1、Designation: A108 07A108 13Standard Specification forSteel Bar, Carbon and Alloy, Cold-Finished1This standard is issued under the fixed designation A108; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、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 Department of Defense.1. Scope*1.1 This specification covers cold-finished carbon and al
3、loy steel bars produced in straight length and coil to chemicalcompositions. Cold-finished bars are suitable for heat treatment, for machining into components, or for use in the as-finishedcondition as shafting, or in constructional applications, or for other similar purposes (Note 1). Grades of ste
4、el are identified bygrade numbers or by chemical composition.NOTE 1A guide for the selection of steel bars is contained in Practice A400.1.2 Some end uses may require one or more of the available designations shown under Supplementary Requirements.Supplementary requirements shall apply only when spe
5、cified individually by the purchaser.1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for informationonly.mathematical conversions to SI units that are provided for information only and are not considered standard.2. Referenced Documen
6、ts2.1 ASTM Standards:2A29/A29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements forA304 Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability RequirementsA322 Specification for Steel Bars, Alloy, Standard GradesA370 Test Methods and Defini
7、tions for Mechanical Testing of Steel ProductsA400 Practice for Steel Bars, Selection Guide, Composition, and Mechanical PropertiesA510A510/A510M Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel, and AlloySteelA576 Specification for Steel Bars, Carbon, Hot-Wro
8、ught, Special Quality2.2 Other Documents:SAE Handbook and SAE J1086 Recommended Practice for Numbering Metals and Alloys (UNS)3ISSAIST Steel Bar Steels: Steel Product Guidelines Manual43. Terminology3.1 Definitions:3.1.1 product tolerance levelscold-finished steel bar is produced with up to four (4)
9、three (3) increasingly tight tolerancelevels, for the individual product characteristics, dependent on the method of manufacture necessary to meet purchaser-orderedspecification requirements. (Product Tolerance Level 1 is selected, unless otherwise specified by purchaser.)4. Ordering Information4.1
10、Orders for cold-finished steel bar to this specification should include the following items to adequately describe the material:4.1.1 Name of material,1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of S
11、ubcommittee A01.15on Bars.Current edition approved Sept. 1, 2007Aug. 15, 2013. Published September 2007August 2013. Originally approved in 1926. Last previous edition approved in 20032007as A108 03A108 07.1. DOI: 10.1520/A0108-07.10.1520/A0108-13.2 For referencedASTM standards, visit theASTM website
12、, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from Society of Automotive Engineers SAE International (SAE), 400 Commonwealth Dr., Warrendale, PA 150
13、96-0001.15096-0001, http:/www.sae.org.4 Available from ISS Customer Service, 410 Commonwealth Drive, Warrendale, PA, 15086.Association for Iron ASTM A108, dated _; SAE ASTM Steel Grade - 1117; Coarse Grain; ColdDrawn; 1.500-in. (38.10 mm) (38.10-mm) diameter round; 12 ft (3657.61 mm) long; Heat Anal
14、ysis Required; Precision Machined Parts.NOTE 3A more complex ordering description is as follows: Steel Bar; ASTM A108, dated _; SAE ASTM Steel Grade - 1045; Fine Grain; ColdDrawn, Turned, Ground and Polished; chamfer both ends; Mechanical Property Test Results; Hardness test; 2.000-in. (50.80 mm) (5
