1、_ 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 particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this p
3、ublication 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 (inside USA and Canada) Tel: +1 724-776-497
4、0 (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/AMS5628F AEROSPACE MATERIAL SPECIFICATION AMS5628 REV. F Issued 1948-05 Revised 2
5、002-01 Reaffirmed 2015-05 Superseding AMS5628E Steel, Corrosion-Resistant, Bars, Wire, Forgings, and Tubing 16Cr - 2.5Ni (SAE 51431) (Composition similar to UNS S43100) RATIONALE AMS5628F has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE:1.1 Form: This specification covers
6、 a heat-treatable, corrosion-resistant steel in the form of bars, wire, forgings, mechanical tubing, and stock for forging or heading.1.2 Application: These products have been used typically for parts and fittings requiring corrosion resistance and high strength at room and elevated up to 500 F (260
7、 C) temperature, but usage is not limited to such applications.1.2.1 Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking. ARP1110 recommends practices to minimize such conditions.2. APPLICABLE DOCUMENTS: The issue of the following docu
8、ments 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 canceled and no superseding document
9、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 2241 Tolerances, Corrosion and Heat-Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Bars and WireMAM 2241
10、 Tolerances, Metric, Corrosion and Heat-Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Bars and WireAMS 2243 Tolerances, Corrosion and Heat-Resistant Steel TubingMAM 2243 Tolerances, Metric, Corrosion and Heat-Resistant Steel TubingAMS 2248 Chemical Check Analysis Limits, Corrosion and He
11、at-Resistant Steels and Alloys, Maraging and Other Highly-Alloyed Steels, and Iron AlloysAMS 2303 Steel Cleanliness, Aircraft-Quality, Martensitic Corrosion-Resistant Steels, Magnetic Particle Inspection ProcedureMAM 2303 Steel Cleanliness, Aircraft-Quality, Martensitic Corrosion-Resistant Steels, M
12、agnetic Particle Inspection Procedure, Metric (SI) MeasurementAMS 2371 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steels and Alloys, Wrought Products and Forging StockAMS 2374 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steel and Alloy ForgingsAMS 2
13、806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and AlloysAMS 2808 Identification ForgingsARP1110 Minimizing Stress Corrosion Cracking in Wrought Forms of Steels and Corrosion- Resistant Steels and Alloys2.2 ASTM Publ
14、ications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or www.astm.org.ASTM 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 A
15、lloys3. 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 methods acceptable to the purchaser.SAE INTERNATIONAL AMS5628F Page 2 of
16、13_ 3.1.1 When stock for heading is ordered, nickel content may be as low as 1.50 for bars and wire under 0.66 inch (16.8 mm) in nominal diameter.3.1.2 Check Analysis: Composition variations shall meet the applicable requirements of AMS 2248 except that no variation over maximum is permitted for nit
17、rogen.3.2 Condition: 3.2.1 Temper: Forging and heading stock shall be furnished as ordered. Other product shall be furnished annealed with a maximum hardness of 302 HB or equivalent (See 8.2), determined in accordance with ASTM A 370.3.2.2 Surface: 3.2.2.1 Round bars and heading stock up to 0.50 inc
18、h (12.7 mm), inclusive, in nominal diameter shall be cold drawn or ground. Over 0.50 to 1.50 inches (12.7 to 38 mm), inclusive, in nominal diameter shall be ground or smooth turned, and over 1.50 inches (38 mm) in nominal diameter shall be ground or turned. Round forging stock shall be ground or tur
19、ned.3.2.2.2 Bars other than rounds, 2.75 inches (69.8 mm) and under in nominal distance between parallel sides, and all hexagons, wire, and mechanical tubing shall be cold finished.3.2.2.3 Other bars and forging stock shall be hot finished and descaled.3.2.2.4 Forgings shall be free of scale.3.3 Pro
20、perties: The product shall conform to the following requirements:TABLE 1 - CompositionElement min maxCarbon 0.12 0.17Manganese 0.30 0.80Silicon 0.20 0.60Phosphorus - 0.040Sulfur - 0.030Chromium 15.50 16.50Nickel (See 3.1.1) 2.00 3.00Molybdenum - 0.25Copper - 0.50Nitrogen - 0.10SAE INTERNATIONAL AMS5
21、628F Page 3 of 13_ 3.3.1 Response to Heat Treatment: Longitudinal tensile specimens, taken from the product, or from precursor material (for forgings, See 3.3.1.1), having a minimum nominal diameter of 0.250 inches (6.35 mm), which have been heat treated in accordance with 3.3.1.2 and tested in acco
22、rdance with ASTM A 370 shall meet the requirements shown in Table 2 (See 8.3).3.3.1.1 To test forgings, specimens may be taken from forgings, forging stock, or stock which has been forged to simulate the least reduced section of the forgings.3.3.1.2 Soak at 1875 F 25 (1024 C 14) for not less than 30
23、 minutes, quench in agitated oil at 125 F 25 (52 C 14), cool to room temperature in water, soak in a liquid at -100 F 20 (-73 C 11) for not less than 2 hours, temper in air at 550 F 25 (288 C 14) for 2 hours, and retemper in air at 550 F 25 (288 C 14) for 2 hours.3.3.2 Microstructure: Specimens from
24、 product heated to 1875 F 25 (1024 C 14), held at heat for not less than 30 minutes, quenched in agitated oil at 125 F 25 (52 C 14), cooled to room temperature in water, and tempered in air at 1175 F 25 (635 C 14) for not less than 3 hours shall meet the following requirements. The limits of 3.3.2.1
25、, 3.3.2.2, and 3.3.2.3 apply to all fields in a longitudinal specimen, having a minimum length and width of 0.250 inch (6.35 mm), polished, etched, and examined at 250X.3.3.2.1 Banded Ferrite (See Figures 1, 2, 3, and 4): The product shall not contain banded free ferrite in excess of that shown in F
