1、Steel, Corrosion and Heat-Resistant, Seamless or Welded Hydraulic Tubing18Cr - 11Ni - 0.70Cb (SAE 30347)Solution 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 seamless or welded and drawn tubing.1.2 App
2、lication: This tubing has been used typically for parts requiring both corrosion and heat resistance, especially when such parts are welded during fabrication, but usage is not limited to such applications. The alloy provides oxidation resistance up to 1500 F (816 C) but is useful at that temperatur
3、e only when stresses are low.1.3 Classification: Tubing covered by this specification is classified as follows:Type 1 SeamlessType 2 Welded and drawn1.3.1 Unless a specific type is ordered, either type may be supplied.2. APPLICABLE DOCUMENTS: The issue of the following documents in effect on the dat
4、e 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 superseding document has been specified, the l
5、ast published issue of that document shall apply.AEROSPACE MATERIAL SPECIFICATIONAMS 5556HIssued AUG 1955Revised MAY 2003Superseding AMS 5556GSAE 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
6、 report is entirely voluntary, and its applicability and suitability for any particular 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 cance
7、lled. 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 retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, witho
8、ut 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: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org Reaffirmed MAY 2008Copyright SAE International Provided by IHS under license
9、 with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5556H SAE AMS 5556H- 2 -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 TubingAMS 2248 Ch
10、emical Check Analysis Limits, Corrosion and Heat-Resistant Steels and Alloys, Maraging and Other Highly-Alloyed Steels, and Iron AlloysAMS 2371 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steels and Alloys, Wrought Products and Forging StockAMS 2634 Ultrasonic Inspection, Th
11、in Wall Metal TubingAMS 2807 Identification, Carbon and Low-Alloy Steels, Corrosion and Heat-Resistant Steels and Alloys, Sheet, Strip, Plate, and Aircraft Tubing2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or www.astm.org.ASTM A 262 Detecting S
12、usceptibility to Intergranular Attack in Stainless SteelsASTM A 370 Mechanical Testing of Steel ProductsASTM E 112 Determining Average Grain SizeASTM E 353 Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron AlloysASTM E 426 Electromagnetic (Eddy Current)
13、 Examination of Seamless and Welded Tubular Products, Austenitic Stainless Steel and Similar AlloysASTM E 1417 Liquid Penetrant 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 AS
14、TM E 353, by spectrochemical methods, or by other analytical methods acceptable to purchaser.TABLE 1 - CompositionElement min maxCarbon - 0.08Manganese - 2.00Silicon 0.50 1.00Phosphorus - 0.040Sulfur - 0.030Chromium 17.00 19.00Nickel 9.00 13.00Columbium 10xC 1.10Molybdenum - 0.75Copper - 0.75Copyrig
15、ht SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5556H SAE AMS 5556H- 3 -3.1.1 Check Analysis: Composition variations shall meet the applicable requirements of AMS 2248.3.2 Condition: Solution heat treat
16、ed and, unless solution heat treatment is performed in an atmosphere yielding a bright finish, pickled as required or passivated.3.3 Fabrication: Tubing shall be produced by either a seamless or a welded and drawn process. Any finishing operation applied to remove objectionable pits and surface blem
17、ishes shall be performed prior to final solution heat treatment. A light polish to improve external surface appearance may be employed after solution heat treatment, and, if performed, the product shall be subsequently passivated.3.3.1 Welded (Type 2) tubing shall be cold reduced after welding to re
18、move any dimensional indication of the presence of the weld.3.4 Properties: Tubing shall conform to the following 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.TABLE 2A - Tensile Properties, Inch/Pound U
19、nitsNominal ODInchesNominalWall ThicknessInchesTensileStrengthksiYield Strengthat 0.2% Offsetksi, minElongation in2 inches%, minStripElongation in2 inches%, minFull TubeUp to 0.188, incl Up to 0.016, incl 75 to 120 30.0 - 33Over 0.016 75 to 105 30.0 - 35Over 0.188 to 0.500, incl Up to 0.010, incl 75
20、 to 115 30.0 30 35Over 0.010 incl 75 to 105 30.0 30 35Over 0.500 Over 0.010 75 to 105 30.0 30 35Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5556H SAE AMS 5556H- 4 -3.4.2 Flarability: Specimen
21、s 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 included angle to produce a flare having the permanent expanded OD not less
22、than that specified in Table 3.3.4.2.1 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.TABLE 2B - Tensile Properties, SI UnitsNominal ODMillimetersNominalWall ThicknessMillimetersTensileStrengthMPaYie
23、ld Strengthat 0.2% OffsetMPa, minElongation in50.8 mm%, minStripElongation in50.8 mm%, minFull TubeUp to 4.78, incl Up to 0.41, incl 517 to 827 207 - 33Over 0.41 517 to 724 207 - 35Over 4.78 to 12.70, incl Up to 0.25, incl 517 to 793 207 30 35Over 0.25 incl 517 to 724 207 30 35Over 12.70 Over 0.25 5
24、17 to 724 207 30 35TABLE 3A - Flarability, Inch/Pound UnitsNominal ODInchesExpanded ODInchesNominal ODInchesExpanded ODInches0.125 0.200 0.750 0.9370.188 0.302 1.000 1.1870.250 0.359 1.250 1.5000.312 0.421 1.500 1.7210.375 0.484 1.750 2.1060.500 0.656 2.000 2.3560.625 0.781TABLE 3B - Flarability, SI
25、 UnitsNominal ODMillimetersExpanded ODMillimetersNominal ODMillimetersExpanded ODMillimeters3.18 5.08 19.05 23.804.78 7.67 25.40 30.156.35 9.12 31.75 38.107.92 10.69 38.10 43.719.53 12.29 44.45 53.4912.70 16.66 50.80 59.8415.88 19.84Copyright SAE International Provided by IHS under license with SAEN