15、0.80-mm) diameterround; 12 ft (3657.61 mm) long; Heat Analysis Required; Precision Machined Parts. Product codes allow you to abbreviate, yet identify a complexordering description in the following simplified description: Steel Bar: ASTM A108, dated _; SAE 1045; Fine Grain; 2.000-in. (50.80 mm) diam
16、eterround; 12 ft (3657.61 mm) long; Heat Analysis Required; Precision Machined Parts.5. General Requirements5.1 Material furnished under this specification shall conform to the applicable requirements of the current edition ofSpecification A29/A29M.6. Materials and Manufacture6.1 FeedstockCold-finis
17、hed steel bar shall be produced from hot-wrought carbon or alloy steel bar (Specification A29/A29M),or from hot-wrought rod designated for cold-finished bar (Specification A510A510/A510M).6.2 ConditionThe product shall be furnished in one of the following conditions as specified by the purchaser.6.2
18、.1 Rounds:6.2.1.1 Cold drawn,6.2.1.2 Cold drawn, turned, and polished,6.2.1.3 Cold drawn, ground, and polished,6.2.1.4 Cold drawn, turned, ground, and polished,6.2.1.5 Cold drawn, turned, and ground,6.2.1.6 Hot wrought, turned, and polished,6.2.1.7 Hot wrought, turned, ground and polished,6.2.1.8 Ho
19、t wrought, turned, and ground, and6.2.1.9 Hot wrought, rough turned.6.2.2 Squares, Hexagons:6.2.2.1 Cold drawn, and6.2.2.2 Cold rolled.6.2.3 Flats:6.2.3.1 Cold drawn, and6.2.3.2 Cold rolled.6.2.4 Special Bar Sections:6.2.4.1 Cold drawn, and6.2.4.2 Cold rolled.6.3 Heat Treatment:6.3.1 Unless otherwis
20、e specified, the bars shall be furnished as cold-finished. Plain Carbon Steels with a maximum carbon over0.55 % and Alloy Steels with a maximum carbon over 0.38 % shall be annealed prior to cold finishing.6.3.2 The following heat-treatment processes may be performed singularly or in combination:6.3.
21、2.1 Annealed,6.3.2.2 Normalized,6.3.2.3 Stress relieved, and6.3.2.4 Quenched and tempered.7. Chemical Composition7.1 Chemical Composition:7.1.1 The chemical analysis of the steel shall conform to that specified in Specification A29/A29M for the steel grade ordered,or to such other limits as may be s
22、pecified using the standard ranges in Specification A29/A29M.A108 1327.1.2 Steels may be selected from: Specifications A29/A29M, A304, A322, A510A510/A510M, and A576; the SAE Handbook;or the ISS Steel Bar Product Guideline for Bar Steel.AIST Bar Steels: Steel Product Manual.7.1.3 When a steels compo
23、sition cannot be identified by a standard grade number in accordance with 7.1.1 and 7.1.2, the limitsfor each required element may be specified using the chemical ranges shown in the table (Heat Analysis Chemical Ranges andLimits of Carbon Steel Bars) of Specification A29/A29M.8. Tolerance Levels8.1
24、 Cold-Finished BarsThe permissible dimensional variations for cold-finished carbon and alloy steel bar shall not exceedthe applicable tolerance levels or limits stated in Annex A1 for inch-pound values.9. Workmanship, Finish, and Product Presentation9.1 Workmanship:9.1.1 Within the limits of good ma
25、nufacturing and inspection practices, the bars shall be free of injurious imperfections which,due to their nature, degree, or extent, will interfere with the use of the material in machining or fabrication of suitable parts.9.1.2 Table A1.8 contains the recommended minimum stock removal to ensure (p
26、er side of bar) to assist in the removal ofsurface discontinuities in cold finished or hot rolled bars.9.2 Finish:9.2.1 Unless otherwise specified, the bars shall have a commercial bright smooth surface finish, obtained by conventionalcold-finishing operations such as cold drawing or cold rolling.9.
