1、Designation: B491/B491M 15Standard Specification forAluminum and Aluminum-Alloy Extruded Round Tubes forGeneral-Purpose Applications1This standard is issued under the fixed designation B491/B491M; the number immediately following the designation indicates the yearof original adoption or, in the case
2、 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.1. Scope*1.1 This specification covers aluminum and aluminum-alloyextruded round tubes either in coils o
3、r straight lengths, forgeneral purpose applications such as refrigeration service, gaslines, oil lines, and instrument lines, in the alloys (Note 2) andtempers shown in Table 2 Table 3, in outside diameters of0.250 through 0.750 in. 6.00 through 20.00 mm. For diam-eters over 0.500 through 0.750 in.
4、over 12.50 through20.00 mm, the diameter and wall-thickness tolerances andeddy-current test parameters, if required, shall be agreed uponby the producer and the purchaser. Only tubes in aluminum1200-H111 and 1235-H111 are sized after extrusion to mini-mize ovalness.1.2 Alloy and temper designations
5、are in accordance withANSI H35.1/H35.1(M). The equivalent Unified NumberingSystem alloy designations are those of Table 1 preceded by A9(for example, A91050 for aluminum 1050), in accordance withPractice E527.NOTE 1For extruded tubes see Specification B221, and for drawntubes for general-purpose app
6、lications see Specification B483.NOTE 2Throughout this specification the term alloy in the generalsense includes aluminum as well as aluminum alloy.NOTE 3For inch-pound orders specify B491; for metric orders specifyB491M. Do not mix units.1.3 For acceptance criteria for inclusion of new aluminumand
7、aluminum alloys in this specification, see Annex A2.1.4 The values stated in either inch-pound or SI units are tobe regarded separately as standards. The SI units are showneither in brackets or in separate tables. The values stated ineach system are not exact equivalents; therefore, each systemmust
8、be used independently of the other. Combining valuesfrom two systems will result in nonconformance with thespecification.2. Referenced Documents2.1 The following documents of the issue in effect on thedate of material purchase form a part of this specification to theextent referenced herein:2.2 ASTM
9、 Standards:2B557 Test Methods for Tension Testing Wrought and CastAluminum- and Magnesium-Alloy ProductsB557M Test Methods for Tension Testing Wrought and CastAluminum- and Magnesium-Alloy Products (Metric)B660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB666/B666M Practice for
10、Identification Marking of Alumi-num and Magnesium ProductsB881 Terminology Relating to Aluminum- and Magnesium-Alloy ProductsB945 Practice for Aluminum Alloy Extrusions Press Cooledfrom an Elevated Temperature Shaping Process for Pro-duction of T1, T2, T5 and T10Type TempersB985 Practice for Samplin
11、g Aluminum Ingots, Billets, Cast-ings and Finished or Semi-Finished Wrought AluminumProducts for Compositional AnalysisE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE34 Test Methods for Chemical Analysis of Aluminum andAluminum-Base AlloysE215 Prac
12、tice for Standardizing Equipment for Electromag-netic Testing of Seamless Aluminum-Alloy TubeE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)E607 Test Method for Atomic Emission SpectrometricAnalysis Aluminum Alloys by the Point to Plane Tech-nique Nitrogen Atmosphe
13、re (Withdrawn 2011)3E716 Practices for Sampling and Sample Preparation ofAluminum and Aluminum Alloys for Determination ofChemical Composition by Spectrochemical Analysis1This specification is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of
14、Subcommittee B07.03 onAluminum Alloy Wrought Products.Current edition approved Jan. 1, 2015. Published January 2015. Originallyapproved in 1969. Last previous edition approved in 2006 as B491/B491M 06.DOI: 10.1520/B0491_B0491M-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org,
15、orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the en
16、d of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1E1251 Test Method for Analysis of Aluminum and Alumi-num Alloys by Spark Atomic Emission Spectrometry2.3 ANSI Standards:4H35.1/H35.1(M) Alloy and Temper Designation Sys
17、tems forAluminum4Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600,Arlington, VA 22209, http:/www.aluminum.org.TABLE 1 Chemical Composition LimitsA,B,C,HAlloy Silicon Iron Copper ManganeseMagne-siumChro-miumZincVana-diumTita-niumOtherElementsDAluminumEach TotalE1050 0.25 0.40 0
18、.05 0.05 0.05 . 0.05 0.05 0.03 0.03G. 99.50F1100 0.95 Si + Fe 0.050.20 0.05 . . 0.10 . . 0.05 0.15 99.00F1200 1.00 Si + Fe 0.05 0.05 . . 0.10 . 0.05 0.05 0.15 99.00F1235 0.65 Si + Fe 0.05 0.05 0.05 . 0.10 0.05 0.06 0.03G. 99.35F3003 0.6 0.7 0.050.20 1.01.5 . . 0.10 . . 0.05 0.15 remainder3102 0.40 0
