1、Designation: A 563 07Standard Specification forCarbons and Alloy Steel Nuts1This standard is issued under the fixed designation A 563; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthes
2、es indicates the year of last reapproval. Asuperscript epsilon (e) 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. Scope*1.1 This specification2covers chemical and mechanicalrequirements for eight
3、 grades of carbon and alloy steel nuts forgeneral structural and mechanical uses on bolts, studs, andother externally threaded parts.NOTE 1See Appendix X1 for guidance on suitable application of nutgrades.1.2 The requirements for any grade of nut may, at thesuppliers option, and with notice to the p
4、urchaser, be fulfilledby furnishing nuts of one of the stronger grades specifiedherein unless such substitution is barred in the inquiry andpurchase order.1.3 Grades C3 and DH3 nuts have atmospheric corrosionresistance and weathering characteristics comparable to that ofthe steels covered in Specifi
5、cations A 242/A 242M, A 588/A 588M, and A 709/A 709M. The atmospheric corrosionresistance of these steels is substantially better than that ofcarbon steel with or without copper addition (see 5.2). Whenproperly exposed to the atmosphere, these steels can be usedbare (uncoated) for many applications.
6、NOTE 2A complete metric companion to Specification A 563 hasbeen developedA 563M; therefore, no metric equivalents are presentedin this specification.1.4 Terms used in this specification are defined in Termi-nology F 1789 unless otherwise defined herein.2. Referenced Documents2.1 ASTM Standards:3A 1
7、94/A 194M Specification for Carbon and Alloy SteelNuts for Bolts for High Pressure or High TemperatureService, or BothA 242/A 242M Specification for High-Strength Low-AlloyStructural SteelA 307 Specification for Carbon Steel Bolts and Studs, 60000 PSI Tensile StrengthA 325 Specification for Structur
8、al Bolts, Steel, HeatTreated, 120/105 ksi Minimum Tensile StrengthA 354 Specification for Quenched and Tempered AlloySteel Bolts, Studs, and Other Externally Threaded Fasten-ersA 394 Specification for Steel Transmission Tower Bolts,Zinc-Coated and BareA 449 Specification for Hex Cap Screws, Bolts an
9、d Studs,Steel, Heat Treated, 120/105/90 ksi Minimum TensileStrength, General UseA 490 Specification for Structural Bolts, Alloy Steel, HeatTreated, 150 ksi Minimum Tensile StrengthA 588/A 588M Specification for High-Strength Low-AlloyStructural Steel, up to 50 ksi 345 MPa Minimum YieldPoint, with At
10、mospheric Corrosion ResistanceA 687 Specification for High-Strength Nonheaded SteelBolts and Studs4A 709/A 709M Specification for Structural Steel forBridgesA 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel ProductsB 695 Specification for Coatings of Zinc MechanicallyDepos
11、ited on Iron and SteelD 3951 Practice for Commercial PackagingF 606 Test Methods for Determining the Mechanical Prop-erties of Externally and Internally Threaded Fasteners,Washers, Direct Tension Indicators, and RivetsF 812/F 812M Specification for Surface Discontinuities ofNuts, Inch and Metric Ser
12、ies5F 1789 Terminology for F16 Mechanical FastenersF 2329 Specification for Zinc Coating, Hot-Dip, Require-ments for Application to Carbon and Alloy Steel Bolts,Screws, Washers, Nuts, and Special Threaded FastenersG 101 Guide for Estimating the Atmospheric CorrosionResistance of Low-Alloy Steels2.2
13、ANSI Standards:1This specification 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 Aug. 1, 2007. Published August 2007. Originallyapproved in 1966. Last previous editi