27、2.2 When a superior bar surface finish is required, bars may be obtained as: turned and polished, ground and polished, orturned, ground, and polished. (Reference Table A1.7)9.2.3 Bars that are thermally treated after cold finishing may exhibit a discolored or oxidized surface.9.2.4 When diameter tol
28、erances for round bars are more restrictive than commercial standard size tolerances listed in TableA1.1or Table A1.2, then refer to Table A1.3 size tolerances attained from the Grinding and Polished operation.9.3 Product Presentation:9.3.1 The bars shall be given a surface coating of oil or other r
29、ust inhibitor to protect against corrosion during shipment.9.3.2 The bar bundles shall be identified, packaged and loaded to preserve the physical appearance, product tolerance andidentity of the cold-finished product, as agreed upon between the purchaser and supplier. supplier, at time of order acc
30、eptance.NOTE 4Steel bar or machined bar surface is a perishable quality condition and may be altered by mis-handling or detrimental exposure to moistureor corrosive conditions. The preservation of surface quality requires the utmost care in subsequent customer handling, storage, or processing. Rustp
31、reventive oils are necessary to coat and provide a barrier to displace harmful moisture or corrosive conditions to prevent rust.10. Certification10.1 Upon request of the purchaser in the contract or order, a manufacturers certification that the material was manufacturedand tested in accordance with
32、this specification together with a report of the test results shall be furnished at the time of shipment.11. Keywords11.1 alloy steel; carbon steel; cold-finished; steel barbar; turned barSUPPLEMENTARY REQUIREMENTSOne or more of the following supplementary requirements shall be applied only when spe
33、cified bythe purchaser in the inquiry, contract, or order. Details of these supplementary requirements shall beagreed upon in writing, by the manufacturer and the purchaser. Supplementary requirements shall inno way negate any requirement of the specification itself.S1. Hot Rolling Reduction RatioS1
34、.1 When required, purchaser may require the supplier to report the reduction ratio of the initial Bloom/Billet cross sectionalarea to finished hot rolled cross sectional area.A108 133S2. Steel Melting ProcessS2.1 When required, purchaser may require the supplier to report the steel melting process (
35、Basic Oxygen Furnace, ElectricArcFurnace, etc.) for each initial heat/lot number supplied to the purchaser.S3. Steel Refinement ProcessS3.1 When required, purchaser may require the supplier to report the steel refinement processes performed after melting andbefore casting (Vacuumed Degassed, etc.) o
36、n the heat/lot number supplied to the purchaser.S4. Continuous Casting ProcessS4.1 When required, purchaser may require the supplier to report the casting process (Bloom, Billet, etc.) for each heat/lotnumber supplied to the purchaser.S5. Country or Countries of OriginS5.1 When required, purchaser m
37、ay require the supplier to report the country of origin where the steel was melted for eachheat/lot number supplied to the purchaser.S5.2 When required, purchaser may require the supplier to report the country of origin where the steel was hot rolled for eachheat/lot number supplied to the purchaser
38、.S5.3 When required, purchaser may require the supplier to report the country of origin where the steel was cold finished foreach heat/lot number supplied to the purchaser.S6. Mechanical PropertiesS6.1 When required, at time of inquiry or purchase, purchaser may require the supplier to report the co
