1、Designation: A512 17A512 18Standard 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 revi
2、sion. A 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 but
3、tweld carbon steel tubes for use as mechanical tubing.1.2 This specification covers round, square, rectangular, and special shape mechanical tubing.1.3 Round tube size ranges covered are outside diameters up to 3 12 in. (88.9 mm) and wall thickness from 0.035 to 0.500 in.(0.89 to 12.70 mm).1.4 Optio
4、nal supplementary 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 regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not consider
5、ed standard.1.6 This product is available in various grades (Section 6 Tables 1 and 2 and conditions (Section 5).1.7 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of I
6、nternational Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA751 Test Methods, Practices, and Terminology for
7、Chemical Analysis of Steel ProductsA1040 Guide for Specifying Harmonized Standard Grade Compositions for Wrought Carbon, Low-Alloy, and Alloy Steels2.2 Military Standards:3MIL-STD-129 Marking for Shipment and Storage2.3 Federal Standard:Fed. Std. No. 123 Marking for Shipments (Civil Agencies)33. Ord
8、ering Information3.1 Orders for material under this specification should include the following, as required, to describe the required materialadequately:3.1.1 Quantity (feet, weight (Note 1), or number of lengths),NOTE 1The term “weight” is temporarily used in this specification because of establish
9、ed trade usage. The word is used to mean both “force” and“mass,” and care must be taken to determine which is meant in each case (SI unit for force = newton and for mass = kilogram).3.1.2 Name of material (buttweld carbon steel mechanical tubing),3.1.3 Form (round, square, rectangular, special shape
10、),3.1.4 Condition, description and code letters (Section 5),3.1.5 Grade, if required (Section 6),3.1.6 Dimensions (round, Section 9 or square and rectangular, Section 10),1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct
11、 responsibility of Subcommittee A01.09on Carbon Steel Tubular Products.Current edition approved Nov. 1, 2017Sept. 1, 2018. Published November 2017September 2018. Originally approved in 1964. Last previous edition approved in 20122017as A512 06 (2012).A512 17. DOI: 10.1520/A0512-17.10.1520/A0512-18.2
12、 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from Standardization Documents Order Desk, Bldg. 4
13、 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.This 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 the previous version. Becauseit may not be technically possible to adequately depi
14、ct 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 Summary of Changes section appears at the end of this standardCopyright ASTM Internation
15、al, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.7 Length (round length, 9.2; square and rectangular length, 10.5),3.1.8 Burr removal (Section 11),3.1.9 Report of chemical analysis and products analysis, if required,3.1.10 Individual supplementary requireme
16、nts 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 made by any process.4.2 If a specific type of melting is requir
17、ed by the purchaser, it shall be as stated on the purchase order.4.3 The primary melting may incorporate separate degassing or refining, and may be followed by secondary melting, such aselectroslag or vacuum-arc remelting. If secondary melting is employed, the heat shall be defined as all of the ing
18、ots remelted froma single primary heat.4.4 Steel may be cast in ingots or may be strand cast. When steel of different grades is sequentially strand cast, identificationof the resultant transition material is required. The producer shall remove the transition material by an established procedure that
19、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).TABLE 1 Chemical RequirementsAGradeDesignationChemical Composition Limits, %Carbon Manganese Phospho-ru
20、s, max Sulfur, 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 0.045A Rimmed or capped steels which may be used for the above grades arecharacterized by a lack of uni
21、formity 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 Manganese Phospho-rus, max Sulfur, max1
22、008 0.10 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
23、0.0451025 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 0.130CA Rimmed or capped steels which may be used for the ab
24、ove grades arecharacterized by a lack of uniformity in their chemical composition, and for thisreason product analysis is not technologically appropriate unless misapplication isclearly indicated.B Other analyses are available.C Grades 1110, 1115, and 1117 shall contain 0.08 min % sulfur.A512 1825.
