1、Designation: F2882 12Standard Specification forScrews, Alloy Steel, Heat Treated, 170 ksi Minimum TensileStrength1This standard is issued under the fixed designation F2882; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f 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 0.060 through 112 inches indi
3、ameter having a minimum ultimate tensile strength of 170KSI.NOTE 1This specification is the inch companion of SpecificationF2882M.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 con
4、cerns, 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.2. Referenced Documents2.1 ASTM Standards:2A751 Test Methods, Practices, and Terminolo
5、gy for Chemi-cal Analysis of Steel ProductsE112 Test Methods for Determining Average Grain SizeF606 Test Methods for Determining the Mechanical Proper-ties of Externally and Internally Threaded Fasteners,Washers, Direct Tension Indicators, and RivetsF788/F788M Specification for Surface Discontinuiti
6、es 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 CoatedFastenersF2282 Specification for QualityAssu
7、rance 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 and Studs2.2 ASME Standards:3B18.2.1 Square and Hex Bolts and ScrewsB18.2.5 12 Point Flan
8、ge ScrewsB18.3 Socket Cap, Shoulder, and Set Screws, Hex andSpline Keys (Inch Series)B18.24 Part Identifying Number (PIN) Code System Stan-dard for B18 Fastener Products3. Ordering Information3.1 Orders for high strength screws under this specificationshall include the following information:3.1.1 Qu
9、antity (number of screws),3.1.2 Nominal dimensions, including diameter, threaddesignation, thread, pitch, and nominal screw length,3.1.3 Name of the screw including specification,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, So
10、cket Cap, Shoulder, and SetScrews, Hex and Spline Keys (Inch Series),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 manufacture.3.2.2 Coating, if required (see 4.6).3.2.3 Additional Testing (s
11、ee 11.1).3.2.4 Special Packaging (see 14.1.2).3.2.5 Supplementary Requirement (see S1).3.2.6 Special 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 a
12、n austenitic grain size of 5 orfiner. In the event of controversy over grain size, referee testson finished screws conducted in accordance with Test MethodsE112 shall prevail.1This test method is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommitte
13、e F16.02 on Steel Bolts,Nuts, Rivets and Washers.Current edition approved Oct. 1, 2012. Published November 2012. DOI:10.1520/F2882-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume info
14、rmation, refer to the standards Document Summary 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 1
15、9428-2959. United States14.2 High strength screws shall be heat treated by quenchingin oil from above the transformation temperature and thentempered by reheating to at least 797F to within the hardnessrange specified in Table 1.4.2.1 The minimum tempering temperature may be verifiedby submitting sc
16、rews to 777F for 30 min at temperature. Themean cross-section hardness of three readings on the screwbefore and after retempering shall not differ by more than 2points HRC.4.3 Re-heat-treatment of screws for the purpose of carbonrestoration is not permitted except for set screws.4.4 Unless otherwise
17、 specified, threads of screws shall berolled for diameters through 0.625 in. and for screw lengthsthrough 1.5 in. For diameters and lengths other than this,threads may be rolled, cut, or ground with the exception ofsocket set screws. Set screws with thread diameters up to andincluding #5 and all oth
18、er diameters with lengths less thanseven thread pitches may be rolled, cut, or ground. Threaddiameters #6 and larger with a minimum of seven threadpitches in length shall be rolled.4.5 Standard FinishesUnless otherwise specified, thescrews shall be furnished with one of the following “standardsurfac
19、es 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 screws furnished in these conditions.4.6 Protective Coatings:4.6.1 When a protective finish other than as specified
20、 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 specified by the coating requirementsto minimize internal hydrogen embrittlement shall be exer-cised. When specif
21、ied in the purchase order, testing shall beconducted in accordance with Test Methods F606 or F1940.Inthe event that hardness reductions occur in test specimens dueto coating curing times and temperatures, testing shall beconducted alternatively in accordance with Test MethodF1624.5. Chemical Composi
22、tion5.1 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 additional alloy steel grades are required.5.2 One or more of the following alloying elements:chromium, nickel, molybd
23、enum, 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, an alloy steel should be capable ofmeeting the specified mechanical requirements if the “as oilquenched” core hardness
24、 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 chemical composi-tion shall conform to the requirements for product analysis inTable 2.5.4 Steel to which bismuth, seleni
25、um, 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 shall be tested meet the mechanical require-ments in Table 1, and
26、 Table 3 or Table 4.6.2 Screws other than set screws and flat countersink headscrews in sizes 0.060 through 112 in. diameter shall be wedgetensile tested using wedge angles as specified in Table 5.6.3 The hardness limits shall be met anywhere on the crosssection through the threads, one diameter fro
27、m the screw point.6.4 Mechanical properties shall be determined using TestMethods F606.7. Dimensions7.1 Unless otherwise specified, the product shall conform tothe dimensional specification detailed in the purchase order.8. Workmanship, Finish, and Appearance8.1 There shall be no evidence of carburi