14、on approved in 2004 as A 563 04a.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA 563 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStanda
15、rds volume information, refer to the standards Document Summary page onthe ASTM website.4Withdrawn.5Withdrawn.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ANSI B1.1
16、 Unified Screw Threads6ANSI B18.2.2 Square and Hex Nuts63. Ordering Information3.1 Orders for nuts under this specification shall include thefollowing:3.1.1 Quantity (number of nuts),3.1.2 Nominal size and thread series of nuts,3.1.3 Style of nut (for example, heavy hex),3.1.4 Grade of nut,3.1.5 Zin
17、c CoatingSpecify the zinc-coating process re-quired, for example, hot-dip, mechanically deposited, or nopreference (see 4.7),3.1.6 Other FinishesSpecify other protective finish ifrequired,3.1.7 ASTM designation and year of issue, and3.1.8 Supplementary or special requirements.NOTE 3An example of an
18、ordering description follows: 100078-9heavy hex nuts, Grade DH, hot-dip zinc-coated, and lubricated, ASTM A563XX.4. Materials and Manufacture4.1 Steel for nuts shall be made by the open-hearth, basic-oxygen, or electric-furnace process except that steel for GradesO, A, and B nuts may be made by the
19、acid-bessemer process.4.2 Nuts may be made cold or hot by forming, pressing, orpunching or may be machined from bar stock.4.3 Grades DH and DH3 nuts shall be heat treated byquenching in a liquid medium from a temperature above thetransformation temperature and tempering at a temperature ofat least 8
20、00F.4.4 Grades C and D nuts made of steel having carboncontent not exceeding 0.20 %, phosphorus not exceeding0.04 %, and sulfur not exceeding 0.05 % by heat analysis maybe heat treated by quenching in a liquid medium from atemperature above the transformation temperature and need notbe tempered. Whe
21、n this heat treatment is used, there shall beparticular attention to the requirements in 6.1.1.4.5 Grades C, C3, and D nuts made of any steel permittedfor these grades may be heat treated by quenching in a liquidmedium from a temperature above the transformation tempera-ture and tempering at a tempe
22、rature of at least 800F.4.6 Threads shall be formed by tapping or machining.4.7 Zinc Coatings, Hot-Dip and Mechanically Deposited:4.7.1 When zinc-coated fasteners are required, the pur-chaser shall specify the zinc coating process, for example,hot-dip, mechanically deposited, or no preference.4.7.2
23、When hot-dip is specified, the fasteners shall bezinc-coated by the hot-dip process in accordance with therequirements of Specification F 2329.4.7.3 When mechanically deposited is specified, the fasten-ers shall be zinc coated by the mechanical deposition processin accordance with the requirements o
24、f Class 50 of Specifica-tion B 695.4.7.4 When no preference is specified, the supplier mayfurnish either a hot-dip zinc coating in accordance withSpecification F 2329, or a mechanically deposited zinc coatingin accordance with Specification B 695, Class 50. Threadedcomponents (bolts and nuts) shall
25、be coated by the samezinc-coating process and the suppliers option is limited to oneprocess per item with no mixed processes in a lot.4.7.5 Hot-dip zinc-coated nuts shall be tapped after zinccoating.4.7.6 Mechanically deposited zinc-coated nuts for assemblywith mechanically deposited zinc-coated bol
26、ts shall be tappedoversize prior to zinc coating and need not be retappedafterwards.4.8 Lubricant:4.8.1 Hot-dip and mechanically deposited zinc-coatedGrade DH nuts shall be provided with an additional lubricantwhich shall be clean and dry to the touch (see SupplementaryRequirement S1 to specify lubr
