1、Designation: A 540/A 540M 06Standard Specification forAlloy-Steel Bolting Materials for Special Applications1This standard is issued under the fixed designationA 540/A 540M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year
2、of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification2covers regular and special-qualityalloy steel bolting materials which may be used for nuclear
3、andother special applications. Bolting materials as used in thisspecification cover rolled or forged bars, rotary pierced orextruded seamless tubes, bored bars, or forged hollows fromforged or rolled bar segments to be manufactured into bolts,studs, washers, and nuts.1.2 Several grades of steel are
4、covered. The grade and classshall be specified by the purchaser.1.3 Supplementary requirements of an optional nature areprovided for use when special quality is desired. Thesesupplementary requirements call for additional tests to be madeand when desired shall be so stated in the order, together wit
5、hthe acceptance limits required.1.4 This specification is expressed in both inch-pound unitsand in SI units. However, unless the order specifies theapplicable“ M” specification designation (SI units), the mate-rial shall be furnished to inch-pound units.1.5 The values stated in either inch-pound uni
6、ts or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance wit
7、h the specifi-cation.2. Referenced Documents2.1 ASTM Standards:3A 962/A 962M Specification for Common Requirementsfor Steel Fasteners or Fastener Materials, or Both, Intendedfor Use at Any Temperature from Cryogenic to the CreepRangeE45 Test Methods for Determining the Inclusion Contentof Steel2.2 A
8、IAG Standard:AIAG B-5 02.00 Primary Metals Identification Tag Appli-cation Standard42.3 ANSI Standards:5B 1.1 Unified Screw ThreadsB 18.2.1 Square and Hex Bolts and Screws Including HexCap Screws and Lag BoltsB 18.2.2 Square and Hex NutsB 18.3 Hexagon Socket and Spline Socket Screws3. Ordering Infor
9、mation3.1 The inquiry and orders for material under this specifi-cation shall include the following, as required, to describe thedesired material adequately:3.1.1 Condition (Section 5),3.1.2 Heat treatment (Section 6),3.1.3 Supplementary Requirements (S1 to S9),3.1.4 Reports required (Section 17),3.
10、1.5 End use, and3.1.6 Any special requirements.3.2 The purchaser is referred to the listed supplementaryrequirements.4. Common Requirements4.1 Material and fasteners supplied to this specification shallconform to the requirements of Specification A 962/A 962M.These requirements include test methods,
11、 finish, thread dimen-sions, marking, certification, optional supplementary require-ments, and others. Failure to comply with the requirements ofSpecification A 962/A 962M constitutes nonconformance withthis specification. In case of conflict between this specificationand Specification A 962/A 962M,
12、 this specification shall pre-vail.5. Manufacture5.1 The material shall be supplied hot-rolled or hot-forgedor cold-finished at the option of the producer. However, ifdesired by the purchaser, cold finishing may be specified.1This specification is under the jurisdiction of ASTM Committee A01 on Stee
13、l,Stainless Steel, and Related Alloys, and is the direct responsibility of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved March 1, 2006. Published March 2006. Originallyapprov
14、ed in 1965. Last previous edition approved in 2005 as A 540/A 540M 05.2For ASME Boiler and Pressure Vessel Code Applications see related Specifi-cation SA-540 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceas
15、tm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Available from Automotive Industry Action Group, 26200 Lahser, Suite 200,Southfield, MI 48034.5Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th
16、 Floor, New York, NY 10036.1*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.6. Heat Treatment6.1 Material which is ordered in the annealed conditionshall have a structu
17、re suitable for machining. Such annealedbolting material is not intended to be used without subsequentquenching and tempering as specified in 6.26.2 Material which is ordered in the liquid-quenched andtempered condition shall be uniformly reheated from a tem-perature below the cooling transformation
18、 range to the properaustenitizing temperature. It shall be quenched in a liquidmedium under substantially uniform conditions and then uni-formly reheated for tempering. The minimum tempering tem-perature shall be 850 F 455 C.6.3 Material that has been straightened after quenching andtempering shall
19、be stress relieved by reheating to a temperaturenot lower than 100 F 55 C under the tempering tempera-ture.7. Chemical Composition7.1 The steel shall conform to the chemical requirementsprescribed in Table 1.8. Tensile Requirements8.1 Material furnished in the annealed condition shall becapable of m
20、eeting the specified tensile properties for the classas specified in Table 2 when heat treated in accordance with 6.2and 6.3 (see Supplementary Requirement S4).8.2 Material in the quenched and tempered or quenched,tempered and stress-relieved condition shall conform to prop-erties shown in Table 2 f
21、or the specified class.9. Hardness Requirements9.1 The hardness shall be determined on the surface of thematerial after removal of decarburization.9.2 The hardness of material in the annealed condition shallnot be greater than 235 HB.9.3 The hardness of material in the quenched and temperedor quench
22、ed, tempered and stress-relieved condition shall bewithin the limits in Table 2 for the specified class.10. Impact Requirements10.1 Annealed material after proper heat treatment shall becapable of meeting the impact requirements in Table 2 or ofSupplementary Requirement S8, if so specified (see Supp
23、le-mentary Requirement S4).10.2 Material in the quenched and tempered or quenched,tempered, and stress-relieved condition shall conform to theimpact requirements in Table 2, or of Supplementary Require-ment S8 if so specified.10.3 The percent of shear (ductility or fibrous) fracture shallbe computed
24、. The computed value shall be recorded for allimpact specimens.10.4 The amount of lateral expansion shall be measured.The measured value shall be recorded for all impact specimens.10.5 The percent shear and the amount of lateral expansionshall be reported for information purposes (see 17.1).TABLE 1
25、Chemical RequirementsAIdentificationSymbolGrade$ B21 B22 B23 B24 B24V(Cr-Mo-V) (4142-H) (E-4340-H) (4340 Mod.) (4340V Mod.)Chromium-Molybdenum-VanadiumChromium-MolybdenumChromium-Nickel-MolybdenumChromium-Nickel-MolybdenumChromium-Nickel-Molybdenum-VanadiumRange, % ProductVariation,Over orUnder,B%Ra
26、nge, % ProductVariation,Over orUnder,B%Range, % ProductVariation,Over orUnder,B%Range, % ProductVariation,Over orUnder,B%ProductVariation,Over orUnder,B%Carbon 0.360.44 0.02 0.390.46 0.02 0.370.44 0.02 0.370.44 0.02 0.370.44 0.02Manganese 0.450.70 0.03 0.651.10 0.04 0.600.95 0.04 0.700.90 0.04 0.600
