A 1025 was added to 2.(3) Changed Ordering Information to General Conditions forDelivery.(4) Revised Section 4.(5) Removed sections on Size, Chemical Analysis, Inspection,Rejection,
19、Marking, and Packaging.(6) Changed Grade B to Grade B1 and added Grade B2 toTable 1.(7) Added Supplementary Requirements section.(8) Changed Table 2 to Table S1.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this s
20、tandard. 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 committee and must be re
21、viewed 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 at a meeting of therespons
22、ible 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 Drive, PO Box C700, West
23、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.astm.org).TABLE S1.1 Supplem
24、entary Chemical RequirementsComposition, %AMolybdenum 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.A146042