27、ication requirements for plainfinish nuts).4.8.2 See Supplementary Requirement S2 for option tospecify a dye in the lubricant.5. Chemical Composition5.1 Grades O, A, B, C, D, and DH shall conform to thechemical composition specified in Table 1.5.2 Grades C3 and DH3 shall conform to the chemicalcompo
28、sition specified in Table 2. See Guide G 101 for methodsof estimating the atmospheric corrosion resistance of low alloysteels.5.3 Resulfurized or rephosphorized steel, or both, are notsubject to rejection based on product analysis for sulfur orphosphorus.5.4 Application of heats of steel to which bi
29、smuth, sele-nium, tellurium, or lead has been intentionally added shall notbe permitted for Grades D, DH, and DH3.5.5 Chemical analyses shall be performed in accordancewith Test Methods, Practices, and Terminology A 751.6. Mechanical Properties6.1 Hardness:6.1.1 The hardness of nuts of each grade sh
30、all not exceedthe maximum hardness specified for the grade in Table 3.6Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.TABLE 1 Chemical Requirements for Grades O, A, B, C, D, andDH NutsGrade ofNutComposition, %Analysis Carbon Manganese,minPho
31、spho-rus, maxSulfur,maxO, A, B, C heat 0.55 max . 0.12 0.15Aproduct 0.58 max . 0.13B.DCheat 0.55 max 0.30 0.04 0.05product 0.58 max 0.27 0.048 0.058heat 0.200.55 0.60 0.04 0.05DHCproduct 0.180.58 0.57 0.048 0.058AFor Grades O, A, and B a sulfur content of 0.23 % max is acceptable with thepurchasers
32、approval.BAcid bessemer steel only.CFor Grades D and DH a sulfur content of 0.05 0.15 % is acceptable providedthe manganese is 1.35 % min.A5630726.1.2 Jam nuts, slotted nuts, nuts smaller in width acrossflats or thickness than standard hex nuts (7.1), and nuts thatwould require a proof load in exces
33、s of 160 000 lbf may befurnished on the basis of minimum hardness requirementsspecified for the grade in Table 3, unless proof load testing isspecified in the inquiry and purchase order.6.2 Proof Load:6.2.1 Nuts of each grade, except those listed in 6.1.2, shallwithstand the proof load stress specif
34、ied for the grade, size,style, thread series, and surface finish of the nut in Table 3 andTable 4.6.2.2 Nuts hot dip or mechanically zinc coated in accor-dance with 4.7.2 or 4.7.3 shall be proof load tested after zinccoating and overtapping.77. Dimensions7.1 Unless otherwise specified, nuts shall be
35、 plain (un-coated) and shall conform to the dimensions prescribed inANSI B18.2.2.7.2 Hex and hex-slotted nuts over 112 to 2 in. inclusiveshall have dimensions conforming to ANSI B18.2.2 calculatedusing the formulas for the 114 through 112-in. size range inAppendix III (Formulas for Nut Dimensions) o
36、fANSI B18.2.2.7.3 Threads: Plain (Uncoated) Nuts7.3.1 Unless otherwise specified, the threads shall conformto the dimensions for coarse threads with Class 2 B tolerancesprescribed in ANSI B1.1.7.4 Threads: Nuts Hot Dip Zinc Coated SpecificationF 2329( 4.7.2)7.4.1 Nuts to be used on bolts with Class
37、2A threads beforehot-dip zinc coating, and then hot-dip zinc coated in accor-dance with Specification F 2329, shall be tapped oversize aftercoating, to the minimum and maximum thread dimensions inTable 5. The major and minor diameters shall also be increasedby the allowance to provide the correspond
38、ing minimum andmaximum major and minor diameters.7.5 Threads: Nuts With Other Coatings7.5.1 Nuts to be used on bolts mechanically zinc coated oron bolts hot-dip zinc-coated to a specification other thanSpecification F 2329, or otherwise hot-dip coated, shall betapped oversize by a diametral amount s
