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 isentirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, 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 2016 SAE InternationalAll rights reserved. No part of this public
3、ation 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: +1 724-776-4970 (outs
4、ide USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS5935AEROSPACEMATERIAL SPECIFICATIONAMS5935Issued 2010-07Reaffirmed 2016-09Steel, Corrosion-
5、Resistant, Bars, Wire, and Forgings12Cr -10Ni -2Mo -0.9Al -0.3TiVacuum Induction Plus Vacuum Consumable Electrode MeltedSolution Heat Treated, Precipitation Hardenable(Composition similar to UNS S10120)RATIONALEAMS5935 has been reaffirmed to comply with the SAE five-year review policy.1. SCOPE 1.1 F
6、orm This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, and forging stock. 1.2 Application These products have been used typically for heat-treated parts requiring a combination of high strength and high toughness up to 800 F (427 C) with good ductility and str
7、ength in the transverse direction, but usage is not limited to such applications. 1.2.1 Certain design, processing procedures, or environmental conditions may cause these products to become susceptible to stress-corrosion cracking; ARP1110 recommends practices to minimize such conditions. 2. APPLICA
8、BLE DOCUMENTS The issue of the 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 h
9、as been cancelled and no superseding document has been specified, the last published issue of that document shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA),
10、www.sae.org. AMS2241 Tolerances, Corrosion and Heat-Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Bars and Wire AMS2248 Chemical Check Analysis Limits, Corrosion and Heat-Resistant Steels and Alloys, Maraging and Other Highly-Alloyed Steels, and Iron Alloys AMS2300 Steel Cleanliness, Pre
11、mium Aircraft-Quality, Magnetic Particle Inspection Procedure AMS2371 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steels and Alloys, Wrought Products and Forging Stock AMS2374 Quality Assurance Sampling and Testing, Corrosion and Heat-Resistant Steel and Alloy Forgings AMS27
12、50 Pyrometry AMS2806 Identification, Bars, Wire, Mechanical Tubing, and Extrusions, Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and Alloys AMS2808 Identification, Forgings AS1182 Standard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechan
13、ical Tubing 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM A 370 Mechanical Testing of Steel Products ASTM A 604 Macroetch Testing of Consumable Electrode Remelted Steel Bars and B
14、illets ASTM E 353 Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys ASTM E 399 Linear-Elastic Plane-Strain Fracture Toughness (KIC) of Metallic Materials 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown i
15、n Table 1, determined by wet chemical methods in accordance with ASTM E 353, by spectrochemical methods, or by other analytical methods acceptable to purchaser. TABLE 1 - COMPOSITION Element min max Carbon - 0.02Manganese - 0.25Silicon - 0.25Phosphorus - 0.015Sulfur - 0.010Chromium 11.00 12.50Nickel
16、 9.00 10.50Molybdenum 1.75 2.25Titanium 0.2 0.5 Aluminum 0.80 1.10Nitrogen - 0.013.1.1 Check Analysis Composition variations shall meet the applicable requirements of AMS2248. 3.2 Melting Practice Product shall be multiple melted using vacuum induction melting followed by vacuum consumable electrode
17、 remelt practice. SAE INTERNATIONAL AMS5935 Page 2 of 8_ 3.3 Condition The product shall be supplied in the following condition: 3.3.1 Bars, Wire, and Forgings 3.3.1.1 Rounds Hot finished, solution heat treated and turned, centerless ground, or polished. 3.3.1.2 Hexagons Hot finished, solution heat
18、treated and descaled. 3.3.1.3 Squares and Flats Hot finished, solution heat treated, and machined or descaled. 3.3.1.4 Wire Cold finished, solution treated and descaled. 3.3.1.5 Forgings Solution heat treated and descaled. 3.3.2 Forging Stock As ordered by the forging manufacturer. 3.4 Heat Treatmen
