1、Designation: A563 07a (Reapproved 2014)A563 15Standard Specification forCarbon and Alloy Steel Nuts1This standard is issued under the fixed designation A563; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision
2、. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This specification2 covers chemical and mech
3、anical requirements for eight grades of carbon and alloy steel nuts for generalstructural and mechanical uses on bolts, studs, and other externally threaded parts.NOTE 1See Appendix X1 for guidance on suitable application of nut grades.1.2 The requirements for any grade of nut may, at the suppliers
4、option, and with notice to the purchaser, be fulfilled byfurnishing nuts of one of the stronger grades specified herein unless such substitution is barred in the inquiry and purchase order.1.3 Grades C3 and DH3 nuts have atmospheric corrosion resistance and weathering characteristics comparable to t
5、hat of thesteels covered in Specifications A242/A242M, A588/A588M, and A709/A709M. The atmospheric corrosion resistance of thesesteels is substantially better than that of carbon steel with or without copper addition (see 5.2). When properly exposed to theatmosphere, these steels can be used bare (u
6、ncoated) for many applications.NOTE 2A complete metric companion to Specification A563 has been developedA563M; therefore, no metric equivalents are presented in thisspecification.1.4 Terms used in this specification are defined in Terminology F1789 unless otherwise defined herein.2. Referenced Docu
7、ments2.1 ASTM Standards:3A194/A194M Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or HighTemperature Service, or BothA242/A242M Specification for High-Strength Low-Alloy Structural SteelA307 Specification for Carbon Steel Bolts, Studs, and Threaded
8、 Rod 60 000 PSI Tensile StrengthA325 Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile StrengthA354 Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded FastenersA394 Specification for Steel Transmission Tower Bolts, Zinc-
9、Coated and BareA449 Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength,General UseA490 Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile StrengthA563M Specification for Carbon and Alloy Steel Nuts (Metr
10、ic)A588/A588M Specification for High-Strength Low-Alloy Structural Steel, up to 50 ksi 345 MPa Minimum Yield Point, withAtmospheric Corrosion ResistanceA687 Specification for High-Strength Nonheaded Steel Bolts and Studs (Withdrawn 1999)4A709/A709M Specification for Structural Steel for BridgesA751
11、Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsB695 Specification for Coatings of Zinc Mechanically Deposited on Iron and SteelD3951 Practice for Commercial Packaging1 This specification is under the jurisdiction of ASTM Committee F16 on Fasteners and is the direct r
12、esponsibility of Subcommittee F16.02 on Steel Bolts, Nuts, Rivetsand Washers.Current edition approved April 1, 2014May 1, 2015. Published May 2014July 2015. Originally approved in 1966. Last previous edition approved in 20072014 asA563 07a.A563 07a(2014). DOI: 10.1520/A0563-07AR14.10.1520/A0563-15.2
13、 For ASME Boiler and Pressure Vessel Code applications see related Specification SA 563 in Section II of that Code.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to th
14、e standards Document Summary page on the ASTM website.4 The last approved version of this historical standard is referenced on www.astm.org.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
15、version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that 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.*A Summary of Changes
16、section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1F606 Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, andRivets (Metric) F0606_
17、F0606MF812/F812M Specification for Surface Discontinuities of Nuts, Inch and Metric SeriesF1789 Terminology for F16 Mechanical FastenersF2329 Specification for Zinc Coating, Hot-Dip, Requirements forApplication to Carbon andAlloy Steel Bolts, Screws,Washers,Nuts, and Special Threaded FastenersG101 G
18、uide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels2.2 ANSI Standards:ANSI B1.1 Unified Screw Threads5ANSI B18.2.2 Square and Hex Nuts53. Ordering Information3.1 Orders for nuts under this specification shall include the following:3.1.1 Quantity (number of nuts),3.1.2 Nomina