27、.95 0.04Phosphorus, max 0.025C0.005 0.025C0.005 0.025C0.005 0.025C0.005 0.025C0.005Sulfur, max 0.025C0.005 0.025C0.005 0.025C0.005 0.025C0.005 0.025C0.005Silicon 0.150.35 0.02 0.150.35 0.02 0.150.35 0.02 0.150.35 0.02 0.150.35D0.02Chromium 0.801.15 0.05 0.751.20 0.05 0.650.95 0.05 0.700.95 0.05 0.60
28、0.95 0.05Nickel . . . . . . . . . . . . 1.552.00 0.05 1.652.00 0.05 1.552.00 0.05Molybdenum 0.500.65 0.03 0.150.25 0.02 0.200.30 0.02 0.300.40 0.02 0.400.60 0.03Vanadium 0.250.35 0.03 . . . . . . . . . . . . . . . . . . 0.040.10 0.01AThe intentional addition of Bi, Se, Te, and Pb is not permitted.BU
29、nless otherwise specified, separate determinations may vary from the specified ranges, except that elements in any heat must not vary both above and below thespecified range.CPhosphorus and sulfur content is 0.04 % max when open-hearth steel is specified.DSilicon content is 0.35 % max if vacuum-carb
30、on deoxidized.A 540/A 540M 062TABLE 2 Mechanical Property RequirementsNOTE 1The minimum average of 3 specimens shall not be less than 35 ftlbf 47 J. One specimen from a set of 3 may be less than 35 ftlbf 47J but not less than 30 ftlbf 41 J.NOTE 2 The minimum average of 3 specimens shall not be less
31、than 30 ftlbf 41 J. One specimen from a set of 3 may be less than 30 ftlbf 41J but not less than 25 ftlbf 34 J.NOTE 3The minimum average of 3 specimens shall not be less than 25 ftlbf 34 J. One specimen from a set of 3 may be less than 25 ftlbf 34J but not less than 20 ftlbf 27 J.NOTE 4No minimum va
32、lues established. Tests shall be run for information only.Grade Class Diameter TensileStrength,minYieldStrength,0.2 %offset,minElonga-tion,min, %Reduc-tion ofArea,min, %SurfaceBrinellHardnessCharpyV-Notch+10 F12.2 Cmin maxInch-Pound Unitsin. ksi ksi In 2 in.B21 5 to 2, incl 120 105 15 50 241 285 Not
33、e 4(Cr-Mo-V) over 2 to 6, inclover 6 to 8, incl11511510010015155050248255302311Note 4Note 44 to 3, inclover 3 to 6, incl13513512012013134545269277331352Note 4Note 43 to 3, inclover 3 to 6, incl14514513013012124040293302352375Note 4Note 42 to 4, incl 155 140 11 40 311 401 Note 41 to 4, incl 165 150 1
34、0 35 321 429 Note 4B22 5 to 2, incl 120 105 15 50 248 293 Note 1(4142-H) over 2 to 4, incl 115 100 15 50 255 302 Note 44 to 1, inclover 1 to 4, incl13513512012013134545269277341363Note 1Note 43 to 2, inclover 2 to 4, incl14514513013012124040293302363375Note 4Note 42 to 3, incl 155 140 11 40 311 401
35、Note 41t112 , incl 165 150 10 35 321 401 Note 4B23(E-4340-H)5 to 6, inclover 6 to 8, inclover 8 to 912 , incl120115115105100100151515505050248255262311321321Note 1Note 1Note 44 to 3, inclover 3 to 6, inclover 6 to 912 , incl135135135120120120131313454545269277285341352363Note 1Note 1Note 43 to 3, in
36、clover 3 to 6, inclover 6 to 912 , incl145145145130130130121212404040293302311363375388Note 2Note 2Note 42 to 3, inclover 3 to 6, inclover 6 to 912 , incl155155155140140140111111404040311311321388401415Note 4Note 4Note 41 to 3, inclover 3 to 6, inclover 6 to 8, incl1651651651501501501010103535353213
37、31341415429444Note 4Note 4Note 4B24(4340 Mod.)5 to 6, inclover 6 to 8, inclover 8 to 912 , incl120115115105100100151515505050248255262311321321Note 1Note 1Note 14 to 3, incl 135 120 13 45 269 341 Note 1over 3 to 6, incl 135 120 13 45 277 352 Note 1over 6 to 8, incl 135 120 13 45 285 363 Note 1over 8
38、 to 912 , incl 135 120 13 45 293 363 Note 43 to 3, inclover 3 to 8, inclover 8 to 912 , incl145145145130130130121212404040293302311363388388Note 2Note 2Note 42 to 7, inclover 7 to 912 , incl15515514014011114040311321401415Note 2Note 41 to 6, inclover 6 to 8, incl16516515015010103535321331415429Note
