A-563M-–-01

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A-563M-–-01

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  Designation: A 563M – 01METRIC Standard Specification for Carbon and Alloy Steel Nuts [Metric] 1 This standard is issued under the fixed designation A 563M; the number immediately following the designation indicates the year of srcinal adoption or, in the case of revision, the year of last revision. A number in parentheses 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 specification covers chemical and mechanical 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. N OTE  1—Throughout this specification, the term class means propertyclass.N OTE  2—Requirements for the four classes 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, Property 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 A 588/A 588M. Theatmospheric corrosion resistance of these steels is substantiallybetter than that of carbon steel with or without copper addition(see 5.2). 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.1.4 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. N OTE  3—This specification is the metric companion of SpecificationA 563. 2.ReferencedDocuments 2.1  ASTM Standards: A 153 Specification for Zinc Coating (Hot-Dip) on Iron andSteel Hardware 2 A 325M Specification for High-Strength Bolts for Struc-tural Steel Joints [Metric] 3 A 394 Specification for Steel Transmission Tower Bolts,Zinc-Coated and Bare 3 A 490M Specification for High-Strength Steel Bolts,Classes 10.9 and 10.9.3, for Structural Steel Joints [Met-ric] 3 A 588/A588M Specification for High-Strength Low-AlloyStructural Steel with 50 ksi [345 MPa] Minimum YieldPoint to 4 in. [100 mm] Thick  4 A 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel Products 5 B 695 Specification for Coatings of Zinc MechanicallyDeposited on Iron and Steel 6 D 3951 Practice for Commercial Packaging 7 F 606M Test Methods for Determining the MechanicalProperties of Externally and Internally Threaded Fasteners,Washers, and Rivets [Metric] 3 F 812/F812M Specification for Surface Discontinuities of Nuts, Inch and Metric Series 3 G 101 Guide for Estimating the Atmospheric CorrosionResistance of Low-Alloy Steels 8 2.2  ANSI Standards: 9 B 1.13M Metric Screw Threads—M ProfileB 18.2.4.1M Metric Hex Nuts, Style 1B 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 18.2.4.5M Metric Hex Jam NutsB 18.2.4.6M Metric Heavy Hex Nuts2.3  ISO Standards: 9 ISO 898/II Mechanical Properties of Fasteners, Part II, Nuts 1 This 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 Oct. 10, 2001. Published December 2001. Originallypublished as A 563M – 80. Last previous edition A 563M – 00. 2  Annual Book of ASTM Standards , Vol 01.06. 3  Annual Book of ASTM Standards , Vol 01.08. 4  Annual Book of ASTM Standards , Vol 01.04. 5  Annual Book of ASTM Standards , Vol 01.03. 6  Annual Book of ASTM Standards , Vol 02.05. 7  Annual Book of ASTM Standards , Vol 15.09. 8  Annual Book of ASTM Standards , Vol 03.02. 9 Available from American National Standards Institute, 11 West 42nd St., 13thFloor, New York, NY 10036. 1 *ASummaryofChangessectionappearsattheendofthisstandard. Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. NOTICE: This standard has either been superceded and replaced by a new version or discontinued. Contact ASTM International (www.astm.org) for the latest information.  