1、Designation: A563M 07 (Reapproved 2013)Standard Specification forCarbon and Alloy Steel Nuts (Metric)1This standard is issued under the fixed designation A563M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revis
2、ion. 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. Scope1.1 This specification covers chemical and mec
3、hanical re-quirements for eight property classes of hex and hex-flangecarbon and alloy steel nuts for general structural and mechani-cal uses on bolts, studs, and other externally threaded parts.NOTE 1Throughout this specification, the term class means propertyclass.NOTE 2Requirements for the four c
4、lasses 5, 9, 10, and 12 areessentially identical with requirements given for these classes in ISO898/II. Requirements for Classes 8S and 10S are essentially identical withrequirements in an ISO 4775 Hexagon Nuts for High-Strength StructuralBolting with Large WidthAcross Flats, Product Grade B, Prope
5、rty Classes8 and 10. Classes 8S3 and 10S3 are not recognized in ISO standards.1.2 Classes 8S3 and 10S3 nuts have atmospheric corrosionresistance and weathering characteristics comparable to thoseof the steels covered in Specification A588/A588M. Theatmospheric corrosion resistance of these steels is
6、 substantiallybetter than that of carbon steel with or without copper addition(see 6.2). When properly exposed to the atmosphere, thesesteels can be used bare (uncoated) for many applications.1.3 The nut size range for which each class is applicable isgiven in the table on mechanical requirements.1.
7、4 Appendix X1 gives guidance to assist designers andpurchasers in the selection of a suitable class.1.5 Appendix X2 gives data on the properties of slotted hexnuts and hex jam nuts.1.6 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstan
8、dard.NOTE 3This specification is the metric companion of SpecificationA563.2. Referenced Documents2.1 ASTM Standards:2A153/A153M Specification for Zinc Coating (Hot-Dip) onIron and Steel HardwareA325M Specification for Structural Bolts, Steel, HeatTreated 830 MPa Minimum Tensile Strength (Metric)A39
9、4 Specification for Steel Transmission Tower Bolts,Zinc-Coated and BareA490M Specification for High-Strength Steel Bolts, Classes10.9 and 10.9.3, for Structural Steel Joints (Metric)A588/A588M Specification for High-Strength Low-AlloyStructural Steel, up to 50 ksi 345 MPa Minimum YieldPoint, with At
10、mospheric Corrosion ResistanceA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsB695 Specification for Coatings of Zinc Mechanically De-posited on Iron and SteelD3951 Practice for Commercial PackagingF568M Specification for Carbon and Alloy Steel ExternallyThreade
11、d Metric Fasteners (Metric) (Withdrawn 2012)3F606M Test Methods for Determining the Mechanical Prop-erties of Externally and Internally Threaded Fasteners,Washers, and Rivets (Metric)F812 Specification for Surface Discontinuities of Nuts, Inchand Metric SeriesF1789 Terminology for F16 Mechanical Fas
12、tenersG101 Guide for Estimating the Atmospheric Corrosion Re-sistance of Low-Alloy Steels2.2 ANSI Standards:4B 1.13M Metric Screw ThreadsM ProfileB 18.2.4.1M Metric Hex Nuts, Style 11This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Su
13、bcommittee F16.02 on Steel Bolts,Nuts, Rivets and Washers.Current edition approved Nov. 1, 2013. Published January 2014. Originallyapproved in 1980. Last previous edition approved in 2007 as A563M 07. DOI:10.1520/A0563M-07R13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orco
14、ntact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institu
15、te (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1B 18.2.4.2M Metric Hex Nuts, Style 2B 18.2.4.3M Metric Slotted Hex NutsB 18.2.4.4M Metric Hex Flange NutsB 18.