39、ld-finished steel barmechanical properties for each heat/lot number supplied to the purchaser. Mechanical properties shall be evaluated in accordancewith Test Methods and Definitions in Test Methods A370.S7. Surface InspectionS7.1 When required, at time of inquiry or purchase, purchaser may require
40、the supplier to inspect the cold finish steel bar surfacewithin an electromagnetica non-destructive surface inspection process to detect and sort assist in the detection of most surfacediscontinuities that exceed the maximum allowed depth tolerances listed in Table A1.8 or other tolerances agreed up
41、on betweenthe purchaser and supplier. Non-destructive surface inspection process has limitations and will not guarantee or warranty 100 %detection of all surface discontinuities in a steel bar.S8. Bar MarkingS8.1 When required, bar marking specification requirements shall be agreed upon between the
42、purchaser and supplier.A108 134ANNEX(Mandatory Information)A1. PERMISSIBLE VARIATIONS IN QUALITY CHARACTERISTICSINCH-POUND AND METRIC UNITSA108 135TABLE A1.1 Size Tolerances for Level One Cold-Finished Carbon Steel Bars, Cold DrawnA or Turned and PolishedASize, in. (mm)ABMaximum ofCarbon Range0.28 %
43、 or lessMaximum of Carbon Rangeover 0.28 % to 0.55 % inclMaximum of Carbon Rangeto 0.55 % incl,Stress Relieved or Annealedafter Cold FinishingMaximum of Carbon Rangeover 0.55 % or All GradesQuenched and Tempered orNormalized and Temperedbefore or after Cold FinishingAll tolerances are in inches (mm)
44、 and are minusBCRoundsCold DrawnC to 6 in.(152.4 mm) or Turned and PolishedRoundsCold DrawnD to 6 in. (152.4 mm) or Turned and PolishedTo 112 (38.1) incl, in coils, or cut lengths 0.002 (.051) 0.003 (.076) 0.004 (.102) 0.005 (.127)To 112 (38.1) incl, in coils, or cut lengths 0.002 (.051) 0.003 (.076
45、) 0.004 (.102) 0.005 (.127)Over 112 (38.10) to 212 (63.50) incl 0.003 (.076) 0.004 (.102) 0.005 (.127) 0.006 (.152)Over 112 (38.10) to 212 (63.50) incl 0.003 (.076) 0.004 (.102) 0.005 (.127) 0.006 (.152)Over 212 (63.50) to 4 (101.60) incl 0.004 (.102) 0.005 (.127) 0.006 (.152) 0.007 (.178)Over 212 (
46、63.50) to 4 (101.60) incl 0.004 (.102) 0.005 (.127) 0.006 (.152) 0.007 (.178)Over 4 (101.60) to 6 (152.40) incl 0.005 (.127) 0.006 (.152) 0.007 (.178) 0.008 (.203)Over 4 (101.60) to 6 (152.40) incl 0.005 (.127) 0.006 (.152) 0.007 (.178) 0.008 (.203)Over 6 (152.40) to 8 (203.20) incl 0.006 (.152) 0.0
47、07 (.178) 0.008 (.203) 0.009 (.229)Over 6 (152.40) to 8 (203.20) incl 0.006 (.152) 0.007 (.178) 0.008 (.203) 0.009 (.229)Over 8 (203.20) to 9 (228.60) incl 0.007 (.178) 0.008 (.203) 0.009 (.229) 0.010 (.254)Over 8 (203.20) to 9 (228.60) incl 0.007 (.178) 0.008 (.203) 0.009 (.229) 0.010 (.254)Hexagon
48、sTo 34 (19.05) incl 0.002 (.051) 0.003 (.076) 0.004 (.102) 0.006 (.152)To 34 (19.05) incl 0.002 (.051) 0.003 (.076) 0.004 (.102) 0.006 (.152)Over 34 (19.05) to 112 (38.10) incl 0.003 (.076) 0.004 (.102) 0.005 (.127) 0.007 (.178)Over 34 (19.05) to 112 (38.10) incl 0.003 (.076) 0.004 (.102) 0.005 (.12
49、7) 0.007 (.178)Over 112 (38.10) to 212 (63.50) incl 0.004 (.102) 0.005 (.127) 0.006 (.152) 0.008 (.203)Over 112 (38.10) to 212 (63.50) incl 0.004 (.102) 0.005 (.127) 0.006 (.152) 0.008 (.203)Over 212 (63.50) to 318 (79.38) incl 0.005 (.127) 0.006 (.152) 0.007 (.178) 0.009 (.229)Over 212 (63.50) to 318 (79.38) incl 0.005 (.127) 0.006 (.152) 0.007 (.178) 0.009 (.229)Over 318 (79.38) to 4 (101.60) incl 0.005 (.127) 0.006 (.152) . . . . . .Over 318 (79.38) to 4 (101.60) incl 0.005 (.127) 0.006 (.152) . . . . . .SquaresTo 34 (19.05