19、l 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 Zinc CoatingSpecify the zinc-coating process required, for example, hot-dip, mechanically deposited, or no preference(see 4.7),3.1.6 Other FinishesSpecify other protective finish if required,3.1.7 A
20、STM designation and year of issue, and3.1.8 Supplementary or special requirements.NOTE 3An example of an ordering description follows: 1000 78-9 heavy 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,
21、basic-oxygen, or electric-furnace process except that steel for Grades O,A, and B nuts may be made by the acid-bessemer process.4.2 Nuts may be made cold or hot by forming, pressing, or punching or may be machined from bar stock.4.3 Grades DH and DH3 nuts shall be heat treated by quenching in a liqu
22、id medium from a temperature above thetransformation temperature and tempering at a temperature of at least 800F.4.4 Grades C and D nuts made of steel having carbon content not exceeding 0.20 %, phosphorus not exceeding 0.04 %, andsulfur not exceeding 0.05 % by heat analysis may be heat treated by q
23、uenching in a liquid medium from a temperature above thetransformation temperature and need not be tempered. When this heat treatment is used, there shall be particular attention to therequirements in 6.1.1.4.5 Grades C, C3, and D nuts made of any steel permitted for these grades may be heat treated
24、 by quenching in a liquid mediumfrom a temperature above the transformation temperature and tempering at a temperature 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 purchas
25、er shall specify the zinc coating process, for example, hot-dip,mechanically deposited, or no preference.4.7.2 When hot-dip is specified, the fasteners shall be zinc-coated by the hot-dip process in accordance with the requirementsof Specification F2329.4.7.3 When mechanically deposited is specified
26、, the fasteners shall be zinc coated by the mechanical deposition process inaccordance with the requirements of Class 55 of Specification B695.4.7.4 When no preference is specified, the supplier may furnish either a hot-dip zinc coating in accordance with SpecificationF2329, or a mechanically deposi
27、ted zinc coating in accordance with Specification B695, Class 55. Threaded components (bolts andnuts) shall be coated by the same zinc-coating process and the suppliers option is limited to one process per item with no mixedprocesses in a lot.4.7.5 Hot-dip zinc-coated nuts shall be tapped after zinc
28、 coating.4.7.6 Mechanically deposited zinc-coated nuts for assembly with mechanically deposited zinc-coated bolts shall be tappedoversize prior to zinc coating and need not be retapped afterwards.4.8 Lubricant:5 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor,
29、New York, NY 10036, http:/www.ansi.org.A563 1524.8.1 Hot-dip and mechanically deposited zinc-coated Grade DH nuts shall be provided with an additional lubricant which shallbe clean and dry to the touch (see Supplementary Requirement S1 to specify lubrication requirements for plain finish nuts).4.8.2
30、 See Supplementary Requirement S2 for option to specify a dye in the lubricant.5. Chemical Composition5.1 Grades O, A, B, C, D, and DH shall conform to the chemical composition specified in Table 1.5.2 Grades C3 and DH3 shall conform to the chemical composition specified in Table 2. See Guide G101 f
31、or methods ofestimating the atmospheric corrosion resistance of low alloy steels.5.3 Resulfurized or rephosphorized steel, or both, are not subject to rejection based on product analysis for sulfur or phosphorus.5.4 Application of heats of steel to which bismuth, selenium, tellurium, or lead has bee
32、n intentionally added shall not bepermitted for Grades D, DH, and DH3.5.5 Chemical analyses shall be performed in accordance with Test Methods, Practices, and Terminology A751.6. Mechanical Properties6.1 Hardness:6.1.1 The hardness of nuts of each grade shall not exceed the maximum hardness specifie
33、d for the grade in Table 3.6.1.2 Jam nuts, slotted nuts, nuts smaller in width across flats or thickness than standard hex nuts (7.1), and nuts that wouldrequire a proof load in excess of 160 000 lbf may be furnished on the basis of minimum hardness requirements specified for thegrade in Table 3, un
