1、Designation: A 980 97 (Reapproved 2003)Standard Specification forSteel, Sheet, Carbon, Ultra High Strength Cold Rolled1This standard is issued under the fixed designation A 980; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y
2、ear of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers a cold rolled ultra highstrength carbon steel sheet in coils or cut lengths. The pro
3、ductis available in four strength levels. The steels strength isobtained by water quenching from an austenitic temperatureresulting in a martensitic microstructure. This product isintended for miscellaneous applications where ultra highstrength, weight saving, and good weldability are important.2. R
4、eferenced Documents2.1 ASTM Standards:A 568/A 568M Specification for Steel, Sheet, Carbon, andHigh-Strength Low-Alloy, Hot-Rolled and Cold Rolled,General Requirements for23. Ordering Information3.1 It is the purchasers responsibility to specify in thepurchase order all ordering information necessary
5、 to purchasethe needed material. Examples of such information include, butare not limited to:3.1.1 ASTM specification number and year of issue,3.1.2 Name of material (cold rolled ultra high strength steelsheet),3.1.3 Grade (see Table 1),3.1.4 Specify oiled or not oiled as required,3.1.5 Dimensions (
6、thickness, width and whether cut lengthsor coils),3.1.6 Coil size (must include inside diameter, outside diam-eter and maximum mass),3.1.7 Quantity,3.1.8 Application (show part identification and description),3.1.9 Special Requirements (if required), and3.1.10 Cast or heat analysis report (request i
7、f required).4. Materials and Manufacture4.1 Melting PracticeThis sheet shall be produced fromaluminum killed steel.4.2 AnnealingThe material shall be continuous annealedto austenitic temperatures and water quenched.5. General Requirements5.1 Materials furnished under this specification shall con-for
8、m to the applicable requirements of the current edition ofSpecification A 568/A 568M unless otherwise provided herein.6. Chemical Composition6.1 The cast or heat analysis shall conform to the require-ments prescribed in Table 1 and Table 2.6.1.1 Each of the elements listed in Table 2 shall be includ
9、edin the report of the cast or heat analysis. Where the amount ofcopper nickel, chromium or molybdenum is less than 0.02 %,the analysis may be reported as 0.02 %. When the amount ofvanadium or columbium is less than 0.008 %, the analysis maybe reported as 0.008 %.7. Mechanical Properties7.1 Tension
10、Tests:7.1.1 RequirementsMaterials as represented by the testspecimen shall conform to the tensile requirements specified inTable 3.7.1.2 Number of TestsTwo tests shall be made from eachheat or from each lot of 50 tons. When the amount of finishedmaterial from a heat or lot is less than 50 tons, one
11、test shall bemade. When material rolled from one heat differs by 0.050 in.or more in thickness, one tension test shall be made from thethickest and thinnest material regardless of the weight repre-sented.7.1.3 Location and Orientation:7.1.3.1 Tension test specimens shall be taken at a pointimmediate
12、ly adjacent to the material to be qualified.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.19 on Steel Sheet and Strip.Current edition approved April 10, 2003. Published June 2003. Or
13、iginallyapproved in 1997. Last previous edition approved in 1997 as A 98097.2Annual Book of ASTM Standards, Vol 01.03.TABLE 1 Chemical RequirementsComposition - Weight % Heat AnalysisElement Grade130 160 190 220Carbon, max 0.10 0.15 0.23 0.28Manganese, max 0.60 0.60 0.60 0.60Phosphorus, max 0.030 0.
14、030 0.030 0.030Sulfur, max 0.035 0.035 0.035 0.035Aluminum, min 0.01 0.01 0.01 0.011Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.1.3.2 Tension test samples shall be taken from the fullthickness of the sheet as rolled.7.1.3.3 Tens
15、ion test specimens shall be taken from a loca-tion approximately halfway between the center of the sheet andthe edge of the material as-rolled.7.1.4 Retests:7.1.4.1 A retest shall be permitted if the results of anoriginal tension specimen are within 2 ksi of the requiredtensile strength.7.1.4.2 A re
16、test shall consist of one random specimen fromthe same heat or lot as the original specimen.7.1.4.3 If the results of the retest specimen meet the speci-fied requirements, the cast or test lot shall be accepted.8. Finish and Appearance8.1 Surface FinishThe sheet shall have a matte surfacetexture.8.2
17、 Oiling:8.2.1 Unless otherwise specified, the sheet shall be oiled.8.2.2 When required, the sheet may be specified to be notoiled (dry).8.3 EdgesThe sheet shall have cut edges.9. Certification and Reports9.1 When required by the purchase order, the producer shallfurnish the test results of the cast
18、or heat analysis or themechanical properties, or both. The report shall include thepurchase order number, ASTM designation number and yearissue, and cast or lot number correlating the test data with thematerial represented.10. Keywords10.1 carbon steel sheet; cold rolled steel sheet; steel sheet;ult
19、ra high-strengthASTM 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
20、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 reapproved or withdrawn. Your comments are invited either for revision of this standard or for ad
21、ditional 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. If you feel that your comments have not received a fair hearing you shouldmake your views known to
22、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 t
23、he 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 2 Limits on Unspecified ElementsElementAComposition Weight % Heat AnalysisCopperWhen specified, min .20When not specified, max .20Nickel, max 0.20Chromium, max 0.15Molybdenum, max 0.06Vanadium, max 0.008Columbium, max 0.008AMinimum copper added.TABLE 3 Mechanical RequirementsTensile StrengthGrade Min, ksi130 130160 160190 190220 220A 980 97 (2003)2
