1、Designation: A632 04 (Reapproved 2014)Standard Specification forSeamless and Welded Austenitic Stainless Steel Tubing(Small-Diameter) for General Service1This standard is issued under the fixed designation A632; the number immediately following the designation indicates the year oforiginal adoption
2、or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers grades of stainless steel tubingin sizes under12 do
3、wn to 0.050 in. (12.7 to 1.27 mm) in outsidediameter and wall thicknesses less than 0.065 in. down to 0.005in. (1.65 to 0.13 mm) for general corrosion-resisting and low-or high-temperature service, as designated in Table 1.NOTE 1The grades of austenitic stainless steel tubing furnished inaccordance
4、with this specification have been found suitable for low-temperature service down to 325F (200C) in which Charpy notched-bar impact values of 15 ftlbf (20 J), minimum, are required and thesegrades need not be impact tested.1.2 Optional supplementary requirements are provided and,when desired, shall
5、be so stated in the order.1.3 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.2. Referenced Documents2.1 ASTM Standards:2A262 Practices f
6、or Detecting Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA380 Practice for Cleaning, Descaling, and Passivation ofStainless Steel Parts, Equipment, and SystemsE165 Practice for Liquid Penetrant Examination for GeneralIndustryE527 Practice for Numbering Metals and Alloys in th
7、eUnified Numbering System (UNS)2.2 SAE Standard:SAE J 1086 Practice for Numbering Metals and Alloys(UNS)33. Ordering Information3.1 Orders for product under this specification should in-clude the following, as required, to describe the desiredmaterial adequately:3.1.1 Quantity (feet or number of len
8、gths),3.1.2 Name of product (seamless or welded tubes),3.1.3 Grade (see Table 1),3.1.4 Size (only two of the following: outside diameter,inside diameter, and average wall),3.1.5 Length (specific or random),3.1.6 Optional requirements (check analysis, see Section 7;hydrostatic, air underwater pressur
9、e test, or nondestructiveelectric test, see Section 13),3.1.7 Test report required,3.1.8 Specification designation, and3.1.9 Special requirements or any supplementary require-ments selected, or both.4. General Requirements4.1 Tubing furnished under this specification shall conformto the applicable r
10、equirements of the current edition of Speci-fication E165, unless otherwise provided herein.5. Manufacture5.1 ManufactureThe tubes shall be cold finished and shallbe made by the seamless or welded process.5.2 Heat TreatmentAll material shall be furnished in theheat-treated condition. The heat-treatm
11、ent procedure shallconsist of heating the material to a minimum temperature of1800F (980C) and quenching in water or rapidly cooling byother means.6. Chemical Composition6.1 The steel shall conform to the requirements as tochemical composition as specified in Table 1.7. Product Analysis7.1 When spec
12、ified on the purchase order, an analysis ofeither one billet or one length of flat-rolled stock or one tubeshall be made from each heat. The chemical composition thusdetermined shall conform to the specified requirements.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,St
13、ainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved Oct. 1, 2014. Published October 2014. Originallyapproved in 1969. Last previous edition approved in 2009 as A632 04 (2009).DOI: 10.1520/A0632
14、-04R14.2For 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 Summary page onthe ASTM website.3Available from SAE International (SAE), 400 Commonwea
15、lth Dr., Warrendale,PA 15096-0001, http:/www.sae.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17.2 If the analysis made in accordance with 7.1 does notconform to the specified requirements, an analysis of eachbillet or length of
16、 flat-rolled stock or tube from the same heatmay be made and all billets, stock, or tubes thus conforming tothe requirements shall be accepted so far as chemical compo-sition is concerned.8. Mechanical Properties8.1 Tensile RequirementsThe material shall conform tothe requirements as to tensile prop
17、erties specified in Table 2.These mechanical properties apply to tubing18 in. (3.2 mm)and larger in outside diameter by 0.015 in. (0.38 mm) in wallthickness and heavier. Smaller sizes are available meeting theminimum tensile strength specified in Table 2; however, yieldstrength is not generally dete