34、less proof load testing is specified in the inquiry and purchase order.6.2 Proof Load:6.2.1 Nuts of each grade, except those listed in 6.1.2, shall withstand the proof load stress specified for the grade, size, style,thread series, and surface finish of the nut in Table 3 and Table 4.6.2.2 Nuts hot
35、dip or mechanically zinc coated in accordance with 4.7.2 or 4.7.3 shall be proof load tested after zinc coatingand overtapping.67. Dimensions7.1 Unless otherwise specified, nuts shall be plain (uncoated) and shall conform to the dimensions prescribed inANSI B18.2.2.7.2 Hex and hex-slotted nuts over
36、112 to 2 in. inclusive shall have dimensions conforming to ANSI B18.2.2 calculated usingthe formulas for the 114 through 112-in. size range in Appendix III (Formulas for Nut Dimensions) of ANSI B18.2.2.7.3 Threads: Plain (Uncoated) Nuts7.3.1 Unless otherwise specified, the threads shall conform to t
37、he dimensions for coarse threads with Class 2 B tolerancesprescribed in ANSI B1.1.7.4 Threads: Nuts Hot Dip Zinc Coated Specification F2329( 4.7.2)6 Rotational capacity test procedures, nut rotations, and acceptance criteria are a function of the bolt with which the nuts will be used. When required,
38、 they are coveredby the applicable bolt specification.TABLE 1 Chemical Requirements for Grades O, A, B, C, D, andDH NutsGrade ofNutComposition, %Analysis Carbon Manganese,minPhospho-rus, maxSulfur,maxO, A, B, C heat 0.55 max . 0.12 0.15Aproduct 0.58 max . 0.13B .DC heat 0.55 max 0.30 0.04 0.05produc
39、t 0.58 max 0.27 0.048 0.058heat 0.200.55 0.60 0.04 0.05DHC product 0.180.58 0.57 0.048 0.058A For Grades O, A, and B a sulfur content of 0.23 % max is acceptable with thepurchasers approval.B Acid bessemer steel only.C For Grades D and DH a sulfur content of 0.05 0.15 % is acceptable providedthe man
40、ganese is 1.35 % min.A563 1537.4.1 Nuts to be used on bolts with Class 2A threads before hot-dip zinc coating, and then hot-dip zinc coated in accordancewith Specification F2329, shall be tapped oversize after coating, to the minimum and maximum thread dimensions in Table 5. Themajor and minor diame
41、ters shall also be increased by the allowance to provide the corresponding minimum and maximum majorand minor diameters.7.5 Threads: Nuts With Other Coatings7.5.1 Nuts to be used on bolts mechanically zinc coated or on bolts hot-dip zinc-coated to a specification other than SpecificationF2329, or ot
42、herwise hot-dip coated, shall be tapped oversize by a diametral amount sufficient to permit assembly on the coatedbolt thread, unless other requirements are specified in the inquiry or purchase order.7.5.2 When specifically permitted by the purchaser, nuts for bolts with electrodeposited coating, su
43、ch as cadmium, zinc, and soforth, or with chemically applied coating may be tapped oversize by a diametral amount sufficient to permit assembly on the coatedbolt thread.7.5.3 The allowable oversize tapping shall not exceed that specified in Table 5.8. Workmanship8.1 Surface discontinuity limits shal
44、l be in accordance with Specification F812/F812M.9. Number of Tests9.1 The requirements of this specification shall be met in continuous mass production for stock, and the manufacturer shall makesample inspections to ensure that the product conforms to the specified requirements. Additional tests of
45、 individual shipments ofmaterial are not ordinarily contemplated. Individual heats of steel are not identified in the finished product.9.2 When additional tests are specified in the inquiry and purchase order, a lot, for purposes of selecting test samples, shallconsist of all material offered for in
46、spection at one time that has the following common characteristics:9.2.1 Grade,9.2.2 Nominal size,TABLE 2 Chemical Requirements for Grades C3 and DH3 NutsElement Composition, %Classes for Grade C3 NutsA Grade DH3NutsN A B C D E FCarbon:Heat analysis . 0.330.40 0.380.48 0.150.25 0.150.25 0.200.25 0.2
47、00.25 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 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.
48、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 max 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
49、.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 0.130.37 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 0.20 m