39、ufficient to permitassembly on the coated bolt thread, unless other requirementsare specified in the inquiry or purchase order.7.5.2 When specifically permitted by the purchaser, nuts forbolts with electrodeposited coating, such as cadmium, zinc,and so forth, or with chemically applied coating may b
40、e tapped7Rotational capacity test procedures, nut rotations, and acceptance criteria are afunction of the bolt with which the nuts will be used. When required, they arecovered by the applicable bolt specification.TABLE 2 Chemical Requirements for Grades C3 and DH3 NutsElement Composition, %Classes f
41、or Grade C 3 NutsAGrade DH3NutsNABCDEFCarbon:Heat analysis . 0.330.40 0.380.48 0.150.25 0.150.25 0.200.25 0.200.25 0.200.53Product analysis . 0.310.42 0.360.50 0.140.26 0.140.26 0.180.27 0.190.26 0.190.55Manganese:Heat analysis . 0.901.20 0.700.90 0.801.35 0.401.20 0.601.00 0.901.20 0.40 minProduct
42、analysis . 0.861.24 0.670.93 0.761.39 0.361.24 0.561.04 0.861.24 0.37 minPhosphorus:Heat analysis 0.070.15 0.040 max 0.060.12 0.035 max 0.040 max 0.040 max 0.040 max 0.046 maxProduct analysis 0.070.155 0.045 max 0.060.125 0.040 max 0.045 max 0.045 max 0.045 max 0.052 maxSulfur:Heat analysis 0.050 ma
43、x 0.050 max 0.050 max 0.040 max 0.050 max 0.040 max 0.040 max 0.050 maxProduct analysis 0.055 max 0.055 max 0.055 max 0.045 max 0.055 max 0.045 max 0.045 max 0.055 maxSilicon:Heat analysis 0.200.90 0.150.35 0.300.50 0.150.35 0.250.50 0.150.35 0.150.35 .Product analysis 0.150.95 0.130.37 0.250.55 0.1
44、30.37 0.200.55 0.130.37 0.130.37 .Copper:Heat analysis 0.250.55 0.250.45 0.200.40 0.200.50 0.300.50 0.300.60 0.200.40 0.20 minProduct analysis 0.220.58 0.220.48 0.170.43 0.170.53 0.270.53 0.270.63 0.170.43 0.17 minNickel:Heat analysis 1.00 max 0.250.45 0.500.80 0.250.50 0.500.80 0.300.60 0.200.40 0.
45、20 minBProduct analysis 1.03 max 0.220.48 0.470.83 0.220.53 0.470.83 0.270.63 0.170.43 0.17 minChromium:Heat analysis 0.301.25 0.450.65 0.500.75 0.300.50 0.501.00 0.600.90 0.450.65 0.45 minProduct analysis 0.251.30 0.420.68 0.470.83 0.270.53 0.451.05 0.550.95 0.420.68 0.42 minVanadium:Heat analysis
46、. . . 0.020 min . . . .Product analysis . . . 0.010 min . . . .Molybdenum:Heat analysis . . 0.06 max . 0.10 max . . 0.15 minBProduct analysis . . 0.07 max . 0.11 max . . 0.14 minTitanium:Heat analysis . . . . 0.05 max . . .Product analysis . . . . . . . .AC3 nuts may be made of any of the above list
47、ed material classes. Selection of the class shall be at the option of the manufacturer.BNickel or molybdenum may be used.A563073oversize by a diametral amount sufficient to permit assemblyon the coated bolt thread.7.5.3 The allowable oversize tapping shall not exceed thatspecified in Table 5.8. Work
48、manship8.1 Surface discontinuity limits shall be in accordance withSpecification F 812/F 812M.TABLE 3 Mechanical RequirementsNuts with UNC, 8 UN, 6 UN and Coarser Pitch ThreadsGrade of Nut Nominal Nut Size,in.Style of Nut Proof Load Stress, ksiAHardnessNon-Zinc-CoatedNutsBZinc-CoatedNutsBBrinell Roc
49、kwellmin max min maxO14 to 112 square 69 52 103 302 B55 C32A14 to 112 square 90 68 116 302 B68 C32O14 to 112 hex 69 52 103 302 B55 C32A14 to 112 hex 90 68 116 302 B68 C32B14 to 1 hex 120 90 121 302 B69 C32B118 to 112 hex 105 79 121 302 B69 C32DC 14 to 112 hex 135 135 159 352 B84 C38DHD 14 to 112 hex 150 150 248 352 C24 C38DH312 to 1 hex 150 150 248 352 C24 C38A14 to 4 heavy hex 100 75 116 302 B68 C32B14 to 1 heavy hex 133 100 121 302 B69 C32B118 to 112 heavy
