1、Designation: A554 11Standard Specification forWelded Stainless Steel Mechanical Tubing1This standard is issued under the fixed designation A554; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in
2、 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 Department of Defense.1. Scope*1.1 This specification covers welded austenitic and ferriticstainl
3、ess steel mechanical tubing intended for use in ornamen-tal, structural, exhaust, and other applications where appear-ance, mechanical properties, or corrosion resistance is needed.The grades covered are listed in Table 1.1.2 This specification covers as-welded or cold-reducedmechanical tubing in si
4、zes to 16 in. (406.4 mm) outsidedimension, and in wall thicknesses 0.020 in. (0.51 mm) andover.1.3 Tubes shall be furnished in one of the following shapesas specified by the purchaser: round, square, rectangular, orspecial.1.4 Supplementary requirements of an optional nature areprovided and when des
5、ired 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.2. Referenced Documents2.1 ASTM Standards:2A370
6、Test Methods and Definitions for Mechanical Testingof Steel ProductsA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsA941 Terminology Relating to Steel, Stainless Steel, Re-lated Alloys, and Ferroalloys2.2 Military Standards:MIL-STD-129 Marking for Shipment and S
7、torage3MIL-STD-163 Steel Mill Products Preparation for Ship-ment and Storage32.3 Federal Standard:Fed. Std. No. 123 Marking for Shipments (Civil Agencies)33. Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication, refer to Terminology A941.4. Ordering Information4.1 Orders fo
8、r material under this specification shouldinclude the following, as required, to describe the desiredmaterial adequately:4.1.1 Quantity (feet, mass, or number of pieces),4.1.2 Name of material (welded stainless steel mechanicaltubing),4.1.3 Form (round, square, rectangular, special, see 1.3),4.1.4 D
9、imensions:4.1.4.1 Round-outside diameter and wall thickness for allconditions (Section 9). Alternatively, for cold-reduced condi-tion, outside diameter and inside diameter or inside diameterand wall dimensions may be specified,4.1.4.2 Square and rectangular outside dimensions and wallthickness (see
10、10.1),4.1.4.3 Special (to be specified),4.1.5 Length (mill lengths, cut lengths, or multiple lengths(see 9.3),4.1.6 Grade (Table 1),4.1.7 Condition (see 7.1),4.1.8 Inside diameter bead condition (see 7.2),4.1.9 Surface finish (see Section 12),4.1.10 Report of chemical analysis, if required (Section
11、8),4.1.11 Individual supplementary requirements, if required,4.1.12 End use,4.1.13 Specification designation,4.1.14 Special requirements,4.1.15 Special marking (Section 15), and4.1.16 Special packing (Section 16).5. Process5.1 The steel may be made by any process.1This specification is under the jur
12、isdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved Oct. 15, 2011. Published November 2011. Originallyapproved in 1965. Last previous edition approved
13、 in 2010 as A55410. DOI:10.1520/A0554-11.2For 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 Stan
14、dardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 191115094, Attn: NPODS.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.5.2 If a
15、specific type of melting is required by the purchaser,it shall be stated on the purchase order.5.3 The primary melting may incorporate separate degas-sing or refining and may be followed by secondary melting,such as electroslag remelting or vacuum-arc remelting. Ifsecondary melting is employed, the
16、heat shall be defined as allof the ingots remelted from a single primary heat.5.4 Steel may be cast in ingots or may be strand cast. Whensteel of different grades are sequentially strand cast, identifi-cation of the resultant transition material is required. TheTABLE 1 Chemical RequirementsUNS # Gra
17、deComposition, %Carbon,maxManga-nese,maxPhos-phorus,maxSulfur,maxSilicon,maxNickel Chromium Molybdenum Titanium Columbium+ TantalumNitrogenAusteniticMT-301 0.15 2.00 0.045 0.030 1.00 6.08.0 16.018.0 . . .MT-302 0.15 2.00 0.045 0.030 1.00 8.010.0 17.019.0 . . .MT-304 0.08 2.00 0.045 0.030 1.00 8.011.
