1、Designation: A 749/A749M 97 (Reapproved 2002)Standard Specification forSteel, Strip, Carbon and High-Strength, Low-Alloy, Hot-Rolled, General Requirements for1This standard is issued under the fixed designation A 749/A749M; the number immediately following the designation indicates the yearof origin
2、al 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 Def
3、ense.1. Scope1.1 This specification covers the general requirements forhot-rolled steel strip in coils and cut lengths. It applies tocarbon steel and high-strength, low-alloy steel furnished ashot-rolled.1.2 This specification is not applicable to hot-rolled heavy-thickness carbon sheet and strip co
4、ils (ASTM SpecificationA 635/A 635M), cold-rolled carbon steel strip (ASTM Speci-fication A 109 or A 109M), high-strength, low-alloy cold-rolled steel (ASTM Specifications A 606 and A 607) or cold-rolled carbon spring steel (ASTM Specification A 682 orA 682M).1.3 In case of any conflict in requireme
5、nts, the requirementsof the individual material specification shall prevail over thoseof this general specification.1.4 For the purposes of determining conformance with thisand the appropriate product specification referenced under 2.1,values shall be rounded to the nearest unit in the right handpla
6、ce of figures used in expressing the limiting values inaccordance with the rounding method of Practice E 29.1.5 Annex A1 lists permissible variations in dimensions andmass (Note 1) in SI metric units. The values listed are notexact conversions of the values listed in the inch-pound tables,but instea
7、d are rounded or rationalized values. Conformance toAnnex A1 is mandatory when the “M” specification is used.NOTE 1The term “weight” is used when inch-pound units are thestandard; however, under SI, the preferred term is “mass.”1.6 The values stated in either inch-pound units or SI unitsare to be re
8、garded as 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 inde-pendently of the other. Combining values from the two systemsmay result in nonconformance with the specification.1.7 This specif
9、ication and the applicable material specifica-tions are expressed in both inch-pound units and SI units.However, unless the order specifies the applicable “M” speci-fication designation (SI units), the material shall be furnishedto inch-pound units.2. Referenced Documents2.1 ASTM Standards:A 109 Spe
10、cification for Steel, Strip, Carbon, Cold-Rolled2A 109M Specification for Steel, Strip, Carbon, Cold-Rolled(Metric)2A 370 Test Methods and Definitions for Mechanical Testingof Steel Products2A 606 Specification for Steel, Sheet and Strip, High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, withImp
11、roved Atmospheric Corrosion Resistance2A 607 Specification for Steel, Sheet and Strip, High-Strength, Low-Alloy, Columbium or Vanadium, or Both,Hot-Rolled and Cold-Rolled2A 635/A635M Specification for Steel, Sheet and Strip,Heavy-Thickness Coils, Carbon, Hot-Rolled2A 682 Specification for Steel, Str
12、ip, High-Carbon, Cold-Rolled, Spring Quality, General Requirements For2A 682M Specification for Steel, Strip, High-Carbon, Cold-Rolled, Spring Quality, General Requirements For (Met-ric)2A 700 Practices for Packaging, Marking, and LoadingMethods for Steel Products for Domestic Shipment3A 751 Test Me
13、thods, Practices, and Terminology forChemical Analysis of Steel Products2E 11 Specification for Wire-Cloth Sieves for Testing Pur-poses4E 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications4E 290 Test Method for Semi-Guided Bend Test for Ductilityof Meta
14、llic Materials52.2 Military Standards:61This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys, and is the direct responsibility of SubcommitteeA01.19 on Steel Sheet and Strip.Current edition approved November 10, 2002. Published January 2003.
15、 Origi-nally approved in 1981. Last previous edition approved in 1997 as A 749 97.2Annual Book of ASTM Standards, Vol 01.03.3Annual Book of ASTM Standards, Vol 01.05.4Annual Book of ASTM Standards, Vol 14.02.5Annual Book of ASTM Standards, Vol 03.01.6Available from Standardization Documents Order De
16、sk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.MIL-STD-129 Marking for Shipment and StorageMIL-STD-163 Steel Mill Products, Preparation for Ship-ment a
17、nd Storage2.3 Federal Standards:6Fed. Std. No. 123 Marking for Shipments (Civil Agencies)Fed. Std. No. 183 Continuous Identification Marking of Ironand Steel Products3. Terminology3.1 Definitions of Terms Specific to This Standard: Descrip-tions of Terms Specific to This Standard:3.1.1 Steel Types:3
18、.1.2 carbon steelthe designation for steel when no mini-mum content is specified or required for aluminum, chromium,cobalt, columbium, molybdenum, nickel, titanium, tungsten,vanadium, zirconium, or any element added to obtain a desiredalloying effect; when the specified minimum for copper doesnot ex
19、ceed 0.40 %; or when the maximum content specified forany of the following elements does not exceed the percentagesnoted; manganese 1.65, silicon 0.60, or copper 0.60.DiscussionIn all carbon steels small quantities of certainresidual elements unavoidably retained from raw materials aresometimes foun
20、d which are not specified or required, such ascopper, nickel, molybdenum, chromium, etc. These elementsare considered as incidental and are not normally determined orreported.3.1.3 high-strength, low-alloy steela specific group ofsteels in which higher strength, and in some cases additionalresistanc
21、e to atmospheric corrosion, are obtained by moderateamounts of one or more alloying elements.3.1.4 Product Types:3.1.5 hot-rolled stripmanufactured by hot rolling billetsor slabs to the required thickness. It may be produced singlewidth or by rolling multiple width and slitting to the desiredwidth.
