1、Designation:F2882M12Standard Specification forScrews,Alloy Steel,Heat Treated,1170 MPa MinimumTensile Strength Metric1This standard is issued under the fixed designation F2882M;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year
2、 of last revision.A number 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 the requirements for quenchedand tempered alloy steel screws 1.6 mm through 48 mm indiameter
3、having a minimum ultimate tensile strength of 1170MPa.NOTE1This specification is the metric companion of SpecificationF2882.1.2 The following hazard caveat pertains only to the testmethod portion,Section 10,of this specification:This standarddoes not purport to address all of the safety concerns,if
4、any,associated with its use.It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2.Referenced Documents2.1 ASTM Standards:2A751 Test Methods,Practices,and Terminology for Chemi-c
5、al Analysis of Steel ProductsE112 Test Methods for Determining Average Grain SizeF606M Test Methods for Determining the Mechanical Prop-erties of Externally and Internally Threaded Fasteners,Washers,and Rivets(Metric)F788/F788M Specification for Surface Discontinuities ofBolts,Screws,and Studs,Inch
6、and Metric SeriesF1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance InspectionF1940 Test Method for Process Control Verification toPrevent Hydrogen Embrittlement in Plated or CoatedFastenersF2282 Specification for QualityAssurance Requirements forCarbon and All
7、oy Steel Wire,Rods,and Bars for Me-chanical FastenersF2328M Test Method for Determining Decarburization andCarburization in Hardened and Tempered Threaded SteelBolts,Screws and Studs(Metric)2.2 ASME Standards:3B18.2.3.3M Metric Heavy Hex ScrewsB18.2.3.4M Metric Hex Flange ScrewsB18.2.3.5M Metric Hex
8、 BoltsB18.2.3.6M Metric Heavy Hex BoltsB18.2.3.9M Metric Heavy Hex Flange ScrewsB18.2.7.1M Metric 12-Spline Flange ScrewsB18.3.1M Metric Socket Head Cap ScrewsB18.3.6M Metric Series Socket Set ScrewsB18.24 Part Identifying Number(PIN)Code System Stan-dard for B18 Fastener Products3.Ordering Informat
9、ion3.1 Orders for high strength screws under this specificationshall include the following information:3.1.1 Quantity(number of screws),3.1.2 Dimensions,including nominal diameter,threaddesignation,thread,pitch,and nominal screw length(millimeters),3.1.3 Name of the screw including specification:3.1
10、.3.1 B18.2.3.3M Metric Heavy Hex Screw,3.1.3.2 B18.2.3.4M Metric Hex Flange Screw,3.1.3.3 B18.2.3.5M Metric Hex Bolts,3.1.3.4 B18.2.3.6M Metric Heavy Hex Bolts,3.1.3.5 B18.2.3.9M Metric Heavy Hex Flange Screws,3.1.3.6 B18.2.5M Metric 12 Point Flange Screws,3.1.3.7 B18.2.7.1M Metric 12-Spline Flange
11、Screws,3.1.3.8 B18.3.1M Metric Socket Head Cap Screws,3.1.3.9 B18.24 Part Identifying Number(PIN)Code SystemStandard for B18 Fastener Products,3.1.4 ASTM designation and year of issue.3.2 Orders for high strength screws may include the follow-ing optional requirements:3.2.1 Inspection at point of ma
12、nufacture.3.2.2 Coating,if required(see 4.6).3.2.3 Additional Testing(see 11.1).1This test method is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,Nuts,Rivets and Washers.Current edition approved Oct.1,2012.Published N
13、ovember 2012.DOI:10.1520/F2882M-12.2For 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.3Available from American Societ
14、y of Mechanical Engineers(ASME),ASMEInternational Headquarters,Three Park Ave.,New York,NY 10016-5990.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.4 Special Packaging(see 14.1.2).3.2.5 Supplementary Requirement(see S1).3.2.6 Specia
15、l Requirements.3.2.7 For establishment of a part identifying system,seeASME B18.24.4.Materials and Manufacture4.1 The screws shall be fabricated from steel made to finegrain practice and shall have an austenitic grain size of 5 orfiner.In the event of controversy over grain size,referee testson fini
16、shed screws conducted in accordance with Test MethodsE112 shall prevail.4.2 All socket set screws with diameters through M3.5 andany diameter with a length that achieves less than seven threadpitches may be rolled,cut,or ground.Set screws of M4 andlarger diameter and with more than seven thread pitches inlength shall have rolled threads.4.3 High strength screws shall be heat treated by quenchingin oil from above the transformation temperature and thentempered by reheating to at least 425C to wit