19、.7 0.10 0.050.40 . . 0.30 . 0.10 0.05 0.15 remainder6063 0.200.6 0.35 0.10 0.10 0.450.9 0.10 0.10 . 0.10 0.05 0.15 remainderALimits are in percent maximum unless shown as a range or otherwise stated.BAnalysis shall be made for the elements for which limits are shown in this table.CFor purposes of de
20、termining conformance to these limits, an observed value or a calculated value attained from analysis shall be rounded off to the nearest unit in thelast right-hand place of figures used in expressing the specified limit, in accordance with the rounding method of Practice E29.DOthers includes listed
21、 elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements notspecified in the specification. However, such analysis is not required and may not cover all metallic Others elements. Should any analysis by the producer or t
22、he purchaserestablish that an Others element exceeds the limit of Each or that the aggregate of several Others elements exceeds the limit of Total, the material shall be considerednonconforming.EOther ElementsTotal shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the sec
23、ond decimal before determining the sum.FThe aluminum content shall be calculated by subtracting from 100.00 % the sum of all metallic elements present in amounts of 0.010 % or more each, roundedtothesecond decimal before determining the sum.GVanadium 0.05%, maximum.HIn case there of a discrepancy in
24、 the values listed in Table 1 with those listed in the “International Alloy Designations and Chemical Composition Limits for WroughtAluminum and Wrought Aluminum Alloys” (known as the “Teal Sheets”), the composition limits registered with the Aluminum Association and published in the “Teal Sheets”sh
25、ould be considered the controlling composition. The “Teal Sheets” are available at http:/www.aluminum.org/tealsheets.TABLE 2 Tensile Property LimitsA,BAlloy TemperSpecified WallThickness, in.Tensile Strength, ksiYield Strength(0.2 % Offset)min, ksiElongation in2 in. min, %min max1050C1100CH112H1120.
26、0320.0500.0320.0508.511.014.517.0D2.53.025251200CH111H1120.0320.0500.0320.05011.010.017.016.09.53.025251235CH111H1120.0320.0500.0320.05011.09.0.15.07.53.030253003CH112 0.0320.050 14.0 20.0D5.0 253102 H112 0.0320.050 11.0 18.0 4.0 256063 T1 0.0320.050 17.0 . 9.0 12AThe basis for establishment of mech
27、anical property limits is shown in Annex A1.BTo determine conformance to this specification, each value for tensile strength and for yield strength shall be rounded to the nearest 0.1 ksi and each value for elongationto the nearest 0.5 %, both in accordance with the rounding method of Practice E29.C
28、Tubes in this alloy are also available in the F (as extruded) temper. Tensile properties for F temper are not specified or guaranteed.DMaximum tensile strength for coils. No maximum limit for extruded lengths.TABLE 3 Tensile Property Limits SI UnitsAlloy TemperSpecified WallThickness, mmTensile Stre
29、ngth, MPaYield Strength(0.2 % Offset)min, MPaElongationin 50 mmmin, %min max1050AH112 0.801.30 60 100 15 251100AH112 0.801.30 75 115B20 251200AH111 0.801.30 75 115 65 25H112 0.801.30 70 110 20 251235AH111 0.801.30 75 . 50 30H112 0.801.30 60 105 20 253003AH112 0.801.30 95 140B35 253102 H112 0.801.30
30、95 125 30 256063 T1 0.801.30 115 . 60 12ATubes in this alloy are also available in the F (as extruded) temper. Tensile properties for F temper are not specified or guaranteed.BMaximum tensile strength for coils. No maximum limit for extruded lengths.B491/B491M 152H35.2 Dimensional Tolerances for Alu
31、minum Mill ProductsH35.2M Dimensional Tolerances for Aluminum Mill Prod-ucts (Metric)2.4 Federal Standard:5Fed. Std. No. 123 Marking for Shipment (Civil Agencies)2.5 Military Standard:5MIL-STD-129 Marking for Shipment and Storage2.6 CEN Standard:6EN 14242 Aluminium and Aluminium AlloysChemicalAnalys
32、isInductively Coupled Plasma Optical EmissionSpectral Analysis3. Terminology3.1 DefinitionsRefer to Terminology B8813.2 Definitions of Terms Specific to This Standard:3.2.1 capable ofThe term capable of as used in thisspecification means that the test need not be performed by theproducer of the mate
33、rial. However, should testing by thepurchaser establish that the material does not meet theserequirements, the material shall be subject to rejection.4. Ordering Information4.1 Orders for material to this specification shall include thefollowing information:4.1.1 This specification designation (whic
34、h includes thenumber, the year, and the revision letter, if applicable),NOTE 4For inch-pound orders specify B491, for metric orders specifyB491M. Do not mix units.4.1.2 Quantity in pieces or pounds kilograms,4.1.3 Alloy (Section 7),4.1.4 Temper (Section 8),4.1.5 Cross-sectional dimensions (outside d
