1、Designation: A554 14Standard 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.1. Scope*1.1 This specification covers welded austenitic and ferriticstainless steel mechanical tubing intended for use inornamental, structural, exhaust, a
3、nd other applications whereappearance, mechanical properties, or corrosion resistance isneeded. The grades covered are listed in Table 1.1.2 This specification covers as-welded or cold-reducedmechanical tubing in sizes to 16 in. (406.4 mm) outsidedimension, and in wall thicknesses 0.020 in. (0.51 mm
4、) 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 desired shall be so stated in the order.1.5 The values stated in inch-pound units are to
5、 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 Test Methods and Definitions for Mechanical Testingof Steel ProductsA751 Test Methods
6、, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsA941 Terminology Relating to Steel, Stainless Steel, RelatedAlloys, and Ferroalloys2.2 Military Standards:MIL-STD-129 Marking for Shipment and Storage3MIL-STD-163 Steel Mill Products Preparation for Shipmentand Storage32.3 Federal
7、Standard:Fed. Std. No. 123 Marking for Shipments (Civil Agencies)33. Terminology3.1 DefinitionsFor definitions of terms used in thisspecification, refer to Terminology A941.4. Ordering Information4.1 Orders for material under this specification shouldinclude the following, as required, to describe t
8、he 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 Dimensions:4.1.4.1 Round-outside diameter and wall thickness for allconditions (Section 9).
9、Alternatively, for cold-reducedcondition, outside diameter and inside diameter or insidediameter and wall dimensions may be specified,4.1.4.2 Square and rectangular outside dimensions and wallthickness (see 10.1),4.1.4.3 Special (to be specified),4.1.5 Length (mill lengths, cut lengths, or multiple
10、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 8),4.1.11 Individual supplementary requirements, if required,4.1.12 End use,4.1.13 Specificat
11、ion 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.5.2 If a specific type of melting is required by the purchaser,it shall be stated on the purchase order.1This specification is un
12、der the jurisdiction 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 July 1, 2014. Published July 2014. Originally approvedin 1965. Last previous edition ap
13、proved in 2013 as A55413. DOI: 10.1520/A0554-14.2For 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 fr
14、om Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 191115094, Attn: NPODS.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.3
15、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 heat shall be defined as allof the ingots remelted from a single primary heat.5.4 Steel may be cast
16、 in ingots or may be strand cast. Whensteel of different grades are sequentially strand cast, identifi-cation of the resultant transition material is required. Theproducer shall remove the transition material by an establishedprocedure that positively separates the grades.6. Materials and Manufactur
17、e6.1 The tubes shall be made from flat-rolled steel by anautomatic welding process without the addition of filler metal.TABLE 1 Chemical RequirementsUNS # GradeComposition, %Carbon,maxManga-nese,maxPhos-phorus,maxSulfur,maxSilicon,maxNickel Chromium Molybdenum Titanium Columbium+ TantalumNitrogenAus
18、teniticMT-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 8.011.0 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 0.0
19、8 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 24.026.0 . . .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-31
20、7 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 14.016.0 . . .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
21、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 . 5Cmin, .0.75 maxS40900 409DS40910 0.030 1.00 0.040 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.
22、10 0.030S40930 0.030 1.00 0.040 0.020 1.00 0.50 10.511.7 . (Ti+Cb) 0.08+8 (C+N) min,0.75 max;Ti 0.05 min. 0.030S43400 434 0.120 1.00 0.040 0.030 1.00 . 16.018.0 0.751.25 . . .S43600 436 0.120 1.00 0.040 0.030 1.00 . 16.018.0 0.751.25 . Cb5Cmin0.080 max.S43035 439 0.030 1.00 0.040 0.030 1.00 0.50 17.
23、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 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
24、 1.00 17.519.5 . 0.10.5 Cb 0.3+(9 C) min,0.9 max.AFor small diameter or thin walls, or both, where many drawing passes are required, a carbon content of 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 d
25、iameter 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 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
26、0.60 %.DS40900 (Type 409) has been replaced by S40910, S40920, and S40930. Unless otherwise specified in the ordering information, an order specifying S40900 or Type 409,shall be satisfied by any one of S40910, S40920, or S40930 at the option of the seller. Material meeting the requirements of S4091
27、0, S40920, or S40930 may, by agreementbetween purchaser and manufacturer, be certified as S40900.ES41003 chemical composition relates to Type 412, which 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 1427. Co
28、ndition7.1 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 diameter bead shall be furnished in any of thefollowing conditions as specified:7.2.1 Bead not removed,7.
29、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 cold worked unless otherwise specified.8. Heat Analysis8.1 An analysis of each heat of steel shall be made
30、 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 product of one remelted ingot of each primary melt. Thechemical composition thus determined, or that determ
31、inedfrom a product analysis made by the tubular productmanufacturer, shall conform to requirements specified. Whenrequested in the order or contract, a report of this analysis shallbe furnished to the purchaser. (See Test Methods, Practices,and Terminology A751.)9. Permissible Variations in Dimensio
32、nsRound 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 lengths 5ft (1.5 m) and over. Definite cut lengths are furnished whenspecified, to the length tolerances show
33、n 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 specifiedin the purchase order.9.4 Straightness ToleranceThe straightness toleranceshall be 0.030 in. (0.7
34、6 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 Variations in DimensionsSquare andRectangular Tubing10.1 For this tubing, variations in dimensions from t
35、hosespecified 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 Finished tubes shall have smooth ends free of burrs.They shall be free of injurious defects and shall have
36、 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 maximum and minimum outside diameters measured at any one cross section. There is no additionaltolerance
37、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 twice the tabular outside diameter tolerance spreadshown is applied one half plus and one half minus to tubes
38、 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 tolerances as shown in this table.NOTE 3For sizes over 5-in. (127.0-mm) to and including 16-in. (406.4-mm) outs
39、ide 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, in. 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
40、 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), 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
41、 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 to 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.
42、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 0.014 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), in
43、cl 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 0.64Over5to712 (127.0 to 190.5), incl 0.049 to 0.250 1.24 to 6.35 0.025 0.64Over5to712 (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 i
44、n./in. or mm/mm of circumferenceAWall tolerance 10 % of specified wall thickness.A554 143marks, straightening marks, light mandrel and die marks,shallow pits, and scale patterns will not be considered asserious defects, provided the imperfections are removablewithin 10 % of the specified wall or 0.0
45、02 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 If special surface conditioning is required, they shall bestated in the order.13. Rejection13.1 Tubing that fails
46、 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 special protection is needed, details shallbe specified in the order.15. Product Marking15.1 Civilian ProcurementEa
47、ch box, bundle or lift, andpiece (when individual pieces are shipped) shall be identifiedTABLE 3 Diameter, Wall,Aand Ovality Tolerances for Tubing withBead RemovedNOTE 1Ovality is the difference between maximum and minimumoutside diameters measured at any one cross section. There is noadditional tol
48、erance for ovality on tubes having a specified wall thicknessof more than 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 thicknes
49、s 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 diameter, inside diameter, or wall.OD Size, in. (mm) OD, ID, in. mm in. mmUp to332 (2.4), excl 0.001 0.03 0.001 0.03332 to316 (2.4 to 4.8), excl 0.0015 0.038 0.0015 0.038316 to12 (4.8 to 12.7), excl 0.003 0.08 0.005 0.131
