1、Designation: F2882 12F2882/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;F2882/F2882M; the number immediately following the designation indicatesthe year o
2、f original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the requirements for quenched a
3、nd tempered alloy steel screws 0.060 through 112 inches in. and1.6 through 48 mm in diameter having a minimum ultimate tensile strength of 170 KSI.KSI or 1170 MPa.NOTE 1This specification is the inch companion of Specification F2882M.1.2 The values are stated in inch-pound units for inch fasteners a
4、nd SI metric units for metric fasteners. The values stated ineach system may not be exact equivalents; therefore each system shall be used independently of the other. Combining values fromthe two systems may result in non-conformance to the standard.1.3 The following hazard caveat pertains only to t
5、he test method portion, Section 10, of this specification: This standard doesnot purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standardto establish appropriate safety and health practices and determine the applicability o
6、f regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade
7、 Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsE112 Test Methods for Determining Average Grain SizeF606F606/F606M Test Methods for Determining the Mechanical Pro
8、perties of Externally and Internally Threaded Fasteners,Washers, and Rivets (Metric) F0606_F0606M Direct Tension Indicators, and RivetsF788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric SeriesF1470 Practice for Fastener Sampling for Specified Mechanical
9、 Properties and Performance InspectionF1940 Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated FastenersF2282 Specification for Quality Assurance Requirements for Carbon and Alloy Steel Wire, Rods, and Bars for MechanicalFastenersF2328 Test Method for
10、Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts,Screws, Studs, and NutsF2328M Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts,Screws, Studs, and Nuts (Metric)2.2 ASME Standards:3B18.2.1 Square and
11、 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 Hex Hex Flange Screws1 This test method is under the jurisdiction of ASTM Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.02 on
12、 Steel Bolts, Nuts, Rivetsand Washers.Current edition approved Oct. 1, 2012June 1, 2017. Published November 2012July 2017. Originally approved in 2012. Last previous edition approved in 2012 asF288212. DOI: 10.1520/F2882-12.10.1520/F2882_F2882M-17.2 For referencedASTM standards, visit theASTM websit
13、e, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave
14、., New York, NY 10016-5990.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends t
15、hat users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1B18.2.5 12 Point Flan
16、ge ScrewsB18.2.5M Metric 12 Point Flange ScrewsB18.2.7.1M Metric 12 Spline Flange ScrewsB18.3 Socket Cap, Shoulder, and Set Screws, Hex and Spline Keys (Inch Series)B18.3.1M Socket Head Cap Screws (Metric Series)B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products3. Or
17、dering Information3.1 Orders for high strength screws under this specification shall include the following information:3.1.1 Quantity (number of screws),3.1.2 Nominal dimensions, including diameter, thread designation, thread, pitch, and nominal screw length,3.1.3 Name of the screw including specifi
18、cation,3.1.3.1 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 Set Screws, 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
19、.3.6 ASME B18.2.3.5M, Metric Hex Bolts,3.1.3.7 ASME B18.2.3.9M, Metric Heavy Hex Flange Screws,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 Flange Screws,3.1.3.10 ASME B18.3.1M, Socket Head Cap Screws (Metric Series),3.1.4 ASTM designation and year o
20、f issue.3.2 Orders for high strength screws may include the following 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 Re
21、quirements.3.2.7 For establishment of a part identifying system, see ASME B18.24.4. Materials and Manufacture4.1 The screws shall be fabricated from steel made to fine grain practice and shall have an austenitic grain size of 5 or finer.In the event of controversy over grain size, referee tests on f
22、inished screws conducted in accordance with Test Methods E112 shallprevail.4.2 High strength screws shall be heat treated by quenching in oil from above the transformation temperature and then temperedby reheating to at least 797F or 425C to withinachieve the hardness rangemechanical properties spec
23、ified in Section 6 and Table1.4.2.1 The minimum tempering temperature may be verified by submitting screws to 777F or 415C for 30 min at temperature.The mean cross-section hardness of three readings on the screw before and after retempering shall not differ by more than 2 pointsHRC.4.3 Re-heat-treat
24、ment of screws for the purpose of carbon restoration is not permitted except for set screws.4.4 Unless otherwise specified, threads of screws shall be rolled for diameters through 0.625 in. or M20 and for screw lengthsthrough 1.5 in. 6 in. or 150 mm. For diameters and lengths other than this, thread
25、s may be rolled, cut, or ground with the exceptionof socket set screws. Set screws with thread diameters up to and including #5 or M 3.5, and all other diameters with lengths lessthan seven thread pitches may be rolled, cut, or ground. Thread diameters #6 or M4 and larger with a minimum of seven thr
26、eadpitches in length shall be rolled.4.5 Standard FinishesUnless otherwise specified, the screws shall be furnished with one of the following “standard surfacesas manufactured,” at the option of the manufacturer; (1) bright uncoated, (2) thermal black oxide, or (3) chemical black oxide.Hydrogen embr
27、ittlement tests shall not be required for screws furnished in these conditions.4.6 Protective Coatings:4.6.1 When a protective finish other than as specified in 4.5 is required, it shall be specified on the purchase order with theapplicable finish specification.4.6.2 When protective or decorative co
28、atings are applied to the screws, precautions specified by the coating requirements tominimize internal hydrogen embrittlement shall be exercised. When specified in the purchase order, testing shall be conducted inF2882/F2882M 172accordance with Test Methods F606F606/F606M or F1940. In the event tha