25、Condition5.1 The purchaser shall specify in the order one of the following conditions:MD (Mandrel Drawn)No final thermal treatmentSD (Sink Drawn)No final thermal treatmentMDSRMandrel Drawn and Stress RelievedSDSRSink Drawn and Stress RelievedMDSAMandrel Drawn and Soft Annealed or normalizedSDSASink
26、Drawn and Soft Annealed or normalizedNORM-MD-SRNormalized, Mandrel Drawn, and Stress RelievedNORM-SD-SRNormalized, Sink Drawn, and Stress Relieved6. Chemical Composition6.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 1 or Table 2 (see SpecificationA1040
27、) and Table 3.6.2 When a grade is ordered under this specification, supplying an alloy grade that specifically requires the addition of anyelement other than those listed for the ordered grade in Table 1 or Table 2 is not permitted.7. Heat Analysis7.1 An analysis of each heat of steel shall be made
28、by the steel manufacturer to determine the percentages of the elementsspecified; if secondary melting processes are used, the heat analysis shall be obtained from one remelted ingot or the product ofone remelted ingot of each primary melt. The heat analysis shall conform to the requirements specifie
29、d, except that where the heatidentity has not been maintained or where the analysis is not sufficiently complete to permit conformance to be determined, thechemical composition determined from a product analysis made by the tubular manufacturer shall conform to the requirementsspecified for heat ana
30、lysis. When requested in the order or contract, a report of such analyses shall be furnished to the purchaser.7.2 A report of this analysis shall be furnished only when requested on the order.8. Product Analysis8.1 When requested on the purchase order, a product analysis shall be made by the manufac
31、turer. The chemical compositionthus determined shall conform to the requirements prescribed in Table 1 or Table 2 as modified by Table 3.8.2 The product analysis limits shown for carbon are not normally applicable to the MT grades.8.3 The number and source of samples for such product analysis shall
32、be based on the individual heat or lot identity of one ofthe following forms of material.8.3.1 Heat Identity MaintainedOne product analysis per heat on either a billet, a length of flat rolled stock, or a tube.8.3.2 Heat Identity Not MaintainedOne product analysis from one tube per 2000 ft (610 m) o
33、r less for sizes over 3 in. (76.2mm), 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 2 additional billets, 2 lengths of flat rolled stock, or 2 tubes shall bemade. Both retests for the
34、 elements in question shall meet the requirements of this specification; otherwise all remaining materialin the heat or lot shall be rejected, or at the option of the producer, each billet, length, flat rolled stock, or tube may be individuallytested for acceptance.8.5 Samples for product analysis,
35、except for spectrochemical analysis, analysis shall be taken in accordance with Practice A751,and the composition thus determined shall correspond to the requirements in the applicable section or table.9. Permissible Variations in Dimensions of Round Tubing9.1 Diameter and Wall Thickness:9.1.1 Varia
36、tions in outside diameter, inside diameter, and wall thickness shall not exceed the amounts prescribed in Table 4.TABLE 3 Tolerances for Product Analysis for Steels Shown inTable 1Element Limit, or Maximumof SpecifiedRange, %Variation, Over Maximum Limit orUnder Minimum LimitUnder min, % Over max, %
37、Carbon To 0.15, inclOver 01.50.020.030.030.04Manganese To 0.60, inclOver 0.600.030.040.030.04PhosphorusSulfur. . . . . . . . .0.010.01A512 1839.1.2 These variations apply to round, unannealed, and stress-relieved tubing.9.1.3 Diameter tolerance includes ovality.9.1.4 Sink tubing is normally ordered