35、iameter and wallthickness, or inside diameter and wall thickness),4.1.6 Length, random or specific,4.1.7 Nominal inside diameter of coils, and weight ormaximum outside diameter, if applicable (18.3),4.2 Additionally, orders for material to this specificationshall include the following information wh
36、en required by thepurchaser:4.2.1 Whether testing for leaks is required (Section 10), andfrequency of testing required,4.2.2 For aluminum 1200-H111 and 1235-H111, whetherinside cleanliness test is required (11.2), and frequency oftesting required,4.2.3 Whether inspection or witness of inspection and
37、 testsby the purchasers representative is required prior to materialshipment (Section 14),4.2.4 Whether certification is required (Section 16),4.2.5 Whether marking for identification is required (Sec-tion 17), and4.2.6 Whether Practices B660 applies and, if so, the levelsof preservation packaging,
38、and packing required (18.4).5. Manufacture5.1 The tubes covered by this specification shall be pro-duced by the hot-extrusion method. The tube ends shall becrimped or otherwise sealed to avoid contamination duringshipping. When sized tube in aluminum 1200-H111 or 1235-H111 is required the extruded t
39、ube may be lightly cold drawn.6. Responsibility for Quality Assurance6.1 Responsibility for Inspection Unless otherwise speci-fied in the contract or purchase order, the producer is respon-sible for the performance of all inspection and test require-ments specified herein. Except as otherwise specif
40、ied in thecontract or order, the producer may use his own or any othersuitable facilities for the performance of the inspection and testrequirements specified herein, unless disapproved by the pur-chaser. The purchaser shall have the right to perform any of theinspections and tests set forth in this
41、 specification where suchinspections are deemed necessary to assure that materialconforms to prescribed requirements.6.2 Lot DefinitionAn inspection lot shall be defined asfollows:6.2.1 For heat-treated tempers, an inspection lot shall con-sist of an identifiable quantity of material of the same mil
42、lform, alloy, temper, and nominal dimensions traceable to aheat-treated lot or lots, and subjected to inspection at one time.6.2.2 For nonheat-treated tempers, an inspection lot shallconsist of an identifiable quantity of material of the same millform, alloy, temper, and nominal dimensions subjected
43、 toinspection at one time.7. Chemical Composition7.1 LimitsThe extrusions shall conform to the chemicalcomposition limits in Table 1. Conformance shall be deter-mined by the producer, by taking samples in accordance withPractices E716 when the ingots are poured and analyzing thosesamples in accordan
44、ce with Test Methods E34, E607, E1251,or EN 14242.At least one sample shall be taken for each groupof ingots poured simultaneously from the same source ofmolten metal. If the producer has determined the chemicalcomposition during pouring of the ingots, they shall not berequired to sample and analyze
45、 the finished product.NOTE 5It is standard practice in the United States aluminum industryto determine conformance to the chemical composition limits prior tofurther processing of ingots into wrought products. Due to the continuousnature of the process, it is not practical to keep a specific ingot a
46、nalysisidentified with a specific quantity of finished material.7.2 If it becomes necessary to analyze the finished orsemi-finished product for conformance to chemical composi-tion limits, the methods of sampling and methods of analysisshall be as provided in the following:7.2.1 Methods of SamplingS
47、amples for chemical analysisshall be taken in accordance with Practice B985.7.2.2 Methods of AnalysisAnalysis shall be performed inaccordance with Test Methods E34, E607,orE1251, or CENEN 14242 (ICP Method).8. Tensile Properties8.1 LimitsTubes shall conform to the tensile propertyrequirements specif
48、ied in Table 2 Table 3.5Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.6Available from European Committee for Standardization (CEN), AvenueMarnix 17, B-1000, Brussels, Belgium, http:/www.cen.eu.B491/B491M 1538.2 Number of
49、 Specimens:8.2.1 One tension test specimen shall be taken for each1000 lb 500 kg or fraction thereof in a lot.8.2.2 Other procedures for selecting samples may be em-ployed if agreed upon by the producer and the purchaser.8.3 Test SpecimensThe tension test specimens shall be asspecified in Test Methods B557 B557M.8.4 Test MethodsThe tension tests shall be made inaccordance with Test Methods B557 B557M.9. Heat Treatment9.1 Tubes produced in alloy 6063T1 shall be cooled froman elevated temperature shaping process and n
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