1、Designation: F2882/F2882M 17Standard Specification forScrews, Alloy Steel, Heat Treated, 170 ksi and 1170 MPaMinimum Tensile Strength (Inch and Metric)1This standard is issued under the fixed designation F2882/F2882M; the number immediately following the designation indicates the yearof original ado
2、ption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the requirements for quenchedand tempered all
3、oy steel screws 0.060 through 112 in. and 1.6through 48 mm in diameter having a minimum ultimate tensilestrength of 170 KSI or 1170 MPa.1.2 The values are stated in inch-pound units for inchfasteners and SI metric units for metric fasteners. The valuesstated in each system may not be exact equivalen
4、ts; thereforeeach system shall be used independently of the other. Combin-ing values from the two systems may result in non-conformance to the standard.1.3 The following hazard caveat pertains only to the testmethod portion, Section 10, of this specification: This standarddoes not purport to address
5、 all of the safety concerns, if 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.1.4 This international standard was developed in accor-dance wit
6、h internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards
7、:2A751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsE112 Test Methods for Determining Average Grain SizeF606/F606M Test Methods for Determining the MechanicalProperties of Externally and Internally ThreadedFasteners, Washers, Direct Tension Indicators, and RivetsF
8、788/F788M Specification for Surface Discontinuities ofBolts, Screws, and Studs, Inch 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 C
9、oatedFastenersF2282 Specification for QualityAssurance Requirements forCarbon and Alloy Steel Wire, Rods, and Bars for Me-chanical FastenersF2328 Test Method for Determining Decarburization andCarburization in Hardened and Tempered Threaded SteelBolts, Screws, Studs, and NutsF2328M Test Method for D
10、etermining Decarburization andCarburization in Hardened and Tempered Threaded SteelBolts, Screws, Studs, and Nuts (Metric)2.2 ASME Standards:3B18.2.1 Square and Hex Bolts and ScrewsB18.2.3.3M Metric Heavy Hex ScrewsB18.2.3.4M Metric Hex Flange ScrewsB18.2.3.5M Metric Hex BoltsB18.2.3.9M Metric Heavy
11、 Hex Hex Flange ScrewsB18.2.5 12 Point Flange ScrewsB18.2.5M Metric 12 Point Flange ScrewsB18.2.7.1M Metric 12 Spline Flange ScrewsB18.3 Socket Cap, Shoulder, and Set Screws, Hex andSpline Keys (Inch Series)B18.3.1M Socket Head Cap Screws (Metric Series)B18.24 Part Identifying Number (PIN) Code Syst
12、em Stan-dard for B18 Fastener Products3. Ordering Information3.1 Orders for high strength screws under this specificationshall include the following information:3.1.1 Quantity (number of screws),3.1.2 Nominal dimensions, including diameter, threaddesignation, thread, pitch, and nominal screw length,
13、3.1.3 Name of the screw including specification,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 June 1, 2017. Published July 2017. Originally approve
14、din 2012. Last previous edition approved in 2012 as F288212. DOI: 10.1520/F2882_F2882M-17.2For 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 Sum
15、mary page onthe ASTM website.3Available from American Society 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 StatesThis international s
16、tandard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.13.
17、1.3.1 ASME B18.2.1, Square and Hex Bolts and Screws,3.1.3.2 ASME B18.2.5, 12 Point Flange Screws,3.1.3.3 ASME B18.3, Socket Cap, Shoulder, and SetScrews, Hex and Spline Keys (Inch Series),3.1.3.4 ASME B18.2.3.3M, Metric Heavy Hex Screws,3.1.3.5 ASME B18.2.3.4M, Metric Hex Flange Screws,3.1.3.6 ASME
18、B18.2.3.5M, Metric Hex Bolts,3.1.3.7 ASME B18.2.3.9M, Metric Heavy Hex FlangeScrews,3.1.3.8 ASME B18.2.5M, Metric 12 Point Flange Screws,3.1.3.9 ASME B18.2.7.1M, Metric 12-Spline FlangeScrews,3.1.3.10 ASME B18.3.1M, Socket Head Cap Screws (Met-ric Series),3.1.4 ASTM designation and year of issue.3.2
19、 Orders for high strength screws may include the follow-ing optional requirements:3.2.1 Inspection at point of manufacture.3.2.2 Coating, if required (see 4.6).3.2.3 Additional Testing (see 11.1).3.2.4 Special Packaging (see 14.1.2).3.2.5 Supplementary Requirement (see S1).3.2.6 Special Requirements
20、.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 finished screw
21、s conducted in accordance with Test MethodsE112 shall prevail.4.2 High strength screws shall be heat treated by quenchingin oil from above the transformation temperature and thentempered by reheating to at least 797F or 425C to achieve themechanical properties specified in Section 6 and Table 1.4.2.
