1、 AEROSPACE MATERIAL SPECIFICATION Steel, Corrosion and Heat-Resistant, Welded Tubing 18Cr - 10.5Ni - 0.40Ti (SAE 30321) Solution Heat Treated (Composition similar to UNS S32100) AMS 5576KSuperseding AMS 5576J RATIONALE K Revision To conduct a Five Year Review. 1. SCOPE: 1.1 Form: This specification
2、covers a corrosion and heat-resistant steel in the form of welded tubing. 1.2 Application: This tubing has been used typically for parts requiring both corrosion and heat resistance, especially when subjected to welding, brazing, or other exposure to temperatures over 800 F (427 C) during fabricatio
3、n, and also for parts requiring oxidation resistance up to 1500 F (816 C) but useful at that temperature only when stresses are low. Usage is not limited to such applications. 2. APPLICABLE DOCUMENTS: The issue of the following documents in effect on the date of the purchase order forms a part of th
4、is 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 superseding document has been specified, the last published issue of that document shall
5、 apply. Issued 1952-06 Revised 2005-11Reaffirmed 2010-10 SAE Technical Standards Board Rules 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 particul
6、ar use, including any patent infringement arising therefrom, is the sole responsibility 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 2010 SAE Internati
7、onal All rights reserved. No part of this publication may be reproduced, stored in a retrieval 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
8、(inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS5576K SAE - 2 - AMS 5576K AMS 5576K
9、2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org. AMS 2243 Tolerances, Corrosion and Heat-Resistant Steel Tubing AMS 2248 Chemical Check Analysis Limits, Corrosion and Heat-Resistant Steels and Alloys, Maraging and Other Highly-Alloyed Steels
10、, and Iron Alloys AMS 2371 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steels and Alloys, Wrought Products and Forging Stock AMS 2807 Identification, Carbon and Low-Alloy Steels, Corrosion and Heat-Resistant Steels and Alloys, Sheet, Strip, Plate, and Aircraft Tubing 2.2 AST
11、M Publications: Available from ASTM, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959 or www.astm.org. ASTM A 262 Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels ASTM A 370 Mechanical Testing of Steel Products ASTM E 353 Chemical Analysis of Stai
12、nless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys 3. 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 by other analytical
13、 methods acceptable to purchaser. TABLE 1 - Composition Element min max Carbon Manganese Silicon Phosphorus Sulfur Chromium Nickel Titanium Molybdenum Copper Nitrogen - - 0.25 - - 17.00 9.00 5x(C+N) - - - 0.08 2.00 1.00 0.0400.03019.00 12.00 0.70 0.75 0.75 0.10 3.1.1 Check Analysis: Composition vari
14、ations shall meet the applicable requirements of AMS 2248. SAE - 3 - AMS 5576K AMS 5576K3.2 Condition: Solution heat treated and, unless solution heat treatment is performed in an atmosphere yielding a bright finish, descaled. 3.3 Fabrication: Tubing 2.00 inches (50.8 mm) and under in nominal OD sha
15、ll be cold worked after welding. Finishing operations for removal of surface blemishes shall be performed prior to final solution heat treatment. A light polish to improve surface appearance may be employed after solution heat treatment. 3.4 Properties: Tubing shall conform to the following requirem
16、ents; 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. TABLE 2A - Tensile Properties, Inch/Pound Units Nominal OD Inch Nominal Wall Thickness Inch Tensile Strength ksi, max Elongation in 2 inches %, min Strip Elongatio
17、n in 2 inches %, min Full Tube Up to 0.188, incl Over 0.188 to 0.500, incl Over 0.500 Up to 0.016, incl Over 0.016 Up to 0.010, incl Over 0.010 Up to 0.010, incl Over 0.010 120 105 115 105 120 105 - - 30 30 25 30 33 35 35 35 30 35 TABLE 2B - Tensile Properties, SI Units Nominal OD Millimeters Nomina
18、l Wall ThicknessMillimeter Tensile Strength MPa, max Elongation in 50.8 mm %, min Strip Elongation in 50.8 mm %, min Full Tube Up to 4.78, incl Over 4.78 to 12.70, incl Over 12.70 Up to 0.41, incl Over 0.41 Up to 0.25, incl Over 0.25 Up to 0.25, incl Over 0.25 827 724 793 724 827 724 - - 30 30 25 30
19、 33 35 35 35 30 35 SAE - 4 - AMS 5576K AMS 5576K3.4.2 Flarability: Specimens as in 4.3.1 shall withstand flaring at room temperature, without formation of cracks or other visible defects, by being forced axially with steady pressure over a hardened and polished tapered steel pin having a 74 degree i
20、ncluded angle to produce a flare having a permanent expanded OD not less than specified in Table 3. TABLE 3A - Flarability, Inch/Pound Units Nominal OD Inch Expanded OD Inch Nominal OD Inches Expanded OD Inches 0.125 0.188 0.250 0.312 0.375 0.500 0.625 0.200 0.302 0.359 0.421 0.484 0.656 0.781 0.750
21、 1.000 1.250 1.500 1.750 2.000 0.937 1.187 1.500 1.721 2.106 2.356 TABLE 3B - Flarability, SI Units Nominal OD Millimeters Expanded OD Millimeters Nominal OD Millimeters Expanded OD Millimeters 3.18 4.78 6.35 7.92 9.52 12.70 15.88 5.08 7.67 9.12 10.69 12.29 16.66 19.84 19.05 25.40 31.75 38.10 44.45
