ASTM A711 A711M-2007(2012) Standard Specification for Steel Forging Stock 《钢锻件坯料标准规格》.pdf
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1、Designation: A711/A711M 07 (Reapproved 2012)Standard Specification forSteel Forging Stock1This standard is issued under the fixed designation A711/A711M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A
2、number in parentheses indicates the year of last reapproval.A superscript epsilon () 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. Scope1.1 This specification covers cast carbon and alloy steeli
3、ngots and strand castings, semi-wrought ingots and strandcastings and rolled or forged blooms, billets, and slabs forforging.1.2 Blooms, billets, and slabs are semi-finished steel prod-ucts, hot rolled or forged to approximate cross-sectionaldimensions. Blooms and billets may be square, round, octag
4、o-nal, or rectangular in section; slabs are rectangular. Althoughno invariable rule prevails between the terms blooms andbillets, and they are frequently used interchangeably, thefollowing size distinctions are in general use.1.2.1 BloomsCross-sectional area greater than 36 in.2230 cm2.1.2.2 Billets
5、Maximum cross-sectional area 36 in.2230 cm2.1.2.3 SlabsMinimum thickness, 112 in. 4 cm; width,more than twice the thickness; and generally a cross-sectionalarea of not less than 16 in.2100 cm2.1.2.4 Ingots either top or bottom poured or secondaryremelted are covered.1.2.5 Strand castings with or wit
6、hout additional reductionare covered.1.3 Supplementary requirements (S1 to S19) of an optionalnature are provided. They shall apply only when specified bythe purchaser.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach syst
7、em may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.5 Unless the order specifies the “M” specification, thematerial shall be furnished to the inch-pound units.2. Referen
8、ced Documents2.1 ASTM Standards:2A29/A29M Specification for Steel Bars, Carbon and Alloy,Hot-Wrought, General Requirements forA275/A275M Practice for Magnetic Particle Examinationof Steel ForgingsA388/A388M Practice for Ultrasonic Examination of SteelForgingsA788/A788M Specification for Steel Forgin
9、gs, General Re-quirementsE45 Test Methods for Determining the Inclusion Content ofSteelE112 Test Methods for Determining Average Grain SizeE381 Method of Macroetch Testing Steel Bars, Billets,Blooms, and Forgings3. Ordering Information and General Requirements3.1 When this specification is to be app
10、lied to an inquiry,contract, or order, the purchaser shall furnish the followinginformation in addition to those specified in SpecificationA788/A788M:3.1.1 The grade of material desired.3.1.2 Product form restrictions (for example, ingots, strandcastings, billets) if any, and3.1.3 Applicable supplem
11、entary requirements.3.1.4 Surface condition.3.2 Material supplied to this specification shall conform tothe requirements of Specification A788/A788M, which out-lines additional ordering information, manufacturing require-ments, testing and retsting methods and procedures, marking,certification, prod
12、uct analysis variations, and additional supple-mentary requirements.3.2.1 If the requirements of this specification are in conflictwith the requirements of Specification A788/A788M, therequirements of this specification shall prevail.1This specification is under the jurisdiction of ASTM Committee A0
13、1 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.06 on Steel Forgings and Billets.Current edition approved May 1, 2012. Published May 2012. Originallyapproved in 1974. Last previous edition approved in 2007 as A711/A711M 07.DOI: 10.1520/A0711_A0711M-0
14、7R12.2For 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 ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO
15、 Box C700, West Conshohocken, PA 19428-2959, United States.4. Materials and Manufacture4.1 DiscardSufficient discard shall be made to securefreedom from piping and undue segregation.4.2 Reduction from IngotExcept as otherwise agreed inaccordance with Supplementary Requirement S3.2, the mate-rial sha
16、ll be made from product having at least two times thecross-sectional area of the material.4.3 StabilityMaterial shall be furnished in a condition towithstand, for an indefinite time, exposure to all climaticconditions without developing any external or internal cracks.The method of cooling or of tre
17、atment before shipment shall beoptional with the manufacturer, but he shall be responsible (inthe same manner as for defects disclosed after delivery) forcracks that may develop before material is subjected toreheating. When specific stability treatment of material isspecified by the purchaser, the
18、manufacturer shall be respon-sible only for carrying out those specific operations but shallnot be responsible for cracks that may develop before materialis subjected to reheating.5. Chemical Composition5.1 The chemical composition shall conform to the require-ments specified in the purchase order o
19、r the individual productspecification. For convenience the grades commonly specifiedfor carbon and alloy steel, blooms, billets, or slabs are shownin Table 1 and Table 2 of the latest issue of SpecificationA29/A29M. Blooms, billets, or slabs may be ordered to thesegrade designations, and when so ord
20、ered shall conform to thespecified limits by heat analysis.5.2 Heat Analysis:5.2.1 An analysis of each heat of steel shall be made inaccordance with Specification A788/A788M.5.3 Product Analysis:5.3.1 A product analysis may be made by the purchaser inaccordance with Specification A788/A788M.5.3.2 To
21、 indicate adequately the composition of a heat orlot, samples selected to represent the heat as fairly as possibleshall be taken midway between center and outside of thematerial from a minimum number of pieces as follows:Lots Number of Pieces15 tons 13.5 t or less 4Over 15 tons 13.5 t 65.3.3 If the
22、number of pieces from cast or heat is less thanthe number of samples specified in 5.3.2, one sample shall betaken from each piece.5.3.4 When chips are taken by drilling, the approximatediameter of the drill used shall be as follows:Area of Cross Section to Be Sampled,in.2cm2Approximate Drill Diamete
23、r,in. mm16 100 and under12 13Over 16 100 1 256. Permissible Variations6.1 The permissible variation from the specified or theoreti-cal weight of blooms, billets, and slabs shall be 65 % forindividual pieces or for lots of less than a carload. For carloadlots the permissible variation shall be 62.5 %
24、 of the totalweight of the lot.7. Workmanship, Finish, and Appearance7.1 The material shall be free of injurious imperfections.7.2 Conditioning, cutting, or parting of material may bedone by scarfing or flame-cutting when methods involvingpreheating and temperature control necessary to avoid anydama
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