1、Designation: A512 17Standard Specification forCold-Drawn Buttweld Carbon Steel Mechanical Tubing1This standard is issued under the fixed designation A512; 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 U.S. Department of Defense.1. Scope*1.1 This specification covers cold-drawn buttweld c
3、arbonsteel tubes for use as mechanical tubing.1.2 This specification covers round, square, rectangular, andspecial shape mechanical tubing.1.3 Round tube size ranges covered are outside diameters upto 312 in. (88.9 mm) and wall thickness from 0.035 to 0.500 in.(0.89 to 12.70 mm).1.4 Optional supplem
4、entary requirements are provided and,when desired, shall be so stated in the order.1.5 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.
5、6 This product is available in various grades (Section 6Tables 1 and 2 and conditions (Section 5).1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International
6、Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA751 Test Methods, Practices, and Terminology for Chemi-cal Ana
7、lysis of Steel ProductsA1040 Guide for Specifying Harmonized Standard GradeCompositions for Wrought Carbon, Low-Alloy, and AlloySteels2.2 Military Standards:3MIL-STD-129 Marking for Shipment and Storage2.3 Federal Standard:Fed. Std. No. 123 Marking for Shipments (Civil Agencies)33. Ordering Informat
8、ion3.1 Orders for material under this specification shouldinclude the following, as required, to describe the requiredmaterial adequately:3.1.1 Quantity (feet, weight (Note 1), or number of lengths),NOTE 1The term “weight” is temporarily used in this specificationbecause of established trade usage.
9、The word is used to mean both “force”and “mass,” and care must be taken to determine which is meant in eachcase (SI unit for force = newton and for mass = kilogram).3.1.2 Name of material (buttweld carbon steel mechanicaltubing),3.1.3 Form (round, square, rectangular, special shape),3.1.4 Condition,
10、 description and code letters (Section 5),3.1.5 Grade, if required (Section 6),3.1.6 Dimensions (round, Section 9 or square andrectangular, Section 10),3.1.7 Length (round length, 9.2; square and rectangularlength, 10.5),3.1.8 Burr removal (Section 11),3.1.9 Report of chemical analysis and products
11、analysis, ifrequired,3.1.10 Individual supplementary requirements if required(S1 through S5),3.1.11 Special requirements,3.1.12 End use,3.1.13 Specification designation,3.1.14 Special marking (Section 15), and3.1.15 Special packaging (Section 16).4. Materials and Manufacture4.1 The steel shall be ma
12、de by any process.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved Nov. 1, 2017. Published November 2017. Originallyapproved
13、 in 1964. Last previous edition approved in 2012 as A512 06 (2012).DOI: 10.1520/A0512-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summ
14、ary page onthe ASTM website.3Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh
15、ohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Org
16、anization Technical Barriers to Trade (TBT) Committee.14.2 If a specific type of melting is required by the purchaser,it shall be as stated on the purchase order.4.3 The primary melting may incorporate separate degas-sing or refining, and may be followed by secondary melting,such as electroslag or v
17、acuum-arc remelting. If secondarymelting is employed, the heat shall be defined as all of theingots remelted from a single primary heat.4.4 Steel may be cast in ingots or may be strand cast. Whensteel of different grades is sequentially strand cast, identifica-tion of the resultant transition materi
18、al is required. Theproducer shall remove the transition material by an establishedprocedure that positively separates the grades.4.5 Tubes shall be made by the furnace buttweld process.4.6 Tubes shall be cold finished, either externally only(sunk) or externally and internally (mandrel drawn).5. Cond
19、ition5.1 The purchaser shall specify in the order one of thefollowing conditions:MD (Mandrel Drawn)No final thermal treatmentSD (Sink Drawn)No final thermal treatmentMDSRMandrel Drawn and Stress RelievedSDSRSink Drawn and Stress RelievedMDSAMandrel Drawn and SoftAnnealed or normalizedSDSASink Drawn
20、and Soft Annealed or normalizedNORM-MD-SRNormalized, Mandrel Drawn, and StressRelievedNORM-SD-SRNormalized, Sink Drawn, and Stress Re-lieved6. Chemical Composition6.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 1 or Table 2 (seeSpecification A1040) and T