26、igure 3.3.3.2.2 Blocky Ferrite: The product shall not contain blocky ferrite in excess of 4%.3.3.2.3 Banded Austenite (See Figures 1, 5, 6, and 7): The product shall not contain banded retained austenite in excess of that shown in Figure 5.3.3.2.4 Blocky Austenite: Shall not be cause for rejection.3
27、.3.2.5 Average Grain Size: Shall be ASTM No. 3 or finer, determined by comparison of a heat treated (as in 3.3.2), polished, and etched specimen with the chart in ASTM E 112.TABLE 2 - Minimum Tensile PropertiesProperty ValueTensile Strength 200 ksi (1379 MPa)Yield Strength at 0.2% Offset 150 ksi (10
28、34 MPa)Elongation in 2 Inches or 4D 10%Reduction of Area 40%SAE INTERNATIONAL AMS5628F Page 4 of 13_ 3.4 Quality: The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the product.3.4.1
29、Steel shall be aircraft-quality conforming to AMS 2303 or MAM 2303.3.4.2 Grain flow of die forgings, except in areas which contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow.3.5 Tolerances: Shall be as follows:3.5.1 Bars and Wir
30、e: In accordance with AMS 2241 or MAM 2241.3.5.2 Mechanical Tubing: In accordance with AMS 2243 or MAM 2243.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The vendor of the product shall supply all samples for vendors tests and shall be responsible for the performance of all req
31、uired tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements.4.2 Classification of Tests: 4.2.1 Acceptance Tests: Composition (3.1), condition (3.2), response to heat treatment (3.3.1), micr
32、ostructure (3.3.2), and tolerances (3.5) are acceptance tests and shall be performed on each heat or lot as applicable.4.2.2 Periodic Tests: Frequency-severity cleanliness rating (3.4.1) and grain flow of die forgings (3.4.2) are periodic tests and shall be performed at a frequency selected by the v
33、endor unless frequency of testing is specified by purchaser.4.3 Sampling and Testing: Shall be as follows:4.3.1 Bars, Wire, Mechanical Tubing, and Stock for Forging or Heading: In accordance with AMS 2371.4.3.2 Forgings: In accordance with AMS 2374.SAE INTERNATIONAL AMS5628F Page 5 of 13_ 4.3.3 Micr
34、ostructure: A sample shall be taken to represent each 50 pieces in a lot. The plane examined shall be as shown in Figure 8 for constant section products; for forgings, the plane examined shall be at approximately one-third of the thickness in the thinnest section of the forging.4.4 Reports: The vend
35、or 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 of bars, wire, forgings, and mechanical tubing: HardnessTensile propertiesMicrostructureAverage grain size.4.4.3 A statement
36、 that the product conforms to the other technical requirements.4.4.4 Purchase order numberHeat and lot numbersAMS 5628FSizeQuantity.4.4.5 If forgings are supplied, the size and melt source of stock used to make the forgings.4.5 Resampling and Retesting: Shall be as follows:4.5.1 Bars, Wire, Mechanic
37、al Tubing, and Stock for Forging or Heading: In accordance with AMS 2371.4.5.2 Forgings: In accordance with AMS 2374.5. PREPARATION FOR DELIVERY: 5.1 Sizes: Except when exact lengths or multiples of exact lengths are ordered, bars, straight wire, and tubing will be acceptable in mill lengths of 6 to
38、 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).SAE INTERNATIONAL AMS5628F Page 6 of 13_ 5.2 Identification: Shall be as follows:5.2.1 Bars, Wire, and Mechanical Tubing: In accordance with AMS 2806.5.2.2 Forgings: In accordance wi
39、th AMS 2808.5.2.3 Stock for Forging or Heading: As agreed upon by purchaser and vendor.5.3 Packaging: The product 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
40、 the product to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENT: A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders.7. REJECTIONS: Product not conforming to this specification, or to modifications authorized
41、 by purchaser, will be subject to rejection.8. NOTES: 8.1 A change bar ( l ) 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 this specification. An (R) symbol to the left of the
42、document title indicates a complete revision of the specification, including technical revisions. Change bars and (R) are not used in original publications, nor in specifications that contain editorial changes only.8.2 Hardness conversion tables for metals are presented in ASTM E 140.8.3 The yield s
43、trength value in Table 2 is not supported by AMS statistical analysis of currently available test results. However, the value has been used successfully for many years for procurement in accordance with company specifications and MIL-S-18732.SAE INTERNATIONAL AMS5628F Page 7 of 13_ 8.4 Terms used in
44、 AMS are clarified in ARP1917 and as follows:8.4.1 The term “mechanical tubing” as used in AMS means a heavy-walled cylindrical tubing, intended primarily for the machining of circular rings, flanges, shafts, etc., having a wall thickness which is a substantial proportion of the outer diameter; such
45、 tubing is not normally used for the transmission of fluids, and parts made from it are usually machined all over. This product is sometimes known as “hollow bar”.8.5 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and
46、the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information.8.6 Purchase documents should specify not less than the following:AMS 5628FForm and size or part number of product desiredQuantity of product desired.PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “F”SAE INTERNATIONAL AMS5628F Page 8 of 13_ FIGURE 1 - Desired Microstructure (100% Martensite)FIGURE 2 - Acceptable Microstructure Containing Small Amounts of Banded Free FerriteSAE INTERNATIONAL AMS5628F Page 9 of 13_