22、50.80 23.80 30.15 38.10 43.71 53.49 59.84 3.4.2.1 Tubing with nominal OD between any two standard sizes given in Table 3 shall take the same percentage flare as that for the larger of the two sizes. 3.4.3 Susceptibility to Intergranular Attack: Specimens from tubing, after sensitizing treatment and
23、immersion as required by ASTM A 262 Practice E, shall not exhibit intergranular attack or cracks when tested in accordance with the following: 3.4.3.1 Examination of OD Surface: Shall be performed after flattening a 1-inch (25 mm) long specimen to a total thickness under load of three times the wall
24、 thickness. 3.4.3.2 Examination of ID Surface: Shall be performed after splitting a 1-inch (25-mm) long specimen and folding the split specimen, with ID surfaces on the outside of fold, around a mandrel having a diameter equal to the nominal wall thickness of the tube. 3.4.3.2.1 Tubing Over 0.625 In
25、ch (15.88 mm) in OD: The axis of the fold shall be parallel to the axis of the tube. 3.4.3.2.2 Tubing 0.625 Inch (15.88 mm) and Under in OD: The axis of the fold shall be either parallel or transverse to the axis of the tube. SAE - 5 - AMS 5576K AMS 5576K3.4.3.3 If a weld is visible, flattening and/
26、or folding parallel to the tube axis shall be oriented so as to apply maximum tension to the weld. 3.5 Quality: Tubing, as received by purchaser, shall be uniform in quality and condition and shall have a finish conforming to the best practice for high quality aircraft tubing. It shall be smooth and
27、 free from heavy scale or oxide, burrs, seams, tears, grooves, laminations, slivers, pits, and other imperfections detrimental to usage of the tubing. Surface imperfections, such as handling marks, straightening marks, light mandrel and die marks, shallow pits, and scale pattern will not be consider
28、ed injurious if the imperfections are removable within the tolerances specified for wall thickness, but removal of such imperfections is not required. 3.6 If beads are present at the welds on the inner surfaces of tubing over 2.00 inches (50.8 mm) in nominal OD, such beads shall be not thicker than
29、0.010 inch (0.25 mm). The outer surfaces of all tubing and the inner surfaces of tubing 2.00 inches (50.8 mm) and under in nominal OD shall be free from beads. 3.7 Tolerances: Shall conform to all applicable requirements of AMS 2243. 4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection
30、: The vendor of tubing shall supply all samples for vendors tests and shall 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. 4.2 Clas
31、sification of Tests: 4.2.1 Acceptance Tests: Composition (3.1), tensile properties (3.4.1), and tolerances (3.7) are acceptance tests and shall be performed on each heat or lot as applicable. 4.2.2 Periodic Tests: Flarability (3.4.2) and susceptibility to intergranular attack (3.4.3) are periodic te
32、sts and shall be performed at a frequency selected 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 Specimens for flarability test (3.4.2) shall be full tubes or sections cut from a tube. The
33、end of the specimen to be flared shall be cut square, with the cut end smooth and free from burrs, but not rounded. SAE - 6 - AMS 5576K AMS 5576K4.4 Reports: The vendor of tubing shall furnish with each shipment a report showing the results of tests for composition of each heat and for tensile prope
34、rties of each lot, and stating that the tubing conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS 5576K, size, and quantity. 4.5 Resampling and Retesting: Shall be in accordance with AMS 2371. 5. PREPARATION FOR DELIVERY: 5.1
35、Sizes: Except when exact lengths or multiples of exact lengths are ordered, straight tubes will be acceptable in mill lengths of 6 to 20 feet (1.8 to 6.1 m) but not more than 10% of any shipment shall be supplied in lengths shorter than 10 feet (3 m). 5.2 Identification: Shall be in accordance with
36、AMS 2807. 5.3 Packaging: Tubing shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the tubing to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT: A v
37、endor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS: Tubing not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES: 8.1 A change bar (l) locate
38、d in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this specification. An (R) symbol to the left of the document title indicates a complete revision of the specification, including techni
39、cal revisions. Change bars and (R) are not used in original publications, nor in specifications that contain editorial changes only. SAE - 7 - AMS 5576K AMS 5576K8.2 Terms used in AMS are clarified in ARP1917. 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are prim
40、ary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.4 Purchase documents should specify not less than the following: AMS 5576K Size of tubing desired Quantity of tubing desired
41、. 8.5 Similar Specifications: MIL-T-6737 is listed for information only and shall not be construed as an acceptable alternate unless all requirements of this AMS are met. 8.6 Key Words: Steel, corrosion-resistant, tubing, welded, solution heat treated, UNS S32100 PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “F”