21、able 3.6.2 When a grade is ordered under this specification, sup-plying an alloy grade that specifically requires the addition ofany element other than those listed for the ordered grade inTable 1 or Table 2 is not permitted.7. Heat Analysis7.1 An analysis of each heat of steel shall be made by thes
22、teel manufacturer to determine the percentages of the ele-ments specified; if secondary melting processes are used, theheat analysis shall be obtained from one remelted ingot or theproduct of one remelted ingot of each primary melt. The heatanalysis shall conform to the requirements specified, excep
23、tthat where the heat identity has not been maintained or wherethe analysis is not sufficiently complete to permit conformanceto be determined, the chemical composition determined from aproduct analysis made by the tubular manufacturer shallconform to the requirements specified for heat analysis. Whe
24、nrequested in the order or contract, a report of such analysesshall be furnished to the purchaser.7.2 A report of this analysis shall be furnished only whenrequested on the order.8. Product Analysis8.1 When requested on the purchase order, a product analy-sis shall be made by the manufacturer. The c
25、hemical compo-sition thus determined shall conform to the requirementsprescribed in Table 1 or Table 2 as modified by Table 3.8.2 The product analysis limits shown for carbon are notnormally applicable to the MT grades.8.3 The number and source of samples for such productanalysis shall be based on t
26、he individual heat or lot identity ofone of the following forms of material.8.3.1 Heat Identity MaintainedOne product analysis perheat on either a billet, a length of flat rolled stock, or a tube.TABLE 1 Chemical RequirementsAGradeDesignationChemical Composition Limits, %Carbon ManganesePhospho-rus,
27、 maxSulfur, maxMT 1010 0.050.15 0.300.60 0.04 0.045MT 1015 0.100.20 0.300.60 0.04 0.045MT X 1015 0.100.20 0.600.90 0.04 0.045MT 1020 0.150.25 0.300.60 0.04 0.045MT X 1020 0.150.25 0.701.00 0.04 0.045ARimmed or capped steels which may be used for the above grades arecharacterized by a lack of uniform
28、ity in their chemical composition, and for thisreason product analysis is not technologically appropriate unless misapplication isclearly indicated.TABLE 2 Chemical Requirements for Other Carbon GradesAGradeDesig-nationBChemical Composition Limits, %Carbon ManganesePhospho-rus, maxSulfur, max1008 0.
29、10 max 0.300.50 0.040 0.0451010 0.080.13 0.300.60 0.040 0.0451012 0.100.15 0.300.60 0.040 0.0451015 0.130.18 0.300.60 0.040 0.0451016 0.130.18 0.600.90 0.040 0.0451018 0.150.20 0.600.90 0.040 0.0451019 0.150.20 0.701.00 0.040 0.0451020 0.180.23 0.300.60 0.040 0.0451021 0.180.23 0.600.90 0.040 0.0451
30、025 0.220.28 0.300.60 0.040 0.0451026 0.220.28 0.600.90 0.040 0.0451030 0.280.34 0.600.90 0.040 0.0451035 0.320.38 0.600.90 0.040 0.0451110 0.080.13 0.300.60 0.040 0.130C1115 0.130.20 0.600.90 0.040 0.130C1117 0.140.20 1.001.30 0.040 0.130CARimmed or capped steels which may be used for the above gra
31、des arecharacterized by a lack of uniformity in their chemical composition, and for thisreason product analysis is not technologically appropriate unless misapplication isclearly indicated.BOther analyses are available.CGrades 1110, 1115, and 1117 shall contain 0.08 min % sulfur.TABLE 3 Tolerances f
32、or Product Analysis for Steels Shown inTable 1ElementLimit, or Maximumof SpecifiedRange, %Variation, Over Maximum Limit orUnder Minimum LimitUnder min, % Over max, %Carbon To 0.15, inclOver 01.50.020.030.030.04Manganese To 0.60, inclOver 0.600.030.040.030.04PhosphorusSulfur.0.010.01A512 1728.3.2 Hea
33、t Identity Not MaintainedOne product analysisfrom one tube per 2000 ft (610 m) or less for sizes over 3 in.(76.2 mm), or one product analysis from one tube per 5000 ft(1524 m) or less for sizes under 3 in. (76.2 mm).8.4 If the original test for product analysis fails, retests of 2additional billets,
34、 2 lengths of flat rolled stock, or 2 tubes shallbe made. Both retests for the elements in question shall meetthe requirements of this specification; otherwise all remainingmaterial in the heat or lot shall be rejected, or at the option ofthe producer, each billet, length, flat rolled stock, or tube
35、 maybe individually tested for acceptance.8.5 Samples for product analysis, except for spectrochemi-cal analysis, shall be taken in accordance with Practice A751,and the composition thus determined shall correspond to therequirements in applicable section or table.9. Permissible Variations in Dimens