18、rmined on such sizes, and theminimum elongation shall be 25 %.9. Permissible Variations in Dimensions9.1 Variations in diameter and wall thickness from thosespecified shall not exceed the amounts specified in Table 3.10. Surface Condition10.1 The tubes shall be pickled free of scale. When brightanne
19、aling is used, pickling is not required.11. Number of Tests11.1 For each lot of 100 finished tubes or fraction thereof,two tubes shall be selected at random for the flaring test (seeNote 2).11.2 One tension test shall be made on a specimen for lotsof not more than 50 tubes. Tension tests shall be ma
20、de onspecimens from two tubes for lots of more than 50 tubes (seeNote 3).NOTE 2For flaring requirements, the term lot applies to all tubes of thesame nominal size and wall thickness that are produced from the sameheat of steel and subjected to the same finishing treatment in a continuousfurnace; whe
21、n final heat treatment is in a batch-type furnace, the lot shallinclude only those tubes that are heat treated in the same furnace charge.NOTE 3For tensile requirements, the term lot applies to all tubes priorto cutting, of the same nominal diameter and wall thickness that areproduced from the same
22、heat of steel. When final heat treatment is in abatch-type furnace, a lot shall include only those tubes of the same sizeand the same heat that are heat treated in the same furnace charge. Whenthe final heat treatment is in a continuous furnace, a lot shall include alltubes of the same size and heat
23、, heat treated in the same furnace at thesame temperature, time at heat and furnace speed.11.3 When more than one heat is involved, the test require-ments prescribed in 12.1 shall apply to each heat.11.4 Each tube shall be subjected to a pressure test or thenondestructive test described in Section 1
24、3.12. Flaring Test12.1 Flaring TestA section of tube approximately 4 in.(101.6 mm) in length shall stand being flared with a tool havinga 60 included angle until the tube at the mouth of the flare hasbeen expanded to the following percentages without crackingor showing flaws:TABLE 1 Chemical Require
25、mentsElementComposition, %Grade TP 304 TP 304L TP 310 TP 316 TP 316L TP 317 TP 321 TP 347 TP 348UNSDesignationAS30400 S30403 S31000 S31600 S31603 S31700 S32100 S34700 S34800Carbon, max 0.08 0.030 0.15 0.08 0.030 0.08 0.08 0.08 0.08Manganese max 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00Phosphorus,
26、 max 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.045 0.045Sulfur, max 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030Silicon, max 0.75 0.75 0.75 0.75 0.75B0.75 0.75 0.75 0.75Nickel 8.011.0 8.013.0 19.022.0 11.014.0C10.015.0 11.014.0 9.013.0 9.013.0 9.013.0Chromium 18.020.0 18.020.0 24.026.0 16
27、.018.0 16.018.0 18.020.0 17.020.0 17.020.0 17.020.0Molybdenum . . . 2.003.00 2.003.00 3.004.00 . . .Titanium . . . . . .D. .Columbium + tantalum . . . . . . .EETantalum, max . . . . . . . . 0.10ANew designation established in accordance with Practice E527 and SAE J 1086, Practice for Numbering Metal
28、s and Alloys (UNS).BFor seamless TP316L tubes, the silicon maximum shall be 1.00 %.CFor welded TP 316 tubes, the nickel range shall be 10.014.0 %.DGrade TP 321 shall have a titanium content of not less than five times the carbon content and not more than 0.60 %.EGrades TP 347 and TP 348 shall have a
29、 columbium plus tantalum content of not less than ten times the carbon content and not more than 1.0 %.TABLE 2 Tensile RequirementsTensile strength, min, ksi (MPa) 75A(515)AYield strength, min, ksi (MPa) 30A,B(205)A,BElongation in 2 in. or 50 mm, min, % 35BAGrades TP 304L and TP 316L shall have a mi
30、nimum tensile strength of 70 ksi(485 MPa) and a minimum yield strength of 25 ksi (170 MPa).BYield strength is not generally determined on tubing sizes smaller than18 in. (3.2mm) in outside diameter or thinner than 0.015 in. (0.38 mm) wall, so yield strengthis not required on such sizes. Also, the mi
31、nimum elongation required on thesesmaller or thinner sizes is 25 %.TABLE 3 Permissible Variations in DimensionsOutside Diameter RangeOutsideDiameter,in. (mm)InsideDiameter,in. (mm)Wall,plusandminus, %Up to, but not including332(0.094) in. (2.38 mm)+0.002 (0.05)0.000+0.0000.002 (0.05)10332 (0.094) in
32、. (2.38 mm) butnot including316 (0.188)in. (4.76 mm)+0.003 (0.08)0.000+0.0000.003 (0.08)10316 to, but not including,12(0.500) in. (12.70 mm)+0.004 (0.10)0.000+0.0000.004 (0.10)10A632 04 (2014)2Ratio of Inside Diameterto Outside DiameterMinimum Expansion ofInside Diameter, %0.9 210.8 220.7 250.6 300.