With Specified Proof LoadsISO 4775 Hexagon Nuts for High-Strength Structural Bolt-ing with Large Width Across Flats—Product GradeB—Property Classes 8 and 10 3.OrderingInformation 3.1 Orders for nuts under this specification shall include thefollowing:3.1.1 Quantity (number of nuts);3.1.2 Nominal diameter and thread pitch;3.1.3 Dimensional style of nut (for example, hex, heavyhex, or hex flange);3.1.4 Property class of nut;3.1.5  Zinc Coating —Specify the zinc coating process re-quired, hot-dip, mechanically deposited, or no preference (see4.7);3.1.6  Other Finishes —Specify other protective finish if required;3.1.7 ASTM designation and year of issue; and3.1.8 Any special requirements.3.2 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 of the purchaser, the supplier may substitute as follows: Class 12nuts 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. N OTE  4—Purchasers are cautioned that different classes of nuts havedifferent nut thickness (see 7.2 through 7.5). Dimensional suitability of thenut for the intended application should be considered before approvingsubstitution of a higher class.N OTE  5—Examples of ordering descriptions are: ( a ) 10 000 M12  3 1.75 hex nuts, Class 9,ASTMA 563M–XX; ( b ) 2500 M24  3  3 heavy hexnuts, Class 10S, hot-dip zinc-coated, ASTM A 563M–XX; and ( c ) 5000M10  3  1.5 hex flange nuts, Class 10, ASTM A 563M–XX. 4.MaterialsandManufacture 4.1 Steel for nuts shall be made by the open-hearth, basic-oxygen, or electric-furnace process.4.2 Nuts may be made cold or hot by forming, pressing, orpunching, or may be machined from bar stock.4.3 Classes 10, 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 of at least 425°C.4.4 Classes 8S and 8S3 nuts made of any steel permitted forthese classes may be heat treated by quenching in a liquidmedium from a temperature above the transformation tempera-ture and tempering at a temperature of at least 425°C.4.5 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 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 6.1.4.6 Threads shall be formed, tapped, or machined.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 When hot-dip is specified, the fasteners shall bezinc-coated by the hot-dip process in accordance with therequirements of Class C of Specification A 153.4.7.3 When mechanically deposited is specified, the fasten-ers shall be zinc-coated by the mechanical-deposition processin accordance with the requirements of Class 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 A 153, Class C, or a mechanically deposited zinccoating in accordance with Specification B 695, Class 50. Allcomponents of mating fasteners (bolts, nuts, and washers) shallbe coated by the same zinc coating process and the supplier’soption 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 zinccoating in accordance with the thread limits in 7.8.4.7.6 Mechanically deposited zinc-coated nuts for assemblywith mechanically deposited zinc-coated bolts shall be tappedoversize in accordance with the thread limits in 7.8 prior tozinc coating and need not be retapped afterwards. N OTE  6—It is the intent of 4.7 and 4.8 together with the requirementsspecified in 7.8 that galvanized bolts and nuts will assemble freely,regardless of source of supply. 4.8 Hot-dip and mechanically deposited zinc-coated Class10S nuts shall be provided with an additional lubricant thatshall be clean and dry to the touch. 