19、t Bars, wire, and forgings shall be solution heat treated by heating to 1545 F 25 (840 C 14), holding at heat for a time commensurate with section thickness, heating equipment and procedure used, but not less than 30 minutes, and cooling as required to below 90 F (32 C). Pyrometry shall be in accord
20、ance with AMS2750. 3.5 Properties The product shall conform to the following requirements; tensile and hardness testing shall be performed in accordance with ASTM A 370. 3.5.1 Bars, Billets and Forging Stock 3.5.1.1 Macrostructure Visual examination of transverse full cross-sections from bars, bille
21、ts, and forging stock, etched in hot hydrochloric acid in accordance with ASTM A 604, shall show no pipe or cracks. Porosity, segregation, inclusions, and other imperfections for product 36 squares inches (232 cm2) and under in nominal cross-sectional area shall be no worse than the macrographs of A
22、STM A 604 shown in Table 2. TABLE 2 - MACROSTRUCTURE LIMITS Class Condition Severity 1 Freckles A 2 White Spots A 3 Radial Segregation A 4 Ring Pattern B SAE INTERNATIONAL AMS5935 Page 3 of 8_ 3.5.2 Bars, Wire, and Forgings 3.5.2.1 As Solution Heat Treated 3.5.2.1.1 Tensile Strength Wire shall have
23、tensile strength not higher than 160 ksi (1103 MPa). 3.5.2.1.2 Hardness 3.5.2.1.2.1 Bars Not higher than 331 HB, or equivalent (See 8.2), determined at mid-radius or quarter thickness. 3.5.2.1.2.2 Forgings Not higher than 331 HB, or equivalent (See 8.2). 3.5.2.2 After Precipitation Heat Treatment Th
24、e solution heat treated product, 12 inches (305 mm) and under in nominal diameter or maximum cross-sectional dimension, precipitation heat treated to the temperature and time shown in Table 3 and cooled in air, oil, or other suitable liquid quench (See 8.3), shall have the properties specified in 3.
25、5.2.2.1, 3.5.2.2.2, and 3.5.2.2.3. TABLE 3 - PRECIPITATION HEAT TREATING PARAMETERS Condition Temperature Time H1000 1000 F 10 (538 C 6) 4 hours 0.3 3.5.2.2.1 Tensile Properties Shall be as shown in Table 4. TABLE 4A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Condition Specimen Orientation Tensi
26、le Strengthksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches or 4D % Reductionof Area % H1000 Longitudinal Transverse 203 203 189 189 10 9 50 45 TABLE 4B - MINIMUM TENSILE PROPERTIES, SI UNITS Condition Specimen Orientation Tensile StrengthMPa Yield Strength at 0.2% Offset MPa Elongation
27、in 50.8 mm or 4D % Reductionof Area % H1000 Longitudinal Transverse 1400 1400 1300 1300 10 9 50 45 3.5.2.2.1.1 Longitudinal tensile property requirements apply to specimens taken in the longitudinal direction from bars and wire and to specimens taken from forgings with axis of specimen in the area o
28、f gage length varying not more than 15 degrees from parallel to the forging flow lines. 3.5.2.2.1.2 Transverse tensile property requirements apply to specimens taken approximately perpendicular to the longitudinal direction of bars and to specimens taken from forgings with axis of specimens in the a
29、rea of gage length varying not more than 15 degrees from perpendicular to the forging flow lines. SAE INTERNATIONAL AMS5935 Page 4 of 8_ 3.5.2.2.1.3 Transverse tensile property requirements apply only to products from which a test specimen not less than 2-1/2 inches (63.5 mm) long or 0.5 0.5 inch (1
30、2.7 12.7 mm) cross-section can be taken. 3.5.2.2.1.4 Products tested in the transverse direction need not be tested in the longitudinal direction. 3.5.2.2.2 Hardness Shall not be lower than shown in Table 5, or equivalent (See 8.2). Product shall not be rejected on the basis of hardness if the tensi
31、le property requirements of Table 4 are acceptable, determined on specimens taken from the same sample as that with nonconforming hardness or from another sample with similar nonconforming hardness. TABLE 5 - MINIMUM HARDNESS Condition Hardness, HB HRC H1000 401 43.1 3.5.2.2.3 Fracture Toughness Sha
