Standard Specification For Steel Bars, Carbon And Alloy .

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Designation: A 29/A 29M – 04Standard Specification forSteel Bars, Carbon and Alloy, Hot-Wrought, GeneralRequirements for1This standard is issued under the fixed designation A 29/A 29M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year 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.This standard has been approved for use by agencies of the Department of Defense.1.3 The values stated in inch-pound units or SI units are tobe regarded as the standard. Within the text, the SI units areshown in brackets. The values stated in each system are notexact equivalents; therefore, each system must be used independently of the other. Combining values from the two systemsmay result in nonconformance with the specification.1.4 For purposes of determining conformance to this specification and the various material specifications referenced in1.1, dimensional values shall be rounded to the nearest unit inthe right-hand place of figures used in expressing the limitingvalues in accordance with the rounding method of PracticeE 29.1. Scope*1.1 This specification2 covers a group of common requirements which, unless otherwise specified in the purchase orderor in an individual specification, shall apply to carbon and alloysteel bars under each of the following ASTM specifications (orunder any other ASTM specification which invokes thisspecification or portions thereof):Title of SpecificationASTMDesignationAHot-Rolled Carbon Steel Bars:Steel Bars, Carbon, Quenched and TemperedSteel Bars and Shapes, Carbon Rolled from “T’’ RailsSteel Bars, Carbon, Merchant Quality, M-GradesSteel Bars, Carbon, Hot-Wrought, Special QualitySteel Bars, Carbon, Merchant Quality, MechanicalPropertiesSteel Bars, Carbon, Hot-Wrought, Special Quality, Mechanical PropertiesSteel Bars for Springs, Carbon and AlloyCold-Finished Carbon Steel Bars:Steel Bars, Carbon, Cold-Finished, Standard QualityStress-Relieved Steel Bars Subject to MechanicalProperty Requirements, Cold-Drawn CarbonHot-Rolled Alloy Steel Bars:Steel Bars, Alloy, Standard GradesSteel Bars, Alloy, Subject to End-Quench HardenabilityRequirementsSteel Bars, Alloy, Hot-Wrought or Cold-Finished,Quenched and TemperedSteel Bars, Alloy, Hot-Wrought, for Elevated Temperature or Pressure-Containing Parts, or BothCold-Finished Alloy Steel Bars:Steel Bars, Alloy, Hot-Rolled or Cold-Finished,Quenched and TemperedSteel Bars, Carbon, Hot-Wrought or Cold-Finished,Special Quality, for Pressure Piping ComponentsA 321A 499A 575A 576A 663NOTE 1—Specification A 29 previously listed dimensional tolerancesfor cold-finished bars; these are now found in Specification A 108.A 6752. Referenced Documents2.1 ASTM Standards: 3A 108 Specification for Steel Bars, Carbon, Cold-Finished,Standard QualityA 304 Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability RequirementsA 311 Specification for Cold-Drawn, Stress-Relieved Carbon Steel Bars Subject to Mechanical Property RequirementsA 321 Specification for Steel Bars, Carbon, Quenched andTemperedA 322 Specfication for Steel Bars, Alloy, Standard GradesA 331 Specification for Steel Bars, Alloy, Cold-FinishedA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 434 Specification for Steel Bars, Alloy, Hot-Wrought orCold-Finished, Quenched and TemperedA 499 Specification for Steel Bars and Shapes, CarbonRolled from “T” RailsA 575 Specification for Steel Bars, Carbon, Merchant Quality, M-GradeA 689A 108A 311/A 311MA 322A 304A 434A 739A 434A 696AThese designations refer to the latest issue of the respective specifications,which appear either in the Annual Book of ASTM Standards, Vol 01.05, or asreprints obtainable from ASTM.1.2 In case of any conflict in requirements, the requirementsof the purchase order, the individual material specification, andthis general specification shall prevail in the sequence named.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.15 on Bars.Current edition approved March 1, 2004. Published April 2004. Originallyapproved in 1957. Last previous edition approved in 2003 as A 29/A 29M–03.2For ASME Boiler and Pressure Vessel Code applications see related Specification SA-29/SA-29M in Section II of that Code.3For referenced ASTM standards, visit the ASTM website,, orcontact ASTM Customer Service at For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe ASTM website.*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.1