33、5 390.4 510.3 68NOTE 4These flare tests shall not be required on sizes under 0.093 in.(2.38 mm) in inside diameter.13. Hydrostatic, Air Underwater Pressure Test, orNondestructive Electric Test13.1 Each tube shall be subjected to the hydrostatic test, airunderwater pressure test, or nondestructive el
34、ectric test. Thetype of test to be used shall be at the option of themanufacturer, unless otherwise specified in the purchase order.13.2 Hydrostatic TestEach tube shall be subjected to ahydrostatic test at a test pressure not exceeding 1000 psi (6.89MPa).13.3 Air Underwater Pressure TestEach tube sh
35、all besubjected to an air underwater pressure test, at a test pressureas given by the following equation or 500 psi (3.4 MPa),whichever is less:P 5 2St/D (1)where:P = air pressure, psi or MPaS = allowable fiber stress of 16,000 psi (110.3 MPa),t = specified wall thickness, in. or mm, andD = specifie
36、d outside diameter, in. or mm.13.4 Nondestructive Electric Test:13.5 Each tube shall be subjected to a nondestructiveelectric test that is capable of detecting imperfections with adepth exceeding 10 % of the wall thickness or 0.002 in. (0.05mm), whichever is greater. Testing will not be required on
37、sizesunder 0.125 in. (3.18 mm) in outside diameter. However, at theoption of the purchaser, tubing to be drawn to a diameter under0.125 in. may be tested while in the range from 0.156 in. (3.97mm) to 0.125 in. outside diameter, and any defects that arefound shall be culled out before any further red
38、uctions aremade.14. Keywords14.1 austenitic stainless steel; seamless tube; small diam-eter; stainless steel tube; steel tube; welded steel tubeSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall apply only when specified by the purchaser in theinquiry, contract, or order.S1. Dy
39、e Penetrant InspectionS1.1 Each tube shall be submitted to a visible dye orfluorescent dye penetrant examination. The procedure for thisspecification shall conform to Test Method E165. The typepenetrant and the acceptance level shall be agreed uponbetween the purchaser and manufacturer.S2. Embrittle
40、ment TestS2.1 Tubing shall be capable of meeting the intergranularcorrosion test specified in Practice E of Practices A262 in theas-shipped condition. Stabilized and low-carbon grades shallbe capable of meeting the requirements of this test in thesensitized condition (1 h at 1240F 675C).S3. Cleanlin
41、essS3.1 When specified, tubing shall be supplied thermocoupleclean on the inside surface. Thermocouple clean is defined asbeing free of all drawing compounds, carbon, dirt, dust, visiblesurface oxides, scale, and other contaminants.S3.1.1 Verify the freedom from inside visible surface oxidesand scal
42、e by cutting two short lengths of tubing as specimensand longitudinally sectioning both. Pickle one of the specimensin accordance with Specification A380 and then wash both.Visually, without magnification, compare the pickled andunpickled specimens to confirm that neither exhibits surfaceoxides or s
43、cale on their inside surfaces.S3.1.2 Verify cleanliness and freedom from contaminants,such as drawing compounds, carbon, dirt, and dust, by passinga solvent-saturated swatch of lint-free yarn or cloth, or a feltplug through the tube. Isopropyl alcohol, methanol, ethanol,denatured alcohol, or acetone
44、 followed by alcohol are accept-able solvents. Because acetone leaves a residual film, cleaningwith acetone alone is not acceptable. While a heavy discolor-ation of the swatch or plug is unacceptable, a light discolor-ation is acceptable unless particles of grit or metallic flakes arevisually detect
45、able without the use of magnification.S3.2 After verifying that the inside surface is thermocoupleclean, the tubing shall be capped or otherwise protected toensure cleanliness upon arrival at its destination. The producerand purchaser shall agree on the method of protection.S4. Unstraightened TubesS
46、4.1 When the purchaser specifies tubes unstraightenedafter final heat treatment (such as coils), the minimum yieldstrength of Table 2 shall be reduced by 5 ksi.S4.2 On the certification, and wherever the grade designa-tion for unstraightened tubing appears, it shall be identifiedwith the suffix lett
47、er U (for example, 304-U, 321-U, and soforth.).A632 04 (2014)3ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such
48、patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited
49、either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,U