36、ions of Round Tubing9.1 Diameter and Wall Thickness:9.1.1 Variations in outside diameter, inside diameter, andwall thickness shall not exceed the amounts prescribed in Table4.9.1.2 These variations apply to round, unannealed, andstress-relieved tubing.9.1.3 Diameter tolerance includes ovality.9.1.4
37、Sink tubing is normally ordered by outside diameterand nominal wall. Mandrel-drawn tubing is normally orderedby outside diameter and inside diameter and may be ordered byoutside diameter or inside diameter and wall thickness but notby all three dimensions.9.2 LengthRandom lengths between acceptable
38、limits willbe furnished, utilizing the full mill length. Tubing will be cut inhalf if specified. Full length random tubing will have a spreadnot exceeding 7 ft (2.1 m). Half-length random tubing willhave a spread not exceeding 4 ft (1.2 m). Not more than 10 %of the total footage of a shipment may be
39、 furnished in lengthsshorter than the minimum specified but not less than 6 ft (1.8m).9.2.1 When specified, multiple lengths will be furnished andshould include allowances made for the customers cutting toolwidth and grippage. Maximum and minimum lengths may bespecified with the understanding that n
40、ot more than 10 % of thetotal footage in a shipment may be furnished in individualmultiples cut to the customers specifications.9.2.2 Variations from the specified length shall not exceedthe amounts prescribed in Table 5.9.3 Straightness:9.3.1 Around tube shall be considered straight provided thatno
41、 3-ft (0.9-m) section departs from a straight line by morethan 0.030 in. (0.76 mm).9.3.2 The straightness of round tubes shorter than 3 ft (0.9m) shall be proportionate to 0.010 in./ft (0.8 mm/m).9.3.3 These straightness tolerances do not apply to soft-annealed tubing nor to long lengths of small di
42、ameter tubing.10. Permissible Variations in Dimensions of Square andRectangular Tubing10.1 Outside Dimensions and Wall ThicknessVariations inlargest outside dimensions across flats and wall thickness shallnot exceed the amounts prescribed in Table 6.10.2 Corner RadiiThe corners of square and rectang
43、ulartubes shall be slightly rounded inside and slightly roundedoutside consistent with wall thickness. The outside cornersmay be slightly flattened. The radii of corners for square andrectangular cold-finished buttweld tubes shall be in accordancewith Table 7. Special radii may be obtained.10.3 Squa
44、reness TolerancePermissible variations for theside of square and rectangular tube shall be determined by thefollowing equation:6b 5 c 30.006, in. mm!where:b = tolerance for out-of-square, andc = largest external dimensions across flats, in. (mm).The squareness of sides is commonly determined by one
45、ofthe following methods:10.3.1 A square, with two adjustable contact points on eacharm, is placed on two sides. A fixed feeler gage is then used tomeasure the maximum distance between the free contact pointand the surface of the tubing.TABLE 4 Diameter and Wall Thickness Tolerances for Round TubingO
46、utside Diameter Range, in. (mm)Outside Diameter, in. (mm) Inside Diameter, in. (mm) Wall Thickness, %Over Under Over Under Over UnderSunkUp to12 (12.7), excl 0.004 (0.10) 0 . . . . . . 15A1512 to 112 (12.7 to 38.1), excl 0.005 (0.13) 0 . . . . . . 10A10112 to 3 (38.1 to 76.2), incl 0.010 (0.25) 0 .
47、. . . . . 10A10Mandrel DrawnLess than 0.156 (3.96) wall:Up to12 (12.7), excl12 to 112 (12.7 to 38.1), excl0.004 (0.10)0.005 (0.13)00000.010 (0.25)0.005 (0.13)B1212101212100.156 (3.96) wall and over:12 to 112 (12.7 to 38.1), excl 0.005 (0.13) 0 0 0.005 (0.13)B77Under 0.156 (3.96) wall:112 (38.1) and
48、over 0.010 (0.25) 0 . . . 0.010 (0.25) 10 100.156 (3.96) wall and over:112 (38.1) and over 0.010 (0.25) 0 0 0.010 (0.25) 7 7AExcept at the weld line, where the weld pad may exceed this figure.BTubes with an inside diameter under12 in. (12.7 mm) may require more than 0.005 in. (0.13 mm) inside diamet
49、er tolerance and the producer should be consulted.A512 17310.3.2 A square, equipped with direct-reading vernier, maybe used to determine the angular deviation which, in turn, maybe related to distance to inches.10.4 Twist ToleranceVariation in twist for square andrectangular tubing shall not exceed the amounts prescribed inTable 8. The twist in square and rectangular tubing may bemeasured by holding one end of the tubing on a surface plateand noting the height of either corner of the opposite end ofsame
