1、Designation:A29/A29M11a Designation: A29/A29M 12Standard Specification forSteel Bars, Carbon and Alloy, Hot-Wrought, GeneralRequirements for1This standard is issued under the fixed designation A29/A29M; the number immediately following the designation indicates the yearof original adoption or, in th
2、e case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript 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
3、 specification2covers a group of common requirements which, unless otherwise specified in the purchase order or inan individual specification, shall apply to carbon and alloy steel bars under each of the following ASTM specifications (or underany other ASTM specification which invokes this specifica
4、tion or portions thereof):Title of Specification ASTMDesignationAHot-Rolled Carbon Steel Bars:Steel Bars, Carbon, Quenched and Tempered A321Steel Bars and Shapes, Carbon Rolled from “T Rails A499Steel Bars, Carbon, Merchant Quality, M-Grades A575Steel Bars, Carbon, Hot-Wrought, Special Quality A576S
5、teel Bars, Carbon, Merchant Quality, MechanicalPropertiesA663/A663MSteel Bars, Carbon, Hot-Wrought, Special Quality, Me-chanical PropertiesA675/A675MSteel Bars for Springs, Carbon and Alloy A689Cold-Finished Carbon Steel Bars:Steel Bars, Carbon and Alloy, Cold-Finished A108Cold-Drawn Stress-Relieved
6、 Carbon Steel Bars Sub-ject to Mechanical Property RequirementsA311/A311MHot-Rolled Alloy Steel Bars:Steel Bars, Alloy, Standard Grades A322Carbon and Alloy Steel Bars Subject to End-QuenchHardenability RequirementsA304Steel Bars, Alloy, Hot-Wrought or Cold-Finished,Quenched and TemperedA434Steel Ba
7、rs, Alloy, Hot-Wrought, for Elevated Tempera-ture or Pressure-Containing Parts, or BothA739Cold-Finished Alloy Steel Bars:Steel Bars, Alloy, Hot-Rolled or Cold-Finished,Quenched and TemperedA434Steel Bars, Carbon, Hot-Wrought or Cold-Finished,Special Quality, for Pressure Piping ComponentsA696AThese
8、 designations refer to the latest issue of the respective specifications, which appear either in the Annual Book of ASTM Standards, Vol 01.05, or as reprintsobtainable from ASTM.1.2 In case of any conflict in requirements, the requirements of the purchase order, the individual material specification
9、, and thisgeneral 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. Within the text, the SI units are shownin brackets. The values stated in each system are not exact equivalents; therefore, each system must be
10、 used independently of theother. Combining values from the two systems may result in nonconformance with the specification.1.4 For purposes of determining conformance to this specification and the various material specifications referenced in 1.1,dimensional values shall be rounded to the nearest un
11、it in the right-hand place of figures used in expressing the limiting valuesin accordance with the rounding method of Practice E29.NOTE 1Specification A29 previously listed dimensional tolerances for cold-finished bars; these are now found in Specification A108.1This specification is under the juris
12、diction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.15on Bars.Current edition approved Oct.May 1, 2011.2012. Published October 2011.May 2012. Originally approved in 1957. Last previous edition approved in 2011asA29/A29M 11a.
13、 DOI: 10.1520/A0029_A0029M-11A2.2For ASME Boiler and Pressure Vessel Code applications see related Specification SA-29/SA-29M in Section II of that Code.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to
14、 the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summa
15、ry 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.2. Referenced Documents2.1 ASTM Standards:3A108 Specification for Steel Bar, Carbon and Alloy, Cold-FinishedA304 Specification f
16、or Carbon and Alloy Steel Bars Subject to End-Quench Hardenability RequirementsA311/A311M Specification for Cold-Drawn, Stress-Relieved Carbon Steel Bars Subject to Mechanical Property RequirementsA321 Specification for Steel Bars, Carbon, Quenched and TemperedA322 Specification for Steel Bars, Allo
17、y, Standard GradesA370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA434 Specification for Steel Bars, Alloy, Hot-Wrought or Cold-Finished, Quenched and TemperedA499 Specification for Steel Bars and Shapes, Carbon Rolled from T RailsA575 Specification for Steel Bars, Carbon,
18、Merchant Quality, M-GradesA576 Specification for Steel Bars, Carbon, Hot-Wrought, Special QualityA663/A663M Specification for Steel Bars, Carbon, Merchant Quality, Mechanical PropertiesA675/A675M Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality, Mechanical PropertiesA689 Specificat