22、1 The minimum tempering temperature may be verifiedby submitting screws to 777F or 415C for 30 min attemperature. The mean cross-section hardness of three read-ings on the screw before and after retempering shall not differby more than 2 points HRC.4.3 Re-heat-treatment of screws for the purpose of
23、carbonrestoration is not permitted except for set screws.4.4 Unless otherwise specified, threads of screws shall berolled for diameters through 0.625 in. or M20 and for screwlengths through 6 in. or 150 mm. For diameters and lengthsother than this, threads may be rolled, cut, or ground with theexcep
24、tion of socket set screws. Set screws with thread diam-eters up to and including #5 or M 3.5, and all other diameterswith lengths less than seven thread pitches may be rolled, cut,or ground. Thread diameters #6 or M4 and larger with aminimum of seven thread pitches in length shall be rolled.4.5 Stan
25、dard FinishesUnless otherwise specified, thescrews shall be furnished with one of the following “standardsurfaces as manufactured,” at the option of the manufacturer;(1) bright uncoated, (2) thermal black oxide, or (3) chemicalblack oxide. Hydrogen embrittlement tests shall not be re-quired for scre
26、ws furnished in these conditions.4.6 Protective Coatings:4.6.1 When a protective finish other than as specified in 4.5is required, it shall be specified on the purchase order with theapplicable finish specification.4.6.2 When protective or decorative coatings are applied tothe screws, precautions sp
27、ecified by the coating requirementsto minimize internal hydrogen embrittlement shall be exer-cised. When specified in the purchase order, testing shall beconducted in accordance with Test Methods F606/F606M orF1940. In the event that hardness reductions occur in testspecimens due to coating curing t
28、imes and temperatures,testing shall be conducted alternatively in accordance with TestMethod F1624.5. Chemical Composition5.1 The screws shall be alloy steel conforming to thechemical composition specified in Table 2 and the require-ments in Specification F2282. See Supplementary RequirementS1 when
29、additional alloy steel grades are required.5.2 One or more of the following alloying elements:chromium, nickel, molybdenum, or vanadium shall be presentin sufficient quantity to ensure that the specified strengthproperties are met after oil quenching and tempering. As aguide for selecting material,
30、an alloy steel should be capable ofmeeting the specified mechanical requirements if the “as oilquenched” core hardness one diameter from the point is equalto or exceeds 25 HRC + (55 carbon content).5.3 When product analyses are made by the purchaser fromfinished screws representing each lot, the che
31、mical composi-tion shall conform to the requirements for product analysis inTable 2.TABLE 1 Mechanical RequirementsGrade 170 Property Class 11.9Full-size screws:Tensile or wedge strength, min, 170 KSIA1170 MPaProof load (stress), min, 135 KSI 930 MPaMachined test specimen:Yield strength at 0.2 % off
32、set, min, 153 KSI 1055 MPaTensile strength, min, KSI 170 KSI 1170 MPaElongation in 5D, min, % 10 10Reduction of area, min, % 35 35Product hardness:Rockwell 37 to 42 HRC 37 to 42 HRCVickers 372 to 434 DPH 372 to 434 DPHANot applicable to fasteners with reduced loadability due to head configurationsuc
33、h as flat countersunk or button head screws. See Table 4 or Table 5 for full-sizetensile requirements.TABLE 2 Chemical RequirementsElementComposition, %Heat Analysis Product AnalysisCarbon 0.33 to 0.48 0.31 to 0.50Manganese, max 1.25 1.25Phosphorus, max 0.035 0.040Sulfur, max 0.040 0.045Alloying ele
34、ments See 5.2F2882/F2882M 1725.4 Steel to which bismuth, selenium, tellurium, or lead hasbeen intentionally added shall not be permitted for cold headedparts.5.5 Chemical analyses shall be performed in accordancewith Test Methods, Practices, and Terminology A751.6. Mechanical Properties6.1 Screws sh
35、all be tested in accordance with mechanicaltesting requirements specified in Table 3, and shall meet themechanical requirements in Table 1, and either Table 4, Table5 or Table 6.6.2 The screws that are tested for wedge tensile strengthshall utilize a wedge of the angle specified in Table 7.6.3 The h