18、0 18.020.0 . . .MT-304L 0.035A2.00 0.045 0.030 1.00 8.013.0 18.020.0 . . .MT-305 0.12 2.00 0.045 0.030 1.00 10.013.0 17.019.0 . . .MT-309S 0.08 2.00 0.045 0.030 1.00 12.015.0 22.024.0 . . . . .MT-309S-Cb 0.08 2.00 0.045 0.030 1.00 12.015.0 22.024.0 . .BMT-310S 0.08 2.00 0.045 0.030 1.00 19.022.0 24.
19、026.0 . . .MT-316 0.08 2.00 0.045 0.030 1.00 10.014.0 16.018.0 2.03.0 . .MT-316L 0.035A2.00 0.045 0.030 1.00 10.015.0 16.018.0 2.03.0 . .MT-317 0.08 2.00 0.045 0.030 1.00 11.014.0 18.020.0 3.04.0 . .MT-321 0.08 2.00 0.045 0.030 1.00 9.013.0 17.020.0 .C.MT-330 0.15 2.00 0.040 0.030 1.00 33.036.0 14.0
20、16.0 . . .MT-347 0.08 2.00 0.045 0.030 1.00 9.013.0 17.020.0 . .BFerriticMT-429 0.12 1.00 0.040 0.030 1.00 0.50 max 14.016.0 . . .MT-430 0.12 1.00 0.040 0.030 1.00 0.50 max 16.018.0 . . .MT-430-Ti 0.10 1.00 0.040 0.030 1.00 0.075 max 16.019.5 . 5 3 C min, .0.75 maxS40900 409DS40910 0.030 1.00 0.040
21、0.020 1.00 0.50 10.511.7 . Ti 6X (C+N)min,0.050 maxCb 0.17 0.030S40920 0.030 1.00 0.040 0.020 1.00 0.50 10.511.7 . Ti 8X (C+N)min,Ti 0.150.50Cb 0.10 0.030S40930 0.030 1.00 0.040 0.020 1.00 0.50 10.511.7 . (Ti+Cb) 0.08+83(C+N) min,0.75 max;Ti 0.05 min0.75 max. 0.030S43400 434 0.120 1.00 0.040 0.030 1
22、.00 . 16.018.0 0.751.25 . . .S43600 436 0.120 1.00 0.040 0.030 1.00 . 16.018.0 0.751.25 . Cb 5 3 Cmin0.080 max.S43035 439 0.030 1.00 0.040 0.030 1.00 0.50 17.019.0 . Ti0.20+4(C+N)min,1.10 max;Al 0.015. 0.030S41003E0.030 1.50 0.040 0.030 1.00 1.50 10.512.5 . . . 0.030S44400 444 0.025 1.00 0.040 0.030
23、 1.00 1.00 17.519.5 1.752.50 (Ti+Cb)0.20+4(C+N)min0.80 max0.035S41008 410S 0.080 1.00 0.040 0.030 1.00 0.60 11.513.5 . . . .S44100F0.030 1.00 0.040 0.030 1.00 1.00 17.519.5 . 0.10.5 Cb 0.3+(93 C).AFor small diameter or thin walls, or both, where many drawing passes are required, a carbon content of
24、0.040 % max is necessary in grades MT-304L and MT-316L.Small outside diameter tubes are defined as those less than 0.500 in. (12.7 mm) in outside diameter and light wall tubes as those less than 0.049 in. (1.24 mm) in averagewall thickness.BThe columbium plus tantalum content shall be not less than
25、ten times the carbon content and not more than 1.00 %.CThe titanium content shall be not less than five times the carbon content and not more than 0.60 %.DS40900 (Type 409) has been replaced by S40910, S40920, and S40930. Unless otherwise specified in the ordering information, an order specifying S4
26、0900 or Type409, shall be satisfied by any one of S40910, S40920, or S40930 at the option of the seller. Material meeting the requirements of S40910, S40920, or S40930 may, byagreement between purchaser and manufacturer, be certified as S40900.ES41003 chemical composition relates to Type 412, which
27、is not currently an AISI or SAE number.FS44100 chemical composition relates to Type 441, which is not currently an AISI or SAE number.A554 112producer shall remove the transition material by an establishedprocedure that positively separates the grades.6. Materials and Manufacture6.1 The tubes shall
28、be made from flat-rolled steel by anautomatic welding process without the addition of filler metal.7. Condition7.1 The tubes shall be furnished in any of the followingconditions as specified:7.1.1 As welded,7.1.2 Welded and annealed,7.1.3 Cold reduced,7.1.4 Cold reduced and annealed.7.2 The inside d