19、ion for Carbon and Alloy Steel Bars for SpringsA696 Specification for Steel Bars, Carbon, Hot-Wrought or Cold-Finished, Special Quality, for Pressure Piping ComponentsA700 Practices for Packaging, Marking, and Loading Methods for Steel Products for ShipmentA739 Specification for Steel Bars, Alloy, H
20、ot-Wrought, for Elevated Temperature or Pressure-Containing Parts, or BothA751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE112 Test Methods for Determining Average
21、Grain Size2.2 Federal Standards:4Fed. Std. No. 123 Marking for Shipment (Civil Agencies)Fed. Std. No. 183 Continuous Identification Marking of Iron and Steel Products2.3 Military Standard:4MIL-STD-163 Steel Mill ProductsPreparation for Shipment and Storage2.4 Other Standards:AIAG B-1 Bar Code Symbol
22、ogy Standard for 3-of-9 Bar Codes5AIAG B-5 02.00 Primary Metals Tag Application Standard53. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 Hot-Wrought Steel BarsSteel bars produced by hot forming ingots, blooms, billets, or other semifinished forms to yieldstraight lengths (or c
23、oils, depending upon size, section, and mill equipment) in sections that are uniform throughout their length,and in the following sections and sizes:3.1.1.1 Rounds732 to 10.0 in. 5.5 to 250 mm, inclusive,3.1.1.2 Squares732 to 6.0 in. 6 to 160 mm, inclusive,3.1.1.3 Round-Cornered Squares732 to 8.0 in
24、. 6 to 200 mm, inclusive,3.1.1.4 Flats14 to 8 in. inclusive, in width:1364 in. in minimum thickness up to 6 in. in width; and 0.230 in. in minimumthickness for over 6 to 8 in. in width, inclusive over 5 mm in thickness up to 150 mm in width; and over 6 mm in thickness forover 150 mm through 200 mm i
25、n width. Maximum thickness for all widths is 4 in. 100 mm.3.1.1.5 Hexagons and Octagons14 to 4116 in. 6 to 103 mm, inclusive, between parallel surfaces,3.1.1.6 Bar Size ShapesAngles, channels, tees, zees, when their greatest cross-sectional dimension is under 3 in. 75 mm,and3.1.1.7 Special Bar Secti
26、onsHalf-rounds, ovals, half-ovals, other special bar size sections.3.1.2 Cold-Finished Steel BarsSteel bars produced by cold finishing previously hot-wrought bars by means of cold drawing,cold forming, turning, grinding, or polishing (singly or in combination) to yield straight lengths or coils in s
27、ections that are uniformthroughout their length and in the following sections and sizes:3.1.2.1 Rounds9 in. 230 mm and under in diameter,3.1.2.2 Squares6 in. 150 mm and under between parallel surfaces,3.1.2.3 Hexagons4 in. 100 mm and under between parallel surfaces,3.1.2.4 Flats18 in. 3 mm and over
28、in thickness and not over 12 in. 300 mm in width, and3For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. ForAnnual Book ofASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.4Copies of
29、military specifications, military standards, and federal standards required by contractors in connection with specific procurement functions should be obtainedfrom the procuring activity or as directed by the contracting officer, or from the Standardization Documents Order Desk, Bldg. 4 Section D, 7
30、00 Robbins Ave., Philadelphia,PA 19111-5094, Attn: NPODS.5Available from Automotive Industry Action Group, North Park Plaza, Ste. 830, 17117 W. Nine Mile Rd., Southfield, MI 48075.A29/A29M 1223.1.2.5 Special Bar Sections.3.1.3 LotUnless otherwise specified in the contract or order, a lot shall consi
31、st of all bars submitted for inspection at the sametime of the same heat, condition, finish, size, or shape. For bars specified in the quenched and tempered condition, when heattreated in batch-type furnaces, a lot shall consist of all bars from the same heat, of the same prior condition, the same s
32、ize, andsubjected to the same heat treatment in one tempering charge. For bars specified in the quenched and tempered condition, whenheat treated without interruption in a continuous-type furnace, a lot shall consist of all bars from the same heat, of the same priorcondition, of the same size, and s
33、ubjected to the same heat treatment.4. Chemical Composition4.1 Limits:4.1.1 The chemical composition shall conform to the requirements specified in the purchase order or the individual productspecifications. For convenience the grades commonly specified for carbon steel bars are shown in Tables 1 an
34、d 2. Bars may beordered to these grade designations and when so ordered shall conform to the specified limits by heat analysis.4.1.2 When compositions other than those shown in Tables 1 and 2 are required, the composition limits shall be prepared usingthe ranges and limits shown in Table 3 for carbo