26、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5556H SAE AMS 5556H- 5 -3.4.3 Pressure Test: Tubing shall show no bulges, leaks, pinholes, cracks, or other defects when subjected to an internal hydrostatic pressure (P), except that a diametric permanent set of 0
27、.002 inch/inch (0.002 mm/mm) of diameter is acceptable. The hydrostatic pressure (P) shall be determined from Equation 1:(Eq. 1)where: P = Test pressure in ksi (MPa)S = 30.0 ksi (207 MPa)D = Nominal OD in inches (mm) (nominal OD plus tolerance)d = Nominal ID in inches (mm) (nominal OD minus twice th
28、e minimum wall thickness)3.4.4 Susceptibility to Intergranular Attack: Specimens from tubing, after sensitizing treatment, shall pass the intergranular corrosion test performed in accordance with ASTM A 262, Practice E. After immersion, tubing shall not exhibit intergranular attack or cracks when te
29、sted in accordance with the following:3.4.4.1 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 thickness.3.4.4.2 Examination of ID Surface: Shall be performed after splitting a 1-inch (25-mm) long sp
30、ecimen and folding the split specimen, with ID surface on the outside of fold, around a mandrel having a diameter equal to the wall thickness of the tube.3.4.4.2.1 Tubing Over 0.625 Inch (15.88 mm) in OD: The axis of the fold shall be parallel to the axis of the tube.3.4.4.2.2 Tubing 0.625 Inch (15.
31、88 mm) and Under in OD: The axis of the fold shall be either parallel or transverse to the axis of the tube.3.4.4.3 If a weld is visible, flattening and/or folding parallel to the tube axis shall be oriented so as to apply maximum tension to the weld.3.4.5 Microstructure: Tubing shall reveal no cont
32、inuous intergranular carbide precipitation when electrolytically etched and examined microscopically at 500X magnification. The presence of some discontinuous intragranular carbide precipitation shall not be considered detrimental if the other technical requirements are met.3.4.6 Average Grain Size:
33、 Shall be ASTM No. 5 or finer, determined by examination of a specimen, polished and electrolytically etched in 10% oxalic acid solution, in accordance with ASTM E 112.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without lice
34、nse from IHS-,-,-AMS 5556H SAE AMS 5556H- 6 -3.5 Quality: 3.5.1 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 free from heavy scale or oxide, burrs, seams, t
35、ears, 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, and scale pattern, will not be considered injurious if the imperfections are removable within the to
36、lerances specified for wall thickness but removal of such imperfections is not required.3.5.2 Tubing shall be free from grease or other foreign matter. Metallic flakes or particles shall not be collected on a clean white cloth drawn through the bore of a sample tube. Discoloration of the cloth, with
37、out the presence of flakes or particles, is acceptable.3.5.3 When specified by purchaser, tubing shall be subjected to fluorescent penetrant inspection in accordance with ASTM E 1417, to ultrasonic inspection in accordance with AMS 2634, to electromagnetic (eddy-current) testing in accordance with A
38、STM E 426, or to any combination thereof. Tubing shall meet the requirements of 3.5 and other acceptance criteria established by the cognizant engineering organization.3.6 Tolerances: Shall conform to all applicable requirements of AMS 2243.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Ins
39、pection: 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.
40、2 Classification of Tests: 4.2.1 Acceptance Tests: Composition (3.1), tensile properties (3.4.1), flarability (3.4.2), microstructure (3.4.5), average grain size (3.4.6), cleanliness of tubing (3.5.2), nondestructive inspection when specified (3.5.3), and tolerances (3.6) are acceptance tests and sh
41、all be performed on each heat or lot as applicable.4.2.2 Periodic Tests: Pressure test (3.4.3) and susceptibility to intergranular attack (3.4.4) are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser.Copyright SAE Intern
42、ational Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5556H SAE AMS 5556H- 7 -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 tub
43、es or sections cut from a tube. The end of the specimen to be flared shall be cut square, with the cut end smooth and free from burrs, but not rounded. One or more specimens from each lot shall be tested.4.4 Reports: The vendor of the product shall furnish with each shipment a report showing the fol
44、lowing results of tests and relevant information:4.4.1 For each heat: Composition.4.4.2 For each lot: Tensile propertiesFlarabilityMicrostructureAverage grain sizeNondestructive inspection, when specified.4.4.3 A statement that the product conforms to the other technical requirements.4.4.4 Purchase
45、order numberHeat and lot numbersAMS 5556HSizeQuantity.4.5 Resampling and Retesting: Shall be in accordance with AMS 2371.5. PREPARATION FOR DELIVERY: 5.1 Sizes: Except when exact lengths or multiples of exact lengths are ordered, straight tubing will be acceptable in mill lengths of 6 to 20 feet (1.
46、8 to 6.1 m) but not more than 10% of any shipment shall be supplied in lengths shorter than 10 feet (3 m).Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 5556H SAE AMS 5556H- 8 -5.2 Identificatio
47、n: Shall be in accordance with 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 de
48、livery.6. ACKNOWLEDGMENT: A vendor 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:
49、8.1 A change bar (|) located 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 a specification. An (R) symbol to the left of the document title indicates a complete revision of the specification, including technical revision. Change bars and (R) are not