29、iameter bead shall be furnished in any of thefollowing conditions as specified:7.2.1 Bead not removed,7.2.2 Bead controlled to 0.005 in. (0.13 mm) or 15 % of thespecified wall thickness, whichever is greater, and7.2.3 Bead removed.7.3 Square and rectangular welded stainless tubing is sup-plied as co
30、ld worked unless otherwise specified.8. Heat Analysis8.1 An analysis of each heat of steel shall be made by thesteel manufacturer to determine the percentages of the ele-ments specified. If secondary melting processes are employed,the heat analysis shall be obtained from one remelted ingot orthe pro
31、duct of one remelted ingot of each primary melt. Thechemical composition thus determined, or that determinedfrom a product analysis made by the tubular product manufac-turer, shall conform to requirements specified. When requestedin the order or contract, a report of this analysis shall befurnished
32、to the purchaser. (See Test Methods, Practices, andTerminology A751.)9. Permissible Variations in DimensionsRound Tubing9.1 For all conditions except tubing with bead removed,Table 2 shall apply.9.2 For tubing with bead removed, Table 3 shall apply.9.3 LengthsTubing is normally furnished in mill len
33、gths 5ft (1.5 m) and over. Definite cut lengths are furnished whenspecified, to the length tolerances shown in Table 4. For tubingordered in multiple lengths, it is common practice to allow adefinite amount over for each multiple for the purchaserscutting operation. Thus cutting allowance should be
34、specifiedin the purchase order.9.4 Straightness ToleranceThe straightness toleranceshall be 0.030 in. (0.76 mm) maximum in any 3-ft (0.9-m)length of tubing. The straightness tolerance on shorter lengthsand on special requirements shall be agreed upon between thepurchaser and producer.10. Permissible
35、 Variations in DimensionsSquare andRectangular Tubing10.1 For this tubing, variations in dimensions from thosespecified shall not exceed the amounts prescribed in Table 5.For lengths, see 9.3. For the measurement of corner radii inTable 5, refer to Fig. 1.11. Workmanship, Finish, and Appearance11.1
36、Finished tubes shall have smooth ends free of burrs.They shall be free of injurious defects and shall have aworkmanlike finish. Surface imperfections such as handlingTABLE 2 Diameter, Wall,Aand Ovality Tolerances (All Conditions Except Tubing with Bead Removed)NOTE 1Ovality is the difference between
37、 maximum and minimum outside diameters measured at any one cross section. There is no additionaltolerance for ovality on tubes having a specified wall thickness of more than 3 % of the outside diameter.NOTE 2For sizes up to and including 5-in. (127.0-mm) outside diameter, an ovality tolerance of twi
38、ce the tabular outside diameter tolerance spreadshown is applied one half plus and one half minus to tubes having a specified wall thickness of 3 % or less of the specified outside diameter. The averageof the maximum and minimum outside diameter readings should fall within the outside diameter toler
39、ances as shown in this table.NOTE 3For sizes over 5-in. (127.0-mm) to and including 16-in. (406.4-mm) outside diameter, when the specified wall thickness is 3 % or less of theoutside diameter, the ovality shall not exceed 1.5 % of the specified outside diameter.OD Size, in. (mm)Wall Thickness OD, 6i