A 29/A 29M – 04yield straight lengths (or coils, depending upon size, section,and mill equipment) in sections which are uniform throughouttheir length, and in the following sections and sizes: Rounds, 7 32 to 10.0 in. [5.5 to 250 mm], inclusive, Squares, 7 32 to 6.0 in. [6 to 160 mm], inclusive, Round-Cornered Squares, 7 32 to 8.0 in. [6 to 200mm], inclusive, Flats, 1 4 to 8 in. inclusive, in width: 13 64 in. inminimum thickness up to 6 in. in width; and 0.230 in. inminimum thickness for over 6 to 8 in. in width, inclusive [over5 mm in thickness up to 150 mm in width; and over 6 mm inthickness for over 150 mm through 200 mm in width].Maximum thickness for all widths is 4 in. [100 mm]. Hexagons and Octagons, 1 4 to 41 16 in. [6 to 103mm], inclusive, between parallel surfaces, Bar Size Shapes—Angles, channels, tees, zees,when their greatest cross-sectional dimension is under 3 in. [75mm], and3.1.1.7 Special Bar Sections—Half-rounds, ovals, halfovals, other special bar size sections.3.1.2 Cold-Finished Steel Bars—Steel bars produced bycold finishing previously hot-wrought bars by means of colddrawing, cold forming, turning, grinding, or polishing (singlyor in combination) to yield straight lengths or coils in sectionswhich are uniform throughout their length and in the followingsections and sizes: Rounds, 9 in. [230 mm] and under in diameter, Squares, 6 in. [150 mm] and under between parallelsurfaces, Hexagons, 4 in. [100 mm] and under betweenparallel surfaces, Flats, 1 8 in. [3 mm] and over in thickness and notover 12 in. [300 mm] in width, and3.1.2.5 Special Bar Sections.3.1.3 Lot—Unless otherwise specified in the contract ororder, a lot shall consist of all bars submitted for inspection atthe same time of the same heat, condition, finish, size, or shape.For bars specified in the quenched and tempered condition,when heat treated in batch-type furnaces, a lot shall consist ofall bars from the same heat, of the same prior condition, thesame size, and subjected to the same heat treatment in onetempering charge. For bars specified in the quenched andtempered condition, when heat treated without interruption in acontinuous-type furnace, a lot shall consist of all bars from thesame heat, of the same prior condition, of the same size, andsubjected to the same heat treatment.A 576 Specification for Steel Bars, Carbon, Hot-Wrought,Special QualityA 663 Specification for Steel Bars, Carbon, Merchant Quality, Mechanical PropertiesA 675 Specification for Steel Bars, Carbon, Hot-Wrought,Special Quality, Mechanical PropertiesA 689 Specification for Carbon and Alloy Steel Bars forSpringsA 695 Specification for Steel Bars, Carbon, Hot-Wrought,Special Quality, for Fluid Power Applications4A 696 Specification for Steel Bars, Carbon, Hot-Wrought orCold-Finished, Special Quality for Pressure Piping ComponentsA 700 Practices for Packaging, Marking, and LoadingMethods for Steel Products for Domestic ShipmentA 739 Specification for Steel Bars, Alloy, Hot-Wrought, forElevated Temperature or Pressure-Containing Parts, orBothA 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel ProductsE 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 112 Test Methods for Determining the Average GrainSize2.2 Federal Standards:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)5Fed. Std. No. 183 Continuous Identification Marking ofIron and Steel Products52.3 Military Standard:MIL-STD-163 Steel Mill Products—Preparation for Shipment and Storage52.4 Other Standards:AIAG B-1 Bar Code Symbology Standard for 3-of-9 BarCodes6AIAGB-5 02.00 Primary Metals Tag Application Standard63. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 Hot-Wrought Steel Bars—Steel bars produced by hotforming ingots, blooms, billets, or other semifinished forms to4Withdrawn.Copies of military specifications, military standards, and federal standardsrequired by contractors in connection with specific procurement functions should beobtained from the procuring activity or as directed by the contracting officer, or fromthe Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave.,Philadelphia, PA 19111-5094, Attn: NPODS.6Available from Automotive Industry Action Group, North Park Plaza, Ste. 830,17117 W. Nine Mile Rd., Southfield, MI 48075.5TABLE 1 Grade Designations and Chemical Compositions of Carbon Steel BarsHeat Chemical Ranges and Limits, %Grade DesignationCarbonManganeseNonresulfurized Carbon Steels100510061008101010110.06 max0.08 max0.10 max0.08–0.130.08–0.130.35 osphorus, maxSulfur, .050B,C,D,E,F

A 29/A 29M – 04TABLE 1 ContinuedHeat Chemical Ranges and Limits, %Grade ganesePhosphorus, maxSulfur, Resulfurized Carbon 1.000.70–1.000.70–1.00Rephosphorized and Resulfurized Carbon SteelsD,G,FGrade 330.26––0.350.15–0.353

A 29/A 29M – 04TABLE 1 ContinuedRephosphorized and Resulfurized Carbon SteelsD,G,FGrade ad0.09 h-Manganese Carbon 5661572Heat Chemical Ranges and Limits, percentMerchant Quality M Series Carbon Steel xSulfur, max0.10 unless otherwise indicated.When silicon is required, the following ranges and limits are commonly specified: 0.10 %, max, 0.10 % to 0.20 %, 0.15 % to 0.35 %, 0.20 % to 0.40 %, or 0.30 % to0.60 %.CCopper can be specified when required as 0.20 % minimum.DWhen lead is required as an added element to a standard steel, a range of 0.15 to 0.35 % inclusive is specified. Such a steel is identified by inserting the letter “L”

which appear either in the Annual Book of ASTM Standards, Vol 01.05, or as reprints obtainable from ASTM. 1.2 In case of any conflict in requirements, the requirements of the purchase order, the individual material specification, and this general specification shall prevail in the sequence named. 1.3 The values stated in inch-pound units or SI units are to be regarded as the standard .

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