1、Designation: A 632 04Standard Specification forSeamless and Welded Austenitic Stainless Steel Tubing(Small-Diameter) for General Service1This standard is issued under the fixed designation A 632; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers grades of stainless steel tubingin sizes under12 down to 0.050 in
3、. (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 with this spec
4、ification 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 be so stated i
5、n the order.1.3 The values stated in inch-pound units are to be regardedas the standard.2. Referenced Documents2.1 ASTM Standards:2A 262 Practices for Detecting Susceptibility to Intergranu-lar Attack in Austenitic Stainless SteelsA 380 Practice for Cleaning, Descaling, and Passivation ofStainless S
6、teel Parts, Equipment, and SystemsA 1016/A 1016M Specification for General Requirementsfor Ferritic Alloy Steel, Austenitic Alloy Steel, and Stain-less Steel TubesE 165 Test Method for Liquid Penetrant ExaminationE 527 Practice for Numbering Metals and Alloys (UNS)2.2 SAE Standard:SAE J 1086 Practic
7、e 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 lengths),3.1.2 Name of product (seamless or welded tubes),3.1.3 Grade
8、 (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 pressure test, or nondestructiveelectric test, see Section 13),3.1.7 Test
9、 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 requirements of the current edition of Speci-fication A 1016/A 1016
10、M, 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-treatment procedure shallconsist of heating the material to a
11、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 1.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless S
12、teel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved March 1, 2004. Published March 2004. Originallyapproved in 1969. Last previous edition approved in 2002 as A 632 02a.2For referenced ASTM standards, v
13、isit 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 Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 150
14、96-0001.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Product Analysis7.1 When specified on the purchase order, an analysis ofeither one billet or one length of f
15、lat-rolled stock or one tubeshall be made from each heat. The chemical composition thusdetermined shall conform to the specified requirements.7.2 If the analysis made in accordance with 7.1 does notconform to the specified requirements, an analysis of eachbillet or length of flat-rolled stock or tub
16、e 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 properties specified in Table
17、 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 determined on such sizes, and
18、 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 brightannealing is used, pickling i
19、s 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 made onspecimens from two t
20、ubes for lots of more than 50 tubes (seeNote 3).NOTE 2For flaring requirements, the term lot applies to all tubes ofthe same nominal size and wall thickness that are produced from the sameheat of steel and subjected to the same finishing treatment in a continuousfurnace; when final heat treatment is
21、 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 heat of steel. When final
22、 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, heat treated in the sam
23、e 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 13.12. Flaring Test12.1 Fl
24、aring TestA section of tube approximately 4 in.(101.6 mm) in length shall stand being flared with a tool havingTABLE 1 Chemical RequirementsElementComposition, %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 S3470
25、0 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, 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
26、 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 16.018.0 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 . . . . . . .EETanta
27、lum, max . . . . . . . . 0.10ANew designation established in accordance with Practice E 527 and SAE J 1086, Practice for Numbering Metals 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 shal
28、l 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 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)
29、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 minimum 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 than1
30、8 in.(3.2 mm) in outside diameter or thinner than 0.015 in. (0.38 mm) wall, so yieldstrength is not required on such sizes. Also, the minimum elongation required onthese smaller or thinner sizes is 25 %.TABLE 3 Permissible Variations in DimensionsOutside Diameter RangeOutsideDiameter,in. (mm)InsideD
31、iameter,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. (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+0.000
32、0.004 (0.10)10A632042a 60 included angle until the tube at the mouth of the flare hasbeen expanded to the following percentages without crackingor showing flaws:Ratio of Inside Diameterto Outside DiameterMinimum Expansion ofInside Diameter, %0.9 210.8 220.7 250.6 300.5 390.4 510.3 68NOTE 4These flar
33、e 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 electric test. Thetype of test to
34、be used shall be at the option of the manufac-turer, unless otherwise specified in the purchase order.13.2 Hydrostatic Test:Each tube shall be subjected to a hydrostatic test at a testpressure not exceeding 1000 psi (6.89 MPa).13.3 Air Underwater Pressure Test:Each tube shall be subjected to an air
35、underwater pressuretest, at a test pressure as given by the following equation or 500psi (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 = specified outside diameter, in.
36、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 sizesunder 0.125 in. (3.
37、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 reductions aremade.14. Keyw
38、ords14.1 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. Dye Penetrant InspectionS1
39、.1 Each tube shall be submitted to a visible dye orfluorescent dye penetrant examination. The procedure for thisspecification shall conform to Test Method E 165. The typepenetrant and the acceptance level shall be agreed uponbetween the purchaser and manufacturer.S2. Embrittlement TestS2.1 Tubing sh
40、all be capable of meeting the intergranularcorrosion test specified in Practice E of Practices A 262 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. CleanlinessS3.1 When specified
41、, 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 scale by cutting two short
42、 lengths of tubing as specimensand longitudinally sectioning both. Pickle one of the specimensin accordance with Specification A 380 and then wash both.Visually, without magnification, compare the pickled andunpickled specimens to confirm that neither exhibits surfaceoxides or scale on their inside
43、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 followed by alcohol
44、are accept-able solvents. Because acetone leaves a residual film, cleaningwith acetone alone is not acceptable. While a heavy discolora-tion of the swatch or plug is unacceptable, a light discolorationis acceptable unless particles of grit or metallic flakes arevisually detectable without the use of
45、 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 TubesS4.1 When the purchaser
46、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 letter U (for example, 304-
47、U, 321-U, and soforth.).A632043SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this specification since the last issue,A 632 02a, that may impact the use of this specification. (Approved March 1, 2004)(1) Added reference to Specification A 380 in ReferencedDocument
48、s and Supplementary Requirement S3.Committee A01 has identified the location of selected changes to this specification since the last issue, A 632 02, that mayimpact the use of this specification. (Approved September 10, 2002)(1) Reference to Specification A 1016/A 1016M has beenadded.(2) References
49、 to Test Methods and Definitions A 370, Termi-nology A 941, and Test Methods A 751 have been deleted fromSection 2 and throughout the standard.(3) Section 12 was renamed from “Manipulation Test” to“Flaring Test.”(4) Section on Terminology was deleted.(5) Section on General Requirements was added.(6) Paragraphs 7.1 and 7.2 were revised.(7) Sections on Retests, Retreatment, Test Specimens and TestMethods, Inspection, Rejection, Certification, and ProductMarking were deleted.(8) Section 13 was revised.ASTM International takes n