28、zation or grossdecarburization on the surfaces of the heat-treated screws whenmeasured in accordance with F2328.8.2 The depth of partial decarburization shall be limited tothe values in F2328 (Class 3 Product).8.3 The surface discontinuities for these products shallconform to Specification F788/F788
29、M.TABLE 1 Mechanical RequirementsGrade 170Full-size screws:Tensile or wedge strength, min, KSI 170Proof load (stress), min, KSI 135Machined test specimen:Yield strength at 0.2 % offset, min, KSI 153Tensile strength, min, KSI 170Elongation in 5D, min, % 10Reduction of area, min, % 35Product hardness:
30、Rockwell 37 to 42 HRCVickers 372 to 434 DPHTABLE 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 elements See 5.2F2882 1229. Sampling and Number of Tests9.1 Pr
31、actice F1470 shall be used to determine the necessarysampling plan and the number 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 accordan
32、ce with Test Method F606.10.2 Decarburization and carburization tests shall be con-ducted in accordance with Test Method F2328.10.3 Surface discontinuities including thread lap inspectionshall be conducted in accordance with Standard F788/F788M.11. Inspection11.1 If the additional tests described in
33、 11.2 are required bythe purchaser, 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 sha
34、ll afford the inspector all rea-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 conducte
35、d as not to interfere unnecessarily withthe operation of the works.12. Product Marking12.1 All screws with nominal diameters of 0.2 in. and largershall be permanently marked to identify the material grade, 170or F2882 and the manufacturers or private label distributorsidentification symbol.12.2 Mate
36、rial grade and manufacturers or private labeldistributors identification shall be separate and distinct. MarksTABLE 3 Tensile Requirements for Coarse Thread ScrewsScrewDia (D),in.Threads,in.TensileLoad,min, lbfStressArea,in.2AProof Load(LengthMeasurementMethod),min, lbf0.073 64 447 0.00263 3550.086
37、56 629 0.00370 5000.099 48 828 0.00487 6570.112 40 1 029 0.00604 8150.125 40 1 351 0.00796 1,0750.138 32 1 549 0.00909 1,2270.164 32 2 380 0.0140 1 8900.190 24 2 975 0.0175 2 3630.250 20 5 412 0.0318 4,2930.3125 18 8 916 0.0524 7,0740.375 16 13 128 0.0775 10,4630.4375 14 18 039 0.1063 14,3510.500 13
38、 24 083 0.1419 19,1570.625 11 38 400 0.226 30 5000.750 10 56 800 0.334 45 1000.875 9 78 500 0.462 62 4001.000 8 103 000 0.606 81 8001.125 7 129 000 0.763 103 0001.250 7 165 000 0.969 131 0001.375 6 196 000 01.155 156 0001.500 6 239 000 01.405 190 0001.750 5 323 000 01.90 256 0002.000 412 425 000 2.5
39、0 338 0002.250 412 552 000 3.25 439 0002.500 4 680 000 4.00 540 0002.750 4 838 000 4.93 666 0003.000 4 1 010 000 5.97 806 0003.250 4 1 210 000 7.10 958 0003.500 4 1 420 000 8.33 1 120 0003.750 4 1 640 000 9.66 1 300 0004.000 4 1 880 000 11.08 1 500 000AStress areas based on Handbook H-28 (U.S. Depar
40、tment of Commerce) asfollows:As5 0.7854D 2 (0.9743n)2where:As= stress area,D = nominal screw size, andn = threads/in.TABLE 4 Tensile Requirements for Fine Thread ScrewsScrewDia (D),in.Threads,in.TensileLoad,min, lbfStressArea,in.2AProof Load(LengthMeasurementMethod),min, lbf0.060 80 306 0.00180 2430
41、.073 72 472 0.00278 3750.086 64 670 0.00394 5320.099 56 889 0.00523 7060.112 48 1124 0.00661 8920.125 44 1407 0.00830 1 1190.138 40 1728 0.01015 1 3690.164 36 2503 0.01474 1 9860.190 32 3400 0.0200 2 7000.250 28 6139 0.0364 4 9180.3125 24 9822 0.0580 7 8300.375 24 14922 0.0878 11 8610.4375 20 20211
42、0.1187 16 0070.500 20 27200 0.1599 21 6000.625 18 43 500 0.256 34 6000.750 16 63 400 0.373 50 4000.875 14 86 500 0.509 68 7001.000 12 113 000 0.663 89 5001.125 12 146 000 0.856 116 0001.250 12 182 000 1.073 145 0001.375 12 224 000 1.315 178 0001.500 12 269 000 1.581 213 000AStress areas based on Han
43、dbook H-28 (U.S. Department of Commerce) asfollows:As5 0.7854D 2 (0.9743n)2where:As= stress area,D = nominal screw size, andn = threads/in.TABLE 5 Wedge Test AnglesScrewDia (D),in.Wedge Angle, DegBody Lengths2D or Lessor Threadedto the HeadBody LengthsGreater than2D0.112 0.500, inclusive 6 100.625 0
44、.750, inclusive 6 80.875 to 1.500, inclusive 4 6F2882 123shall 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.13. Responsibility13.1 The party responsible for the fastener shall
45、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 according to the manufacturers practice to preventdamage before and during shipment.14.1.2 When special packaging requirements
46、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 followin
47、g information:14.2.1.1 ASTM designation,14.2.1.2 Size,14.2.1.3 Name and brand or trademark of the manufacturer,14.2.1.4 Number of pieces,14.2.1.5 Purchase order number, and14.2.1.6 Country of origin.15. Keywords15.1 alloy steel; bolts; screwsSUPPLEMENTARY REQUIREMENTSThe following Supplementary Requ
48、irement shall apply only when specified by the purchaser in thecontract or purchase order. Supplementary requirements shall in no way negate any requirement of thespecification itself.S1. Specific Grade Chemical CompositionsS1.1 When Supplementary Requirement S1 is specified onthe order, the chemica
49、l composition shall conform to one of thecompositions in Table S1.1 at the option of the supplier, unlessa specific composition (Grade) has been specified on thepurchase order.F2882 124ASTM 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 such rights, are entirely their own responsibility.This standard is subject to revision at