40、n. mm in. mmUnder12 (12.7) 0.020 to 0.049 0.51 to 1.24 0.004 0.1012 to 1 (12.7 to 25.4) 0.020 to 0.065 0.51 to 1.65 0.005 0.1312 to 1 (12.7 to 25.4) over 0.065 to 0.134 over 1.65 to 3.40 0.010 0.25Over 1 to 112 (25.4 to 38.1), incl 0.025 to 0.065 0.64 to 1.65 0.008 0.20Over 1 to 112 (25.4 to 38.1),
41、incl over 0.065 to 0.134 over 1.65 to 3.40 0.010 0.25Over 112 to 2 (38.1 to 50.8), incl 0.025 to 0.049 0.64 to 1.24 0.010 0.25Over 112 to 2 (38.1 to 50.8), incl over 0.049 to 0.083 over 1.24 to 2.11 0.011 0.28Over 112 to 2 (38.1 to 50.8), incl over 0.083 to 0.149 over 2.11 to 3.78 0.012 0.30Over 2 t
42、o 212 (50.8 to 63.5), incl 0.032 to 0.065 0.81 to 1.65 0.012 0.30Over 2 to 212 (50.8 to 63.5), incl over 0.065 to 0.109 over 1.65 to 2.77 0.013 0.33Over 2 to 212 (50.8 to 63.5), incl over 0.109 to 0.165 over 2.77 to 4.19 0.014 0.36Over 212 to 312 (63.5 to 88.9), incl 0.032 to 0.165 0.81 to 4.19 0.01
43、4 0.36Over 212 to 312 (63.5 to 88.9), incl over 0.165 over 4.19 0.020 0.51Over 312 to 5 (88.9 to 127.0), incl 0.035 to 0.165 0.89 to 4.19 0.020 0.51Over 312 to 5 (88.9 to 127.0), incl over 0.165 over 4.19 0.025 0.64Over 5 to 712 (127.0 to 190.5), incl 0.049 to 0.250 1.24 to 6.35 0.025 0.64Over 5 to
44、712 (127.0 to 190.5), incl over 0.250 over 6.35 0.030 0.76Over 712 to 16 (190.5 to 406.4), incl all all 0.00125 in./in. or mm/mm of circumferenceAWall tolerance 610 % of specified wall thickness.A554 113marks, straightening marks, light mandrel and die marks,shallow pits, and scale patterns will not
45、 be considered asserious defects, provided the imperfections are removablewithin 10 % of the specified wall or 0.002 in. (0.05 mm),whichever is greater. The removal of surface imperfections isnot required, unless special finishes are specified.12. Surface Finish12.1 Tubes shall be free of scale.12.2
46、 If special surface conditioning is required, they shall bestated in the order.13. Rejection13.1 Tubing that fails to meet the requirements of thisspecification shall be set aside and the manufacturer notified.14. Coating14.1 Stainless steel tubing is commonly shipped withoutprotective coating. If s
47、pecial protection is needed, details shallbe specified in the order.15. Product Marking15.1 Civilian ProcurementEach box, bundle or lift, andpiece (when individual pieces are shipped) shall be identifiedby a tag or stencil with the manufacturers name or brand,specified size, purchasers order number,
48、 this specificationTABLE 3 Diameter, Wall,Aand Ovality Tolerances for Tubingwith Bead RemovedNOTE 1Ovality is the difference between maximum and minimumoutside diameters measured at any one cross section. There is noadditional tolerance for ovality on tubes having a specified wall thicknessof more t
49、han 3 % of the outside diameter.NOTE 2An ovality allowance of twice the outside diameter tolerance,shown in this table, is applied one half plus and one half minus to theoutside diameter, for tubes having a specified wall thickness of 3 % or lessof the specified outside diameter. The average of the maximum andminimum outside diameter readings should fall within the outsidediameter tolerances of this table.NOTE 3Tubing may be specified to only two of the three followingdimensionsoutside diam
