ASTM B92 B92M-2007 Standard Specification for Unalloyed Magnesium Ingot and Stick For Remelting《回熔用非合金镁锭和镁棒的标准规范》.pdf

1、Designation: B 92/B 92M 07Standard Specification forUnalloyed Magnesium Ingot and Stick For Remelting1This standard is issued under the fixed designation B 92/B 92M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last

2、revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers magnesium in t

3、he form ofingot and stick for remelting: 9980A is available in ingot andstick form, and 9980B, 9990A, 9995A, and 9998A are gener-ally available only in ingot form.1.2 The values stated in SI units are to be regarded as aseparate standard. The values stated in each system are notexact equivalents, th

4、erefore each system must be used inde-pendently of the other.2. Referenced Documents2.1 ASTM Standards:2B 951 Practice for Codification of Unalloyed Magnesiumand Magnesium-Alloys, Cast and WroughtE35 Test Methods for Chemical Analysis of Magnesiumand Magnesium AlloysE88 Practice for Sampling Nonferr

5、ous Metals and Alloysin Cast Form for Determination of Chemical Composition3. Terminology3.1 Definitions:3.1.1 ingota cast form suitable for remelting.3.1.2 stickan extruded form substantially uniform in crosssection cut to desired length or weight.4. Ordering Information4.1 Orders for ingot and sti

6、ck under this specification shallinclude the following information:4.1.1 Grade (Section 6 and Table 1),4.1.2 Quantity, in pieces or pounds kilograms, and4.1.3 Form; by agreement between the purchaser and themanufacturer the approximate form and weight of each pieceor ingot may be specified.4.1.4 For

7、 inch-pound orders specify B92, for metric ordersspecify B92M. Do not mix units.5. Materials and Manufacture5.1 No scrap shall be used in the production of magnesiumingot and stick, except such as shall accumulate at themanufacturers plants from material of similar composition andof his own manufact

8、ure.6. Chemical Composition6.1 LimitsThe material shall conform to the requirementsas to chemical composition prescribed in Table 1.6.2 Sampling:6.2.1 Sufficient samples shall be taken by the manufacturerto assure conformance to the chemical composition require-ments of the alloy. Samples may be tak

9、en from the moltenmetal when the ingot is poured or from the ingot. Samples shallbe representative of the material.6.2.2 In case of dispute, the sampling for chemical analysisshall be according to the requirements of Practice E88.Iftheingots are shipped in carload lots of the same alloy, not lesstha

10、n four ingots shall be taken at random from the carload forsampling. If the shipment is in less than carload lots, one ingotshall be taken for sampling for each 10 000 lb 4500 kg orfraction thereof.6.3 Methods of AnalysisAny suitable method of chemicalanalysis may be used. In case of dispute, the an

11、alysis shall bemade by methods given in Test Methods E35, or any otherstandard methods of analysis approved by ASTM unless someother method is agreed upon by the purchaser and vendor.7. General Quality7.1 Magnesium ingot and stick shall have a clean surfaceand shall be commercially free from dirt, s

12、lag, or other foreignmaterial.1This specification is under the jurisdiction of the ASTM Committee B07 onLight Metals and Alloys and is the direct responsibility of Subcommittee B07.04 onMagnesium Alloy Cast and Wrought Products.Current edition approved June 1, 2007. Published June 2007. Originallyap

13、proved in 1933. Last previous edition approved in 2001 as B 92/B 92M01.2For referenced ASTM standards, 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 AST

14、M website.1*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.8. Rejection8.1 Material that does not conform to the requirements ofthis specification may be rejected, and

15、if rejected the conditionsof replacement shall be as agreed upon between the purchaserand the seller. The sellers responsibility shall be limited to aperiod of six months from shipping date unless other agree-ment is made by the purchaser and seller.9. Packaging, Marking, and Shipping9.1 The materia

16、l shall be packaged in such a manner as toprevent damage in ordinary handling and transportation. Thetype of packaging and gross weight of individual containersshall be left to the discretion of the seller unless otherwiseagreed upon. Packaging methods and containers shall be soselected as to permit

17、 maximum utility of mechanical equip-ment in unloading and subsequent handling. Each package orcontainer shall contain only one size and form of material whenpacked for shipment unless otherwise agreed upon.9.2 Packages or containers shall be such as to ensureacceptance by common or other carriers f

18、or safe transportationat the lowest rate to the point of delivery.9.3 Each package or container shall be marked with thepurchase order number, form, quantity, specification number,gross and net weights, and the name of the manufacturer.10. Keywords10.1 chemical specifications; compositional limits;

19、contami-nants; contents; grades; magnesium; pure; unalloyedSUMMARY OF CHANGESB07 has identified the location of selected changes to this standard since the last issue (April 2001) that mayimpact the use of this standard. (Approved June 1, 2007)(1) Replaced B275 with new B951.TABLE 1 Chemical Require

20、mentsNOTE 1Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements issuspected or indicated in the course of routine analysis, further analysis shall be made to determine that the total of these other elements is not in

21、 excessof the limits specified in the last column of the table.NOTE 2The following applies to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated valueobtained from analysis should be rounded to the nearest unit in the last right-hand place

22、 of figures used in expressing the specified limit.Composition, %Grade9980A(UNS 19980)Grade9980B(UNS M 19991)Grade9990A(UNS 19990)Grade9995A(UNS 19995)Grade9998A(UNS 19998)Aluminum, max . . 0.003 0.01 0.004Copper, max 0.02 0.02 . . 0.0005Iron, max . . 0.04 0.003 0.002Lead, max 0.01 0.01 . . 0.001Man

23、ganese, max 0.10 0.10 0.004 0.004 0.002Nickel, max 0.001 0.005 0.001 0.001 0.0005Silicon, max . . 0.005 0.005 0.003Sodium, max 0.006 . . . .Tin, max 0.01 0.01 . . .Titanium, max . . . 0.01 0.001Other impurities each, maxA,B0.05 0.05 0.01C0.005C0.005CMagnesium, by difference, min 99.80 99.80 99.90 99

24、.95 99.98AFor specific applications, other minor impurities may be required to be controlled to limiting maxima by agreement between the purchaser and the seller.BIncludes elements for which no specific limit is shown.CFor nuclear applications, the cadmium and boron (high-capture cross-section eleme

25、nts) shall be specified as follows:Cadmium, max, % 0.0001 or 0.00005Boron, max, % 0.00007 or 0.00003B 92/B 92M 072ASTM 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 adv

26、ised 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 reviewed every five years andif not revised, either

27、 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 theresponsible technical committee, which you may attend. I

28、f 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 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).B 92/B 92M 073