5.ChemicalComposition 5.1 Classes 5, 9, 8S, 10, 10S, and 12 shall conform to thechemical composition specified in Table 1.5.2 Classes 8S3 and 10S3 shall conform to the chemicalcomposition specified in Table 2. See Guide G 101 for methodsof estimating corrosion resistance of low alloy steels.5.3 Resulfurized or rephosphorized steel, or both, are notsubject to rejection based on product analysis for sulfur orphosphorus unless misapplication is clearly indicated.5.4 Application of heats of steel to which bismuth, sele-nium, tellurium, or lead has been intentionally added shall notbe permitted for Classes 10, 12, 10S, and 10S3. TABLE 1 Chemical Requirements PropertyClass ofNutComposition, %Analysis Carbon Manga-nese,minPhos-phorus,maxSulfur,max5, 9, 8S heatproduct0.55 max0.58 max. . .. . .0.040.0480.15 A . . .10 B  , 10S heatproduct0.55 max0.58 max0.300.270.040.0480.050.05812 B  heatproduct0.20–0.550.18–0.580.600.570.040.0480.050.0588S3, 10S3 See Table 2 A For Classes 5 and 9, a sulfur content of 0.23 % max. is acceptable with thepurchasers approval. B  For Classes 10 and 12, a sulfur content of 0.15 % max. is acceptable providedthe manganese is 1.35 % min. A 563M 2 NOTICE: This standard has either been superceded and replaced by a new version or discontinued. Contact ASTM International (www.astm.org) for the latest information.  5.5 Chemical analyses shall be performed in accordancewith Test Methods A 751. 6.MechanicalProperties 6.1 The hardness 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.6.2 Unless proof load testing is specified in the inquiry andpurchase order, nuts of all classes in nominal thread diametersM4 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 3.6.3 Nuts of all classes, except those covered in 6.2, shallwithstand the proof load stress specified for the diameter andclass of nut in Table 3. N OTE  7—The 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. 7.Dimensions 7.1 Unless otherwise specified, nuts shall be furnished plain(non-coated nor plated).7.2 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 hex nuts given in ANSI B 18.2.4.6M.7.3 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, Style 2, in conformancewith ANSI B 18.2.4.2M shall be furnished. Class 9 nuts innominal thread diameters M24 to M36 inclusive shall conform TABLE 2 Chemical Requirements for Classes 8S3 and 10S3 Nuts Element Composition, %Steel Analyses for Class 8S3 Nuts A Class10S3NutsN A B C D E FCarbon:Heat analysis . . . 0.33–0.40 0.38–0.48 0.15–0.25 0.15–0.25 0.20–0.25 0.20–0.25 0.20–0.53Product analysis . . . 0.31–0.42 0.36–0.50 0.14–0.26 0.14–0.26 0.18–0.27 0.19–0.26 0.19–0.55Manganese:Heat analysis . . . 0.90–1.20 0.70–0.90 0.80–1.35 0.40–1.20 0.60–1.00 0.90–1.20 0.40 minProduct analysis . . . 0.86–1.24 0.67–0.93 0.76–1.39 0.36–1.24 0.56–1.04 0.86–1.24 0.37 minPhosphorus:Heat analysis 0.07–0.15 0.040 max 0.06–0.12 0.035 max 0.040 max 0.040 max 0.040 max 0.046 maxProduct analysis 0.07–0.155 0.045 max 0.06–0.125 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 0.055 max 0.045 max 0.055 max 0.045 max 0.045 max 0.055 maxSilicon:Heat analysis 0.20–0.90 0.15–0.35 0.30–0.50 0.15–0.35 0.25–0.50 0.15–0.35 0.15–0.35 . . .Product analysis 0.15–0.95 0.13–0.37 0.25–0.55 0.13–0.37 0.20–0.55 0.13–0.37 0.13–0.37 . . .Copper:Heat analysis 0.25–0.55 0.25–0.45 0.20–0.40 0.20–0.50 0.30–0.50 0.30–0.60 0.20–0.40 0.20 minProduct analysis 0.22–0.58 0.22–0.48 0.17–0.43 0.17–0.53 0.27–0.53 0.27–0.63 0.17–0.43 0.17 minNickel:Heat analysis 1.00 max 0.25–0.45 0.50–0.80 0.25–0.50 0.50–0.80 0.30–0.60 0.20–0.40 0.20 min B  Product analysis 1.03 max 0.22–0.48 0.47–0.83 0.22–0.53 0.47–0.83 0.27–0.63 0.17–0.43 0.17 minChromium:Heat analysis 0.30–1.25 0.45–0.65 0.50–0.75 0.30–0.50 0.50–1.00 0.60–0.90 0.45–0.65 0.30 minProduct analysis 0.25–1.30 0.42–0.68 0.47–0.83 0.27–0.53 0.45–1.05 0.55–0.95 0.42–0.68 0.25 minVanadium:Heat analysis . . . . . . . . . 0.020 min . . . . . . . . . . . .Product analysis . . . . . . . . . 0.010 min . . . . . . . . . . . .Molybdenum:Heat analysis . . . . . . 0.06 max . . . 0.10 max . . . . . . 