16、2.4.5M Metric Hex Jam NutsB 18.2.4.6M Metric Heavy Hex Nuts2.3 ISO Standards:4ISO 898/II Mechanical Properties of Fasteners, Part II, NutsWith Specified Proof LoadsISO 4775 Hexagon Nuts for High-Strength Structural Bolt-ing with Large Width Across FlatsProduct GradeBProperty Classes 8 and 103. Termi
17、nology3.1 Terms used in this specification are defined in Termi-nology F1789 unless otherwise defined herein.4. Ordering Information4.1 Orders for nuts under this specification shall include thefollowing:4.1.1 Quantity (number of nuts);4.1.2 Nominal diameter and thread pitch;4.1.3 Dimensional style
18、of nut (for example, hex, heavyhex, or hex flange);4.1.4 Property class of nut;4.1.5 Zinc CoatingSpecify the zinc coating processrequired, hot-dip, mechanically deposited, or no preference(see 5.7);4.1.6 Other FinishesSpecify other protective finish ifrequired;4.1.7 ASTM designation and year of issu
19、e; and4.1.8 Supplementary or special requirements.4.2 The strength requirements for any class of nut may besatisfied by substituting a nut of a higher class provided that thenut width across flats is the same. With the written approval ofthe purchaser, the supplier may substitute as follows: Class 1
20、2nuts for Classes 10, 9, and 5; Class 10 nuts for Classes 9 and5; Class 9 nuts for Class 5; Class 10S for Class 8S; Class 8S3for Class 8S; and Class 10S3 for Classes 10S, 8S, and 8S3.NOTE 4Purchasers are cautioned that different classes of nuts havedifferent nut thickness (see 8.2 through 8.5). Dime
21、nsional suitability of thenut for the intended application should be considered before approvingsubstitution of a higher class.NOTE 5Examples of ordering descriptions are: (1) 10 000 M12 1.75hex nuts, Class 9, ASTM A563MXX; (2) 2500 M24 3 heavy hex nuts,Class 10S, hot-dip zinc-coated, ASTM A563MXX;
22、and (3) 5000 M10 1.5 hex flange nuts, Class 10, ASTM A563MXX.5. Materials and Manufacture5.1 Steel for nuts shall be made by the open-hearth, basic-oxygen, or electric-furnace process.5.2 Nuts may be made cold or hot by forming, pressing, orpunching, or may be machined from bar stock.5.3 Classes 10,
23、 12, 10S, and 10S3 nuts shall be heat treatedby quenching in a liquid medium from a temperature above thetransformation temperature and tempering at a temperature ofat least 425C.5.4 Classes 8S and 8S3 nuts made of any steel permitted forthese classes may be heat treated by quenching in a liquidmedi
24、um from a temperature above the transformation tempera-ture and tempering at a temperature of at least 425C.5.5 Class 8S nuts made of steel having a carbon content notexceeding 0.20 %, phosphorus not exceeding 0.04 %, andsulfur not exceeding 0.05 % by heat analysis may be heattreated by quenching in
25、 a liquid medium from a temperatureabove the transformation temperature and need not be tem-pered. When this heat treatment is used, particular attentionshall be paid to the requirements in 7.1.5.6 Threads shall be formed, tapped, or machined.5.7 Zinc Coatings, Hot-Dip and Mechanically Deposited:5.7
26、.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.5.7.2 When hot-dip is specified, the fasteners shall bezinc-coated by the hot-dip process in accordance with therequirements of Class C of
27、Specification A153/A153M.5.7.3 When mechanically deposited is specified, the fasten-ers shall be zinc-coated by the mechanical-deposition processin accordance with the requirements of Class 55 of Specifica-tion B695.5.7.4 When no preference is specified, the supplier mayfurnish either a hot-dip zinc
28、 coating in accordance withSpecification A153/A153M, Class C, or a mechanically depos-ited zinc coating in accordance with Specification B695, Class55. All components of mating fasteners (bolts, nuts, andwashers) shall be coated by the same zinc coating process andthe suppliers option is limited to
29、one process per item with nomixed processes in a lot.5.7.5 Hot-dip zinc coated nuts shall be tapped after zinccoating in accordance with the thread limits in 8.8.5.7.6 Mechanically deposited zinc-coated nuts for assemblywith mechanically deposited zinc-coated bolts shall be tappedoversize in accorda
30、nce with the thread limits in 8.8 prior tozinc coating and need not be retapped afterwards.NOTE 6It is the intent of 5.7 and 5.8 together with the requirementsspecified in 8.8 that galvanized bolts and nuts will assemble freely,regardless of source of supply.5.8 Hot-dip and mechanically deposited zi
31、nc-coated Class10S nuts shall be provided with an additional lubricant thatshall be clean and dry to the touch.6. Chemical Composition6.1 Classes 5, 9, 8S, 10, 10S, and 12 shall conform to thechemical composition specified in Table 1.6.2 Classes 8S3 and 10S3 shall conform to the chemicalcomposition
32、specified in Table 2. See Guide G101 for methodsof estimating corrosion resistance of low alloy steels.6.3 Resulfurized or rephosphorized steel, or both, are notsubject to rejection based on product analysis for sulfur orphosphorus unless misapplication is clearly indicated.6.4 Application of heats
33、of steel to which bismuth,selenium, tellurium, or lead has been intentionally added shallnot be permitted for Classes 10, 12, 10S, and 10S3.6.5 Chemical analyses shall be performed in accordancewith Test Methods, Practices, and Terminology A751.A563M 07 (2013)27. Mechanical Properties7.1 The hardnes