38、by outside diameter and nominal wall. Mandrel-drawn tubing is normally ordered byoutside diameter and inside diameter and may be ordered by outside diameter or inside diameter and wall thickness but not by allthree dimensions.9.2 LengthRandom lengths between acceptable limits will be furnished, util
39、izing the full mill length. Tubing will be cut inhalf if specified. Full length random tubing will have a spread not exceeding 7 ft (2.1 m). Half-length random tubing will havea spread not exceeding 4 ft (1.2 m). Not more than 10 % of the total footage of a shipment may be furnished in lengths short
40、erthan the minimum specified but not less than 6 ft (1.8 m).9.2.1 When specified, multiple lengths will be furnished and should include allowances made for the customers cutting toolwidth and grippage. Maximum and minimum lengths may be specified with the understanding that not more than 10 % of the
41、 totalfootage in a shipment may be furnished in individual multiples cut to the customers specifications.9.2.2 Variations from the specified length shall not exceed the amounts prescribed in Table 5.9.3 Straightness:9.3.1 A round tube shall be considered straight provided that no 3-ft (0.9-m) sectio
42、n departs from a straight line by more than0.030 in. (0.76 mm).9.3.2 The straightness of round tubes shorter than 3 ft (0.9 m) 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 diameter tubing.TABLE
43、 4 Diameter and Wall Thickness Tolerances for Round TubingOutside Diameter Range, in. (mm) Outside Diameter, in. (mm) Inside Diameter, in. (mm) Wall Thickness, %Over Under Over Under Over UnderSunkUp to 12 (12.7), excl 0.004 (0.10) 0 . . . . . . 15A 1512 to 112 (12.7 to 38.1), excl 0.005 (0.13) 0 .
44、. . . . . 10A 10112 to 3 (38.1 to 76.2), incl 0.010 (0.25) 0 . . . . . . 10A 10Mandrel DrawnLess than 0.156 (3.96) wall:Up to 12 (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
45、(0.13) 0 0 0.005 (0.13)B 7 7Under 0.156 (3.96) wall:112 (38.1) and 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 7A Except at the weld line, where the weld pad may exceed this figure.B Tubes with an inside diameter under 12
46、 in. (12.7 mm) may require more than 0.005 in. (0.13 mm) inside diameter tolerance and the producer should be consulted.TABLE 5 Permissible Variations in LengthRound TubingLengths 4 ft (1.2 m) and underup to 2 in. (50.8 mm)diameter132 in. (0.8 mm)Lengths 4 ft (1.2 m) and underup to 2 in. (50.8 mm)di
47、ameter132 in. (0.8 mm)Lengths 4 ft (1.2 m) and underover 2 in. (50.8 mm)diameter364 in. (1.2 mm)Lengths 4 ft (1.2 m) and underover 2 in. (50.8 mm)diameter364 in. (1.2 mm)Lengths 4 ft to 10 ft (1.2 to 3.0 m), inclup to 2 in.(50.8 mm) diameter364 in. (1.2 mm)Lengths 4 ft to 10 ft (1.2 to 3.0 m), inclu
48、p to 2 in.(50.8 mm) diameter364 in. (1.2 mm)Lengths 4 ft to 10 ft (1.2 to 3.0 m), inclover 2 in.(50.8 mm) diameter116 in. (1.6 mm)Lengths 4 ft to 10 ft (1.2 to 3.0 m), inclover 2 in.(50.8 mm) diameter116 in. (1.6 mm)Lengths 10 ft to 24 ft (3.0 to 7.3 m), inclalldiameters18 in. (3.2 mm)Lengths 10 ft
49、to 24 ft (3.0 to 7.3 m), inclalldiameters18 in. (3.2 mm)Lengths over 24 ft (7.3 m)all diameters 18 in. (3.2 mm)AA Plus an additional tolerance of 116 (1.6 mm) for each 10 ft (3.0 m) or fractionover 24 ft (7.3 m).A512 18410. Permissible Variations in Dimensions of Square and Rectangular Tubing10.1 Outside Dimensions and Wall ThicknessVariations in largest outside dimensions across flats and wall thickness shall notexceed the amounts prescribed in Table 6.10.2 Corner R