22、It can be supplied in coils or cut lengths as specified.Width, in. Thickness, in.Over Through Over Through. 312 0.044 0.203312 6 0.044 0.2036 12 0.044 0.230 exclWidth, mm Thickness, mmOver Through Over Through. 100 1.2 5.0100 200 1.2 5.0200 300 1.2 6.0, exclHot-rolled, high-strength, low-alloy strip
23、 is commonly avail-able by size as follows:Width, in. Thickness, in.Over Through From ThroughCoils and at any place on the strip when narrower than 1 in. The given tolerancesdo not include crown and therefore the tolerances for crown as shown in Table 5 are in addition to tolerances in Table 3.TABLE
24、 4 Thickness Tolerances of Hot-Rolled StripA(Carbon and High-Strength, Low-Alloy Steel) Ordered to Minimum Thickness(Coils and Cut Lengths, Including Pickling)NOTE 1Micrometres used for measurement of thickness shall be constructed with either flat anvils having a minimum diameter of 0.188 in. orrou
25、nded anvils having a minimum radius of curvature of 0.100 in. Micrometres with pointed anvils are not suitable for thickness measurement.Specified Width, in. Thickness Tolerance, Over Only, for Specified Minimum Thickness, in.Over Through Through 0.057Over 0.057 to0.118, inclOver 0.118 to0.187, incl
26、Over 0.187 to0.203, inclOver 0.203 to0.230, excl. 312 0.006 0.008 0.010 0.012 . . .312 6 0.006 0.010 0.010 0.012 . . .6 12 0.008 0.010 0.010 0.012 0.012AMeasurements for the above table are taken“in. from the edge of a strip on 1 in. or wider; and at any place on the strip when narrower than 1 in. T
27、he given tolerancesdo not include crown and therefore the tolerances for crown as shown in Table 5 are in addition to tolerances in Table 4Table 4.TABLE 5 Crown Tolerances of Hot-Rolled Strip (Carbon andHigh-Strength, Low-Alloy Steel)(Coils and Cut Lengths, Including Pickled)Strip may be thicker at
28、the center than at a point38 in. from theedge by the following amounts:Specified Width, in. Crown Tolerance, Over Only, for SpecifiedMinimum Thickness, in.Over ThroughThrough0.118Over 0.118to 0.187,inclOver 0.187to 0.230,excl. 312 0.002 0.002 0.001312 6 0.003 0.002 0.0026 12 0.004 0.003 0.003TABLE 6
29、 Width Tolerances of Hot-Rolled Strip (Carbon andHigh-Strength, Low-Alloy Steel)(Coils and Cut Lengths, Including Pickled)Specified Width,in.Width Tolerance, Over andUnder, in.Over ThroughMill Edgeand SquareEdge StripCut EdgeThrough0.109 in.Over0.109 in.Through0.230 excl. 2132 0.008 0.01625364 0.008
30、 0.016510116 0.010 0.01610 12332 0.016 0.016A 749/A749M 97 (2002)4satisfy him that the steel is being produced and furnished inaccordance with the specification. Mill inspection by thepurchaser shall not interfere unnecessarily with the manufac-turers operation.13. Rejection and Rehearing13.1 Unless
31、 otherwise specified, any rejection shall bereported to the manufacturer within a reasonable time afterreceipt of material by the purchaser.13.2 Material that is reported to be defective subsequent tothe acceptance at the purchasers works shall be set aside,adequately protected, and correctly identi
32、fied. The manufac-turer shall be notified as soon as possible so that an investiga-tion may be initiated.13.3 Samples that are representative of the rejected materialshall be made available to the manufacturer. In the event thatthe manufacturer is dissatisfied with the rejection, he mayrequest a reh
33、earing.14. Test Reports and Certification14.1 When test reports are required by the purchase order orthe material specification, the supplier shall report the results ofall tests required by the material specification and the order.14.2 When certification is required by the purchase order,the suppli
34、er shall furnish a certification that the material hasbeen manufactured and tested in accordance with the require-ments of the material specification.14.3 A signature is not required on test reports or certifica-tions. However, the document shall clearly identify the orga-nization submitting the doc
35、ument. Notwithstanding the ab-sence of a signature, the organization submitting the documentis responsible for the content of the document.14.4 When test reports are required, copies of the originalmaterial manufacturers test report shall be included with anysubsequent test report.14.5 A material te