34、s of nuts of each class shall not exceed themaximum hardness specified for the class in Table 3. This shallbe the only hardness requirement for nuts that are proof loadtested.7.2 Unless proof load testing is specified in the inquiry andpurchase order, nuts of all classes in nominal thread diametersM
35、4 and smaller, and nuts of all classes with proof loads greaterthan 530 kN, as specified in Table 4, may be furnished on thebasis of having a hardness not less than the minimum hardnessspecified in Table 3.7.3 Nuts of all classes, except those covered in 7.2, shallwithstand the proof load stress spe
36、cified for the diameter andclass of nut in Table 3.NOTE 7The proof load of a nut is the axially applied load the nut mustwithstand without thread stripping or rupture. Proof loads (Table 4) arecomputed by multiplying proof load stress (Table 3) by the nut threadstress area.8. Dimensions8.1 Unless ot
37、herwise specified, nuts shall be furnished plain(non-coated nor plated).8.2 Class 5 nuts in nominal thread diameters M36 andsmaller shall conform to dimensions for hex nuts, Style 1,given in ANSI B 18.2.4.1M. Class 5 nuts in nominal threaddiameters M42 and larger shall conform to dimensions forheavy
38、 hex nuts given in ANSI B 18.2.4.6M.8.3 Class 9 nuts in nominal thread diameters M20 andsmaller shall conform to dimensions for hex nuts, Style 2,given in ANSI B 18.2.4.2M or for hex flange nuts given inANSI B 18.2.4.4M. When the dimensional style of nut is notdesignated by the purchaser, hex nuts,
39、Style 2, in conformancewith ANSI B 18.2.4.2M shall be furnished. Class 9 nuts innominal thread diameters M24 to M36 inclusive shall conformto dimensions for hex nuts, Style 2, given in ANSIB 18.2.4.2M. Class 9 nuts in nominal thread diameters M42and larger shall conform to dimensions for heavy hex n
40、utsgiven in ANSI B 18.2.4.6M.8.4 Class 10 nuts in nominal thread diameters M20 andsmaller shall conform to dimensions for hex nuts, Style 1,given in ANSI B 18.2.4.1M or for hex flange nuts given inANSI B 18.2.4.4M. When the dimensional style of nut is notdesignated by the purchaser, hex nuts, Style
41、1, in conformancewith ANSI B 18.2.4.1M shall be furnished. Class 10 nuts innominal thread diameters from M24 to M36 inclusive shallconform to dimensions for hex nuts, Style 1 given in ANSIB 18.2.4.1M.8.5 Class 12 nuts in nominal thread diameters M20 andsmaller shall conform to dimensions for hex nut
42、s, Style 2,given in ANSI B 18.2.4.2M or for hex flange nuts given inANSI B 18.2.4.4M. When the dimensional style of the nut isnot designated by the purchaser, hex nuts, Style 2, in confor-mance with ANSI B 18.2.4.2M shall be furnished. Class 12nuts in nominal thread diameters M24 to M36 inclusive sh
43、allconform to dimensions for hex nuts, Style 2, given in ANSIB 18.2.4.2M. Class 12 nuts in nominal thread diameters M42and larger shall conform to dimensions for heavy hex nutsgiven in ANSI B 18.2.4.6M.8.6 Classes 8S, 8S3, 10S, and 10S3 in nominal threaddiameters M12 to M36 inclusive shall conform t
44、o dimensionsfor heavy hex nuts given in ANSI B 18.2.4.6M.8.7 Unless otherwise specified, threads in nuts shall be themetric coarse thread series as specified in ANSI B 1.13M, andshall have grade 6H tolerances.8.8 This requirement applies to nuts hot-dip and mechani-cally zinc-coated that are to be u
45、sed on bolts, screws, or studsthat have metric coarse threads with Grade 6G tolerancesbefore zinc-coating and then are hot-dip or mechanicallyzinc-coated, except as noted in 8.9, in accordance with 5.7.2and 5.7.3. Such nuts shall be tapped oversize to have internalthreads with maximum and minimum li
46、mits that exceed themaximum and minimum limits specified for metric coarseinternal threads with Grade 6H tolerances by the followingdiametral allowances:Nut DiameterDiametral Allowance,mM5 156M6 200M8 255M10 310M12 365M14 and M16 420M20 and M22 530M24 and M27 640M30 750M36 860M42 970M48 1080M56 1190
47、M64 to M100 1300NOTE 8Bolts, screws, and studs in diameters smaller than M10 are notnormally hot-dip zinc-coated.8.8.1 Internal threads shall be subject to acceptance gagingusing GO and HI thread plug gages having size limits asestablished in 8.8. Threads of nuts tapped after zinc coating(5.7) shall
48、 meet GO and HI thread plug gaging requirements astapped. Threads of nuts tapped prior to zinc coating (5.8) shallTABLE 1 Chemical RequirementsPropertyClass ofNutComposition, %Analysis Carbon Manga-nese,minPhos-phorus,maxSulfur,max5, 9, 8Sheatproduct0.55 max0.58 max.0.040.0480.15A.10B, 10Sheatproduc
49、t0.55 max0.58 max0.300.270.040.0480.050.05812Bheatproduct0.200.550.180.580.600.570.040.0480.050.0588S3, 10S3 See Table 2AFor Classes 5 and 9, a sulfur content of 0.23 % max. is acceptable with thepurchasers approval.BFor Classes 10 and 12, a sulfur content of 0.15 % max. is acceptable providedthe manganese is 1.35 % min.A563M 07 (2013)3meet HI thread plug gaging requirements prior to zinc coatingand GO thread plug gaging requirements after zinc coating.8.9 Nuts to be used on bolts, screws, or studs that arehot-dip or mechanically zinc-coated to requi