35、n steel and Table 4 for alloy steel.4.2 Heat or Cast Analysis:4.2.1 The chemical composition of each heat or cast shall be determined by the manufacturer in accordance with Test Methods,Practices, and Terminology A751.4.2.2 The heat or cast analysis shall conform to the requirements specified in the
36、 product specification or purchase order. Thesecan be the heat chemical range and limit for a grade designated in Tables 1 and 2, or another range and limit in accordance with4.1.2, or with requirements of the product specification.NOTE 2Heat analysis for lead is not determinable since lead is added
37、 to the ladle stream while each ingot is poured. When specified as an addedelement to a standard steel, the percentage of lead is reported as 0.15 to 0.35 incl, which is the range commonly specified for this element.4.2.3 If requested or required, the heat analysis shall be reported to the purchaser
38、 or his representative.4.2.4 Reporting of significant figures and rounding shall be in accordance with Test Methods, Practices, and TerminologyA751.4.3 Product Analysis:4.3.1 Merchant quality carbon bar steel is not subject to rejection for product analysis unless misapplication of a heat is clearly
39、indicated.4.3.2 Analyses may be made by the purchaser from finished bars other than merchant quality representing each heat ofopen-hearth, basic-oxygen, or electric-furnace steel. The chemical composition thus determined shall not vary from the limitsspecified in the applicable specification by more
40、 than the amounts prescribed in Table 5 and Table 6, but the several determinationsof any element, excluding lead, in a heat may not vary both above and below the specified range. Rimmed or capped steel ischaracterized by a lack of homogeneity in its composition, especially for the elements carbon,
41、phosphorus, and sulfur; therefore,when rimmed or capped steel is specified or required, the limitations for these elements shall not be applicable. Because of thedegree to which phosphorus and sulfur segregate, the limitations for these elements shall not be applicable to rephosphorized orresulfuriz
42、ed steels.4.3.3 Samples for product analysis shall be taken by one of the following methods:4.3.3.1 Applicable to small sections whose cross-sectional area does not exceed 0.75 in.2500 mm2 such as rounds, squares,hexagons, and the like. Chips are taken by milling or machining the full cross section
43、of the piece. Drilling is not a feasible methodfor sampling sizes 0.75 in.2and smaller.4.3.3.2 Applicable to products where the width of the cross section greatly exceeds the thickness, such as bar size shapes andlight flat bars. Chips are taken by drilling entirely through the steel at a point midw
44、ay between the edge and the middle of thesection, or by milling or machining the entire cross section.4.3.3.3 Applicable to large rounds, squares semifinished, etc. Chips are taken at any point midway between the outside and thecenter of the piece by drilling parallel to the axis or by milling or ma
45、chining the full cross section. In cases where these methodsare not practicable, the piece may be drilled on the side, but chips are not taken until they represent the portion midway betweenthe outside and the center.4.3.3.4 When the steel is subject to tension test requirements, the tension test sp
46、ecimen can also be used for product analysis.In that case, chips for product analysis can be taken by drilling entirely through the tension test specimens or by the methoddescribed in 4.3.3.1.4.3.4 When chips are taken by drilling, the diameter of the drill used shall conform to the following:Area o
47、f Sample Cross Section,in.2(cm2)Approximate Drill Diameter,in. (mm)16 100 or less12 12.5Over 16 100 1 25.04.3.5 The minimum number of samples to be taken from material representing the same heat or lot before rejection by thepurchaser shall be as follows:A29/A29M 123TABLE 1 Grade Designations and Ch
48、emical Compositions of Carbon Steel BarsGrade DesignationHeat Chemical Ranges and Limits, %Carbon Manganese Phosphorus, max Sulfur, maxANonresulfurized Carbon SteelsB,C,D,E,F1005 0.06 max 0.35 max 0.040 0.0501006 0.08 max 0.250.40 0.040 0.0501008 0.10 max 0.300.50 0.040 0.0501010 0.080.13 0.300.60 0
49、.040 0.0501011 0.080.13 0.600.90 0.040 0.0501012 0.100.15 0.300.60 0.040 0.0501013 0.110.16 0.500.80 0.040 0.0501015 0.130.18 0.300.60 0.040 0.0501016 0.130.18 0.600.90 0.040 0.0501017 0.150.20 0.300.60 0.040 0.0501018 0.150.20 0.600.90 0.040 0.0501019 0.150.20 0.701.00 0.040 0.0501020 0.180.23 0.300.60 0.040 0.0501021 0.180.23 0.600.90 0.040 0.0501022 0.180.23 0.701.00 0.040 0.0501023 0.200.25 0.300.60 0.040 0.0501025 0.220.28 0.300.60 0.040 0.0501026 0.220.28 0.600.90 0.040 0.0501029
