1、Steel, Corrosion and Heat-Resistant, Welded Tubing18Cr - 10.5Ni - 0.70Cb (SAE 30347)Thin WallSolution Heat Treated(Composition similar to UNS S34700)1. SCOPE:1.1 Form: This specification covers a corrosion and heat-resistant steel in the form of welded tubing.1.2 Application: This tubing has been us
2、ed typically for high-pressure air ducting requiring both corrosion and heat resistance, especially when such ducting is welded during fabrication, and when the wall thickness is approximately 2% or less of the OD, but usage is not limited to such applications.2. APPLICABLE DOCUMENTS: The issue of t
3、he following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no sup
4、erseding document has been specified, the last published issue of that document shall apply.2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org.AMS 2248 Chemical Check Analysis Limits, Corrosion and Heat-Resistant Steels and Alloys, Maraging and
5、 Other Highly Alloyed Steels, and Iron AlloysAMS 2371 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steels and Alloys, Wrought Products and Forging StockAEROSPACE MATERIAL SPECIFICATIONAMS 5558GIssued JAN 1958Revised JUL 2003Superseding AMS 5558FSAE Technical Standards Board R
6、ules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility
7、of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2008 SAE International All rights reserved. No part of this publication may be reproduced, stored in a ret
8、rieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: Custome
9、rServicesae.org SAE WEB ADDRESS: http:/www.sae.org Reaffirmed MAY 2008Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5558G SAE AMS 5558G- 2 -2.1 (Continued):AMS 2634 Ultrasonic Inspection, Thin
10、Wall Metal TubingAMS 2807 Identification, Carbon and Low-Alloy Steels, Corrosion and Heat-Resistant Steels and Alloys, Sheet, Strip, Plate, and Aircraft TubingAS4194 Sheet and Strip Surface Finish Nomenclature2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19
11、428-2959 orwww.astm.org.ASTM A 262 Detecting Susceptibility to Intergranular Attack in Austenitic Stainless SteelsASTM A 370 Mechanical Testing of Steel ProductsASTM A 480/A 480M Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and StripASTM E 353 Chemical Analysis of Stainless, Heat-Res
12、isting, Maraging, and Other Similar Chromium-Nickel-Iron AlloysASTM E 1742 Radiographic Examination3. TECHNICAL REQUIREMENTS: 3.1 Composition: Shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM E 353, by spectrochemical methods, or
13、 by other analytical methods acceptable to purchaser.3.1.1 Check Analysis: Composition variations shall meet the applicable requirements of AMS 2248.TABLE 1 - CompositionElement min maxCarbon - 0.08Manganese - 2.00Silicon 0.30 1.00Phosphorus - 0.040Sulfur - 0.030Chromium 17.00 19.00Nickel 9.00 12.00
14、Columbium 10xC 1.10Molybdenum - 0.75Copper - 0.75Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5558G SAE AMS 5558G- 3 -3.2 Condition: Solution heat treated, and, unless solution heat treatment
15、is performed in an atmosphere yielding a bright finish, pickled as required or passivated. Tubing shall have been cold worked sufficiently to meet the dimensional requirements of 3.5.4 and 3.6.3.3.3 Fabrication: Tubing shall be machine fusion welded, shall contain no more than one longitudinal weld,
16、 and shall contain no circumferential welds. Tube ends shall be cut square and deburred. Tubing, except for the weld reinforcement, shall have a surface appearance in accordance with ASTM A 480/A 480M and AS4194 comparable to a No. 2D sheet finish.3.4 Properties: Tubing shall conform to the followin
17、g requirements; tensile and bend testing shall be performed in accordance with ASTM A 370:3.4.1 Tensile Properties: Shall be as shown in Table 2.3.4.2 Bending: A specimen as in 4.3.2 shall withstand, without showing cracks or other imperfections when examined using 8 to 12X magnification, bending at
18、 room temperature flat on itself with axis of bend perpendicular to axis of weld and with inside of tube on either inside or outside of bend.3.4.3 Weld Crack Susceptibility: A specimen as in 4.3.3 shall withstand, without evidence of cracks occurring on, or adjacent to, the weld bead when examined u
19、sing 8 to 12X magnification, being pulled parallel to the direction of the weld bead until rupture occurs.3.4.4 Susceptibility to Intergranular Attack: Specimens of tubing taken to include the weld, after sensitization treatment, shall pass the intergranular corrosion test performed in accordance wi