36、st report, certificate of inspection, orsimilar document printed from or used in electronic form froman electronic data interchange (EDI) transmission shall beregarded as having the same validity as a counterpart printed inthe certifiers facility. The content of the EDI transmitteddocument must meet
37、 the requirements of the invoked ASTMstandard(s) and conform to any existing EDI agreement be-tween the purchaser and the supplier. Notwithstanding theabsence of a signature, the organization submitting the EDItransmission is responsible for the content of the report.NOTE 2The industry definition as
38、 invoked here is: EDI is thecomputer to computer exchange of business information in an agreed uponstandard format such as ANSI ASC X12.15. Marking15.1 As a minimum requirement, the material shall beidentified by having the manufacturers name, ASTM designa-tion, weight, purchasers order number, and
39、material identifi-cation legibly stenciled on top of each lift or shown on a tagattached to each coil or shipping unit.15.2 When specified in the contract or order, and for directprocurement by or direct shipment to the government, markingfor shipment, in addition to requirements specified in thecon
40、tract or order, shall be in accordance with MIL-STD-129for military agencies and in accordance with Fed. Std. No. 123for civil agencies.15.3 For Government procurement by the Defense SupplyAgency, strip material shall be continuously marked for iden-tification in accordance with Fed. Std. No. 183.15
41、.4 Bar coding is acceptable as a supplementary identifi-cation method. Bar coding should be consistent with theAutomotive Industry Action Group (AIAG) standard preparedby the primary metals subcommittee of the AIAG bar codeproject team.TABLE 7 Length Tolerances of Hot-Rolled Strip (Carbon and High-S
42、trength Alloy)(Cut Lengths, Including Pickled)Specified Widths, in.Length Tolerances over Specified Length, ft for Widths Given, in. No Tolerance UnderTo 5 ft, inclOver5to10ft,inclOver 10 to 20 ft,inclOver 20 to 30 ft,inclOver 30 to 40 ft,inclOver 40 ft,inclTo 3, incl14 “1234 1112Over 3 to 6, incl38
43、12583412Over 6 to 12, incl1234 1114 112 134TABLE 8 Camber TolerancesAof Hot-Rolled Strip(Carbon and High-Strength Low-Alloy)(Coils and Cut Lengths, Including Pickled, Applicable to MillEdge, Square Edge, and Slit or Cut Edge)NOTE 1 Camber is the deviation of a side edge from a straight line.The stan
44、dard for measuring this deviation is based on any 8-ft length.BItis obtained by placing an 8-ft straightedge on the concave side andmeasuring the maximum distance between the strip edge and the straight-edge.For strip wider than 112in.14 in. in any 8 ft.For strip 112 in. and narrower12 in. in any 8
45、ft.AWhen the camber tolerances shown in the above table are not suitable for aparticular purpose, hot-rolled strip is sometimes machine straightened.BFor strip less than 8 ft tolerances are to be established in each instance.A formula for calculating camber is as follows:L23 C1645 C2in Lwhere:C1= Ca
46、mber in 8 ft andC2= Camber in any given length L.TABLE 9 Flatness Tolerances of Hot-Rolled Strip(Carbon and High-Strength Low-Alloy)It has not been practicable to formulate flatness tolerances for hot-rolled carbonstrip steel because of the wide range of widths and thicknesses, and variety ofchemica
47、l compositions, mechanical properties and types, produced in coils andcut lengths.A 749/A749M 97 (2002)516. Packaging16.1 Unless otherwise specified, the strip shall be packagedand loaded in accordance with Practices A 700.16.2 When specified in the contract or order, and for directprocurement by or
48、 direct shipment to the government, whenLevel A is specified, preservation, packaging, and packing shallbe in accordance with the Level A requirements of MIL-STD-163.16.3 When coils are ordered it is customary to specify aminimum or range of inside diameter, maximum outsidediameter, and a maximum co
49、il weight, if required. The abilityof manufacturers to meet the maximum coil weights dependsupon individual mill equipment. When required, minimum coilweights are subject to negotiation.17. Keywords17.1 carbon; steel; stripANNEX(Mandatory Information)A1. PERMISSIBLE VARIATIONS IN DIMENSIONS AND MASS IN SI UNITSA1.1 Listed in Tables A1.1-A1.7 are permissible varia-tions in dimensions and mass expressed in the InternationalSystem of Units (SI) terminology.TABLE A1.1 Thickness Tolerances of Hot-Rolled StripA(Carbon and High-Strength, Low-Al