0.15 min B  Product analysis . . . . . . 0.07 max . . . 0.11 max . . . . . . 0.14 minTitanium:Heat analysis . . . . . . . . . . . . 0.05 max . . . . . . . . .Product analysis . . . . . . . . . . . . . . . . . . . . . . . . A Class 8S3 nuts may be made of any of the listed steel analyses. Selection of steel analysis shall be the option of the manufacturer. B  Nickel or molybdenum may be used. A 563M 3 NOTICE: This standard has either been superceded and replaced by a new version or discontinued. Contact ASTM International (www.astm.org) for the latest information.  to 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 nutsgiven in ANSI B 18.2.4.6M.7.4 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 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.7.5 Class 12 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 the nut isnot designated by the purchaser, hex nuts, Style 2, in conform-ance with ANSI B 18.2.4.2M shall be furnished. Class 12 nutsin nominal thread diameters M24 to M36 inclusive shallconform 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.7.6 Classes 8S, 8S3, 10S, and 10S3 in nominal threaddiameters M12 to M36 inclusive shall conform to dimensionsfor heavy hex nuts given in ANSI B 18.2.4.6M.7.7 Unless otherwise specified, threads in nuts shall be themetric coarse thread series as specified in ANSI B 1.13M, andshall have grade 6H tolerances.7.8 This requirement applies to nuts hot-dip and mechani-cally zinc-coated that are to be used 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 7.9, in accordance with 4.7.2and 4.7.3. Such nuts shall be tapped over-size to have internalthreads with maximum and minimum limits that exceed themaximum and minimum limits specified for metric coarse TABLE 3 Mechanical Requirements of Nuts NominalDiameterProperty Class5 5 (overtapped) 9ProofLoadStress,MPaHardness ProofLoadStress,MPaHardness ProofLoadStress,MPaHardnessRockwell Vickers Rockwell Vickers Rockwell Vickersmin max min max min max min max min max min maxM1.6 to M2.5M3 to M4 520 B70 C30 130 302 . . . . . . . . . . . . . . .. . .900. . .B85. . .C30. . .170. . .302M5 and M6 580 B70 C30 130 302 465 B70 C30 130 302 915 B89 C30 188 302M8 and M10 590 B70 C30 130 302 470 B70 C30 130 302 940 B89 C30 188 302M12 to M16 610 B70 C30 130 302 490 B70 C30 130 302 950 B89 C30 188 302M20 to M36 630 B78 C30 146 302 500 B78 C30 146 302 920 B89 C30 188 302M42 to M100 630 B70 C30 128 302 500 B70 C30 128 302 920 B89 C30 188 302Property Class10 12 12 (Overtapped)ProofLoadStress,MPaHardness ProofLoadStress,MPaHardness ProofLoadStress,MPaHardnessRockwell Vickers Rockwell Vickers Rockwell Vickersmin max min max min max min max min max min maxM1.6 to M2.5 . . . . . . . . . . . . . . . . . . . . . . . . . . .M3 to M4 1040 C26 C36 272 353 1150 C26 C36 272 353M5 and M6 920 C26 C36 272 353M8 and M10 1160 C26 C36 272 353 930 C26 C36 272 353M12 to M16 1050 C26 C36 272 353 1190 C26 C36 272 353 950 C26 C36 272 353M20 to M36 1060 C26 C36 272 353 1200 C26 C36 272 353 960 C26 C36 272 353M42 to M100 . . . . . . . . . . . . . . . 1200 C26 C36 272 353 960 C26 C36 272 353Property Class8S and 8S3 10S and 10S3 10 S (Overtapped)ProofLoadStress,MPaHardness ProofLoadStress,MPaHardness ProofLoadStress,MPaHardnessRockwell Vickers Rockwell Vickers Rockwell Vickersmin max min max min max min max min max min maxM12 to M36 1075 B89 C38 188 372 1245 C26 C38 272 372 1165 C26 C38 272 372 A 563M 4 NOTICE: This standard has either been superceded and replaced by a new version or discontinued. Contact ASTM International (www.astm.org) for the latest information.
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