20、th ASTM A 262, Practice E.TABLE 2A - Tensile Properties, Inch/Pound UnitsTensileStrengthksiMinimum Yield Strengthat 0.2% OffsetksiMinimum Elongation in2 Inches, %Strip Specimen(4.3.1)Minimum Elongation in2 Inches. %Full SectIon75 to 105 35.0 35 40TABLE 2B - Tensile Properties, SI UnitsTensileStrengt
21、hMPaMinimum Yield Strengthat 0.2% OffsetMPaMinimum Elongation in50.8 mm, %Strip Specimen(4.3.1)Minimum Elongation in50.8 mm. %Full Section517 to 724 241 35 40Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from I
22、HS-,-,-AMS 5558G SAE AMS 5558G- 4 -3.4.5 Weld Strength: Shall be as follows, determined in accordance with 3.4.5.1 or 3.4.5.2.3.4.5.1 Hydrostatic Pressure Test: A specimen as in 4.3.4 shall withstand, without rupture, an internal hydrostatic pressure which will produce a hoop tensile stress of 75.0
23、ksi (517 MPa) in the tubing wall for not less than 60 seconds. Hydrostatic pressure (P) shall be calculated using Equation 1 and shall be applied gradually in 30 to 60 seconds at a temperature not lower than 60 F (16 C).(Eq. 1)where,P = Test pressure in ksi (MPa)S = 75.0 ksi (517 MPa) tensile stress
24、D = Nominal OD in inches (mm) (nominal OD plus tolerance)d = Nominal ID in inches (mm) (nominal OD minus twice the minimum wall thickness)3.4.5.2 Tensile Strength: Shall be not lower than 75 ksi (517 MPa), determined on specimens as in 4.3.5.3.5 Quality: 3.5.1 Tubing, as received by purchaser, shall
25、 be uniform in contour, quality, and condition and shall have a finish conforming to the best practice for high quality aircraft tubing. It shall be sound and free from grease, oil, and other foreign matter. It shall be free from burrs, cracks, tears, grooves, seams, laminations, dents, crimps, and
26、other imperfections detrimental to usage of the tubing.3.5.2 The weld in each length of tubing, prior to cold working, shall be subjected to radiographic inspection in accordance with ASTM E 1742. Imperfections in or adjacent to the weld, porosity, pinholes, entrapped slag, cracks, mismatches, lack
27、of fusion, undercutting, or other imperfections which cause sharp notches or a reduction of thickness greater than 10% of parent metal wall thickness are not acceptable.3.5.2.1 Metal thinning in, or adjacent to, the weld shall be permissible if not greater than 10% of parent metal wall thickness, pr
28、ovided also that it presents only gradual transitions.3.5.2.2 Individual lengths of tubing which contain no weld imperfections other than metal thinning in excess of 10% of parent metal wall thickness may be reinspected radiographically after cold working. If cold working has reduced the metal thinn
29、ing to less than 10%, the thinning indicated by the first radiograph will not be cause for rejection.3.5.2.3 Each length of tubing in a shipment shall be accompanied by its radiographs.3.5.3 As an alternate to use of radiographic inspection, tubing shall be subjected to ultrasonic inspection in acco
30、rdance with AMS 2634, Class Level A1, except that the length of the notch in the reflector specified in Table 1A is to be 0.250 inches.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5558G SAE AM
31、S 5558G- 5 -3.5.4 Mechanical imperfections, such as light handling marks and light tool marks, are acceptable provided they have not dented the wall of the tube and are gradual in contour to a maximum depth of 10% of parent metal wall thickness.3.5.5 The weld reinforcement shall not extend in height
32、 beyond the contour of the adjacent metal more than 0.0025 inch (0.064 mm) on either outside or inside of the tubing, and the sum of both outside and inside weld reinforcement heights shall not exceed 0.004 inch (0.10 mm).3.6 Tolerances: Unless otherwise specified, the following tolerances shall app
33、ly:3.6.1 Diameter: Shall be as shown in Table 3.3.6.1.1 Outside diameter shall be measured using a periphery or Pi tape.3.6.2 Wall Thickness: Shall be as shown in Table 4.TABLE 3A - Diameter Tolerances, Inch/Pound UnitsNominal ODInchesTolerance, InchMinus Only1.000 to 2.500, incl 0.005Over 2.500 to
34、3.500, incl 0.007Over 3.500 to 4.500, incl 0.009Over 4.500 to 7.000, incl 0.012TABLE 3B - Diameter Tolerances, SI UnitsNominal ODMillimetersTolerance, MillimeterMinus Only25.40 to 63.50, incl 0.13Over 63.50 to 88.90, incl 0.18Over 88.90 to 114.30, incl 0.23Over 114.30 to 177.80, incl 0.30TABLE 4A -