39、3Note 4B24V(4340V Mod.)3 to 4, inclover 4 to 8, incl14514513013012124040293302363375Note 1Note 2over 8 to 11, incl 145 130 12 40 311 388 Note 32 to 4, inclover 4 to 8, inclover 8 to 11, incl155155155140140140111111404040311311321388401415Note 2Note 3Note 4A 540/A 540M 063TABLE 2 ContinuedGrade Class
40、 Diameter TensileStrength,minYieldStrength,0.2 %offset,minElonga-tion,min, %Reduc-tion ofArea,min, %SurfaceBrinellHardnessCharpyV-Notch+10 F12.2 Cmin max1 to 4, inclover 4 to 8, inclover 8 to 11, incl165165165150150150101010353535321331331415429444Note 3Note 4Note 4Metric Unitsmm MPa MPaIn 50mmB21(C
41、r-Mo-V)5 to 50, inclover 50 to 150, incl82579572569015155050241248285302Note 4Note 4over 150 to 205, incl 795 690 15 50 255 311 Note 44 to 75, inclover 75 to 150, incl93093082582513134545269277331352Note 4Note 43 to 75, inclover 75 to 150, incl1000100089589512124040293302352375Note 4Note 42 to 100,
42、incl 1070 965 11 40 311 401 Note 41 to 100, incl 1140 1035 10 35 321 429 Note 4B22(4142-H)5 to 50, inclover 50 to 100, incl82579572569015155050248255293302Note 1Note 44 to 25, inclover 25 to 100, incl93093082582513134545269277341363Note 1Note 43 to 50, inclover 50 to 100, incl10001000895895121240402
43、93302363375Note 4Note 421to 75, inclto 38, incl10701140965103511104035311321401401Note 4Note 4B23(E-4340-H)5 to 150, inclover 150 to 200 incl82579572569015155050248255311321Note 1Note 1over 200 to 240, incl 795 690 15 50 262 321 Note 44 to 75, inclover 75 to 150, inclover 150 to 240, incl93093093082
44、5825825131313454545269277285341352363Note 1Note 1Note 43 to 75, inclover 75 to 150, inclover 150 to 240, incl100010001000895895895121212404040293302311363375388Note 2Note 2Note 42 to 75, inclover 75 to 150, inclover 150 to 240, incl107010701070965965965111111404040311311321388401415Note 4Note 4Note
45、41 to 75, inclover 75 to 150, inclover 150 to 200, incl114011401140103510351035101010353535321331341415429444Note 4Note 4Note 4B24(4340 Mod.)5 to 150, inclover 150 to 200, inclover 200 to 240, incl825795795725690690151515505050248255262311321321Note 1Note 1Note 14 to 75, incl 930 825 13 45 269 341 N
46、ote 1over 75 to 150, incl 930 825 13 45 277 352 Note 1over 150 to 200, incl 930 825 13 45 285 363 Note 1over 200 to 240, incl 930 825 13 45 293 363 Note 43 to 75, inclover 75 to 200, incl1000100089589512124040293302363388Note 2Note 2over 200 to 240, incl 1000 895 12 40 311 388 Note 42 to 180, inclov
47、er 180 to 240, incl1070107096596511114040311321401415Note 2Note 41 to 150, inclover 150 to 200, incl114011401035103510103535321331415429Note 3Note 4B24V 3 to 100, incl 1000 895 12 40 293 363 Note 1(4340V Mod.) over 100 to 200, inclover 200 to 240, incl1000100089589512124040302311375388Note 2Note 32
48、to 100, inclover 100 to 200, inclover 200 to 280, incl107010701070965965965111111404040311311321388401415Note 2Note 3Note 41 to 100, inclover 100 to 200, inclover 200 to 280, incl114011401140103510351035101010353535321331331415429444Note 3Note 4Note 4A 540/A 540M 06411. Dimensions and Tolerances11.1
49、 Permissible Tolerances for Straightness:11.1.1 Annealed material shall have an out-of-straightnesstolerance of18 in. in any 5 ft or18 3 (number of feet oflength/5) in. 2mm/m.11.1.2 Quenched, tempered and stress-relieved materialshall have an out-of-straightness tolerance of14 in. in any 5 ftor14 3 (number of feet of length/5) in. 4 mm/m.11.2 Unless otherwise specified, headed bolts shall be semi-finished, hexagon in shape, and in accordance with the dimen-sions of ANSI B 18.2.1. Unles