29、t hardness reductions occur in test specimens due tocoating curing times and temperatures, testing shall be conducted alternatively in accordance with Test Method F1624.5. Chemical Composition5.1 The screws shall be alloy steel conforming to the chemical composition specified in Table 2 and the requ
30、irements inSpecification F2282. See Supplementary Requirement S1 when additional alloy steel grades are required.5.2 One or more of the following alloying elements: chromium, nickel, molybdenum, or vanadium shall be present in sufficientquantity to ensure that the specified strength properties are m
31、et after oil quenching and tempering.As a guide for selecting material,an alloy steel should be capable of meeting the specified mechanical requirements if the “as oil quenched” core hardness onediameter from the point is equal to or exceeds 25 HRC + (55 carbon content).5.3 When product analyses are
32、 made by the purchaser from finished screws representing each lot, the chemical compositionshall conform to the requirements for product analysis in Table 2.5.4 Steel to which bismuth, selenium, tellurium, or lead has been intentionally added shall not be permitted for cold headedparts.5.5 Chemical
33、analyses shall be performed in accordance with Test Methods, Practices, and Terminology A751.6. Mechanical Properties6.1 Screws shall be tested in accordance with mechanical testing requirements specified in Table 3, and shall meet themechanical requirements in Table 1, and either Table 34 or, Table
34、 5 or Table 46.6.2 Screws other than set screws and flat countersink head screws in sizes 0.060 through 1The screws that are tested for 12 in.diameter shall be wedge tensile tested using wedge angles as wedge tensile strength shall utilize a wedge of the angle specifiedin Table 57.6.3 The hardness l
35、imits shall be met anywhere on the cross section through the threads, one diameter from the screw point.6.4 Mechanical properties shall be determined using Test Methods F606F606/F606M.7. Dimensions7.1 Unless otherwise specified, the product shall conform to the dimensional specification detailed in
36、the purchase order.TABLE 1 Mechanical RequirementsGrade 170 170Property Class11.9Full-size screws:Tensile or wedge strength, min, KSI 170Tensile or wedge strength, min, 170 KSIA 1170 MPaProof load (stress), min, KSI 135Proof load (stress), min, 135 KSI 930 MPaMachined test specimen:Yield strength at
37、 0.2 % offset, min,KSI153Yield strength at 0.2 % offset, 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 DPHA Not applicable to fasteners
38、with reduced loadability due to head configurationsuch as flat countersunk or button head screws. See Table 4 or Table 5 for full-sizetensile requirements.TABLE 2 Chemical RequirementsElement Composition, %Heat Analysis Product AnalysisCarbon 0.33 to 0.48 0.31 to 0.50Manganese, max 1.25 1.25Phosphor
39、us, max 0.035 0.040Sulfur, max 0.040 0.045Alloying elements See 5.2F2882/F2882M 1738. Workmanship, Finish, and Appearance8.1 There shall be no evidence of carburization or gross decarburization on the surfaces of the heat-treated screws whenmeasured in accordance with F2328. for inch products and F2
40、328M for metric products.8.2 The depth of partial decarburization shall be limited to the values in F2328 (Class 3 Product).Class 3 for inch products orF2328M Class 4 for metric products.8.3 The surface discontinuities for these products shall conform to Specification F788/F788M.9. Sampling and Numb
41、er of Tests9.1 Practice F1470 shall be used to determine the necessary sampling plan and the number of tests that must be performed todemonstrate that all of the requirements of this standard are met for each lot.10. Test Methods10.1 Conduct tests for proof load, wedge tensile, and ultimate tensile
42、strength in accordance with Test Method F606F606/F606M.10.2 Decarburization and carburization tests shall be conducted in accordance with Test Method F2328. for inch products andF2328M for metric products.10.3 Surface discontinuities including thread lap inspection shall be conducted in accordance w
43、ith Standard F788/F788M.11. Inspection11.1 If the additional tests described in 11.2 are required by the purchaser, it shall be specified in the inquiry, order, or contract.11.2 The inspector representing the purchaser, upon reasonable notice, shall have free entry to all parts of the manufacturersw
44、orks that concern the manufacture of the material ordered. The manufacturer shall afford the inspector all reasonable facilitiesto satisfy him that the material is being furnished in accordance with this specification. All tests and inspection required by thespecification that are requested by the p
45、urchasers representative shall be made before shipment, and shall be so conducted as notto interfere unnecessarily with the operation of the works.12. Product Marking12.1 All screws with nominal diameters of 0.2 in. or 5 mm and larger shall be permanently marked to identify the material grade,170 “1
46、70” for inch series or F2882“11.9” for metric and the manufacturers or private label distributors identification symbol.12.2 Material grade and manufacturers or private label distributors identification shall be separate and distinct. Marks shallpreferably be in different locations and, when on the
47、same level, shall be separated by a distinctive mark such as a forward orbackward slash, colon, dash, dot, or space.13. Responsibility13.1 The party responsible for the fastener shall be the organization that supplies the fastener to the purchaser.TABLE 3 Mechanical Testing RequirementsItem Nom. Dia
48、. ProductLength Hardness,max Hardness,minTest Conducted Using Full Size Product Test Conducted Using Machined Test SpecimenProof Load WedgeTensileStrengthAxialTensileStrengthYieldStrengthat 0.2%OffsetTensileStrengthElongation % Red. ofArea1 All shortlengthsLess than3DAB B . . . . . . .2 #1.0 in. orM
49、24Over 3DA B . ZC B . . . . .3 1.0 in. or M24and # M36Over 3DA B . ZC XC . YC YC YC YC4 M36 Over 3DA B . ZC . XC YC YC YC YC5D . Over 3DA B . . . XC . . . .A D denotes nominal diameter of product.B B Denotes mandatory test.C C Either all tests denoted by X or all tests denoted by Y 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.D Item 5 would include socket set screws and screws with reduced loadability due to head configurat