35、Wall Thickness Tolerances, Inch/Pound UnitsNominal Wall ThicknessInchesTolerance, InchPlus and Minus0.010 to 0.016, incl 0.002Over 0.016 to 0.026, incl 0.003Over 0.026 to 0.040, incl 0.004Over 0.040 to 0.058, incl 0.005Over 0.058 to 0.072, incl 0.006Copyright SAE International Provided by IHS under
36、license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5558G SAE AMS 5558G- 6 -3.6.3 Ovality: For tubing having nominal wall thickness of 0.040 inch (1.02 mm) and under, ovality shall not exceed 6% of the nominal OD. For tubing having nominal wall thic
37、kness over 0.040 inch (1.02 mm), the tolerances shown in Table 5 shall apply.3.6.3.1 Ovality is obtained by dividing the difference between the maximum and minimum OD of any one station along the tube by the nominal OD and multiplying by 100.3.6.4 Length: Cut-to-length tubing shall not vary from the
38、 length ordered by more than +1/8 inch (+3.2 mm), -0.3.6.5 Straightness: When measured using a 3-foot (914-mm) straight-edge touching the tube at two points, the perpendicular distance from the straight-edge to the tube at any point between the two points of contact, shall not exceed 0.030 x L/3 inc
39、h, where “L” is the distance in feet between points of contact or shall not exceed 0.83 x L mm, where “L” is the distance in meters between points of contact.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The vendor of tubing shall supply all samples for vendors tests and shall
40、be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the tubing conforms to specified requirements.TABLE 4B - Wall Thickness Tolerances, SI UnitsNominal Wall ThicknessMillimetersTolera
41、nce, MillimeterPlus and Minus0.25 to 0.41, incl 0.05Over 0.41 to 0.66, incl 0.08Over 0.66 to 1.02, incl 0.10Over 1.02 to 1.47, incl 0.13Over 1.47 to 1.83, incl 0.15TABLE 5 - Maximum OvalityNominal ODInchesNominal ODMillimetersTolerance% of OD1.000 to 1.250, incl 25.40 to 31.75, incl 5.0Over 1.250 to
42、 1.500, incl Over 31.75 to 38.10, incl 4.0Over 1.500 to 1.750, incl Over 38.10 to 44.45, incl 3.5Over 1.750 to 2.000, incl Over 44.45 to 50.80, incl 3.0Over 2.000 to 2.500, incl Over 50.80 to 63.50, incl 2.5Over 2.500 to 7.000, incl Over 63.50 to 177.80, incl 2.0Copyright SAE International Provided
43、by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5558G SAE AMS 5558G- 7 -4.2 Classification of Tests: 4.2.1 Acceptance Tests: Composition (3.1), tensile properties (3.4.1), bending (3.4.2), weld crack susceptibility (3.4.3), weld str
44、ength (3.4.5), radiographic (3.5.2) or ultrasonic (3.5.3) inspection, and tolerances (3.6) are acceptance tests and shall be performed on each heat or lot as applicable.4.2.2 Periodic Tests: Susceptibility to intergranular attack (3.4.4) is a periodic test and shall be performed at a frequency selec
45、ted by the vendor unless frequency of testing is specified by purchaser.4.3 Sampling and Testing: Shall be in accordance with AMS 2371 and the following:4.3.1 Strip specimens for tensile testing (3.4.1) shall be taken parallel to the tubing axis, shall have a 2-inch (50.8-mm) gage length, and shall
46、not include the weld reinforcement.4.3.2 Specimens for bending (3.4.2) shall be at least 2 inches (50.8 mm) long when measured parallel to the weld direction. Additionally, the sample shall contain the full width of the weld plus 0.10 inches (2.5 mm) minimum on either side of the weld toe.4.3.3 Spec
47、imens for weld crack susceptibility (3.4.3) shall be cut from a tube in such a manner as to include at least 6 inches (152 mm) of weld bead and 1/4 inch (6.4 mm) of tube wall on each side of the weld. The edges shall be smooth and free from burrs.4.3.4 Specimens for weld strength hydrostatic pressur
48、e test (3.4.5.1) shall be full cross-section of the tubing, the unsupported length of which shall be not less than 2 feet (610 mm) or six times the nominal OD, whichever is greater.4.3.5 Specimens for weld strength tensile test (3.4.5.2) shall be taken perpendicular to the direction of the weld and
49、shall include the weld near the center of the gage length.4.4 Reports: The vendor of the product shall furnish with each shipment a report showing the following results of tests and relevant information:4.4.1 For each heat: Composition.4.4.2 For each lot: Tensile propertiesBending propertyWeld crack susceptibilityWeld strengthRadiographic (or ultrasonic) inspection.Copyright SAE International Pro