36、ardness limits shall be met anywhere on the crosssection through the threads, one diameter from the screw point.6.4 Mechanical properties shall be determined using TestMethods F606/F606M.7. Dimensions7.1 Unless otherwise specified, the product shall conform tothe dimensional specification detailed i
37、n the purchase order.8. Workmanship, Finish, and Appearance8.1 There shall be no evidence of carburization or grossdecarburization on the surfaces of the heat-treated screws whenmeasured in accordance with F2328 for inch products andF2328M for metric products.8.2 The depth of partial decarburization
38、 shall be limited toF2328 Class 3 for inch products or F2328M Class 4 for metricproducts.8.3 The surface discontinuities for these products shallconform to Specification F788/F788M.9. Sampling and Number of Tests9.1 Practice F1470 shall be used to determine the necessarysampling plan and the number
39、of tests that must be performedto demonstrate that all of the requirements of this standard aremet for each lot.10. Test Methods10.1 Conduct tests for proof load, wedge tensile, andultimate tensile strength in accordance with Test MethodF606/F606M.10.2 Decarburization and carburization tests shall b
40、e con-ducted in accordance with Test Method F2328 for inchproducts and F2328M for metric products.10.3 Surface discontinuities including thread lap inspectionshall be conducted in accordance with Standard F788/F788M.11. Inspection11.1 If the additional tests described in 11.2 are required bythe purc
41、haser, it shall be specified in the inquiry, order, orcontract.11.2 The inspector representing the purchaser, upon reason-able notice, shall have free entry to all parts of the manufac-turers works that concern the manufacture of the materialordered. The manufacturer shall afford the inspector all r
42、ea-sonable facilities to satisfy him that the material is beingfurnished in accordance with this specification. All tests andinspection required by the specification that are requested bythe purchasers representative shall be made before shipment,and shall be so conducted as not to interfere unneces
43、sarily withthe operation of the works.12. Product Marking12.1 All screws with nominal diameters of 0.2 in. or 5 mmand larger shall be permanently marked to identify the materialgrade, “170” for inch series or “11.9” for metric and themanufacturers or private label distributors identification sym-bol
44、.12.2 Material grade and manufacturers or private labeldistributors identification shall be separate and distinct. Marksshall preferably be in different locations and, when on the samelevel, shall be separated by a distinctive mark such as a forwardor backward slash, colon, dash, dot, or space.TABLE
45、 3 Mechanical Testing RequirementsItem Nom. Dia.ProductLengthHardness,maxHardness,minTest Conducted Using Full Size Product Test Conducted Using Machined Test SpecimenProof Load WedgeTensileStrengthAxialTensileStrengthYieldStrengthat 0.2%OffsetTensileStrengthElongation % Red. ofArea1 All shortlength
46、sLess than3DABB. . . . . . .2 #1.0 in. orM24Over 3DAB. ZCB. . . . .3 1.0 in. or M24and # M36Over 3DAB. ZCXC. YCYCYCYC4 M36 Over 3DAB. ZC. XCYCYCYCYC5D. Over 3DAB. . . XC. . . .AD denotes nominal diameter of product.BB Denotes mandatory test.CC Either all tests denoted by X or all tests denoted by Y
47、shall be performed. In case of arbitration full-size tests, denoted X, shall be decisive. Proof load test denotedZ shall be conducted when purchaser requests the test in inquiry and order.DItem 5 would include socket set screws and screws with reduced loadability due to head configuration such as fl
48、at countersunk or button head screws.F2882/F2882M 17313. Responsibility13.1 The party responsible for the fastener shall be theorganization that supplies the fastener to the purchaser.14. Packaging and Package Marking14.1 Packaging:14.1.1 Unless otherwise specified, product shall be pack-aged accord
49、ing to the manufacturers practice to preventdamage before and during shipment.14.1.2 When special packaging requirements are required,they shall be defined at the time of the inquiry and order.14.2 Package Marking:14.2.1 Unless otherwise agreed between the purchaser andsupplier, the container shall be marked to permit identificationof the lot. Each shipping unit shall also include or be plainlymarked with the following information:14.2.1.1 ASTM designation,14.2.1.2 Size,14.2.1.3 Name and brand or tra