32、ll not be lower than shown in Table 6, determined in accordance with ASTM E 399 on specimens in the longitudinal LT or LR orientation from product 3.00 inches (76.2 mm) and over in nominal section thickness. If product size precludes use of specimens which will provide valid KICresults, use of KQval
33、ues for acceptance is permissible. TABLE 6 - MINIMUM FRACTURE TOUGHNESS, KICCondition Fracture Toughnessksi inch Fracture Toughness MPa m H1000 91 100 3.5.3 Forging Stock When a sample of stock is forged to a test coupon and heat treated as in 3.4 and 3.5.2.2, specimens taken from the heat treated c
34、oupon shall conform to the requirements of 3.5.2.2.1, 3.5.2.2.2, and 3.5.2.2.3. If specimens taken from the stock after heat treatment as in 3.4 and 3.5.2.2 conform to the requirements of 3.5.2.2.1, 3.5.2.2.2, and 3.5.2.2.3, the tests shall be accepted as equivalent to tests of a forged coupon. 3.6
35、Quality 3.6.1 Steel shall be premium aircraft quality conforming to AMS2300. 3.6.2 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. 3.6.3 Bars and wire ordered hot roll
36、ed or cold drawn, or ground, turned, or polished shall, after removal of the standard machining allowance in accordance with AS1182, be free from seams, laps, tears, and cracks open to the ground, turned, or polished surface. 3.6.4 Grain flow of die forgings, except in areas which contain flash-line
37、 end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow. 3.7 Tolerances Bars and wire shall conform to all applicable requirements of AMS2241. SAE INTERNATIONAL AMS5935 Page 5 of 8_ 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The
38、 vendor of the product 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 product conforms to specified requirements. 4.2 Cla
39、ssification of Tests 4.2.1 Acceptance Tests The following requirements are acceptance tests and shall be performed on each heat or lot as applicable. 4.2.1.1 Composition (3.1) and macrostructure rating (3.5.1.1) of each heat. 4.2.1.2 Tensile properties (3.5.2.1.1) of wire as solution heat treated. 4
40、.2.1.3 Hardness (3.5.2.1.2) of bars and forgings, as solution heat treated. 4.2.1.4 Tensile properties (3.5.2.2.1) and hardness (3.5.2.2.2) of bars, wire, and forgings after precipitation heat treatment at 1000 F (538 C). 4.2.1.5 Tolerances (3.7) of bars and wire. 4.2.2 Periodic Tests The following
41、requirements are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser. 4.2.2.1 Fracture toughness (3.5.2.2.3) of bars and forgings after heat treatment. 4.2.2.2 Ability of forging stock (3.5.3) to develop required propertie
42、s. 4.2.2.3 Frequency-severity cleanliness rating (3.6.1). 4.2.2.4 Grain flow of die forgings (3.6.4). 4.3 Sampling and Testing Shall be as follows: 4.3.1 Bars, Wire, and Forging Stock In accordance with AMS2371. 4.3.2 Forgings In accordance with AMS2374. 4.4 Reports The vendor of the product shall f
43、urnish with each shipment a report showing the following results of tests and relevant information: SAE INTERNATIONAL AMS5935 Page 6 of 8_ 4.4.1 For each heat Composition (3.1) and macrostructure (3.5.1.1). 4.4.2 For each lot of wire, bars, and forgings If wire, tensile strength as solution heat tre
44、ated (3.5.2.1.1) If bar or forgings, hardness solution heat treated (3.5.2.1.2) Tensile properties (3.5.2.2.1) and hardness (3.5.2.2.2) after precipitation heat treatment to the H1000 hardened condition. 4.4.3 A statement that the product conforms to the other technical requirements. 4.4.4 Purchase
45、Order Number Heat and lot numbers AMS5935 Size Quantity. 4.4.5 If forgings are supplied, the size and melt source of stock used to make the forgings. 4.4.6 The vendor of stock for forgings shall furnish with each shipment a report showing the results of test for the composition of each heat. This re
46、port shall include the purchase order number, heat and lot number, AMS5935, size and quantity. 4.5 Resampling and Retesting Shall be as follows: 4.5.1 Bars, Wire, and Forging Stock In accordance with AMS2371. 4.5.2 Forgings In accordance with AMS2374. 5. PREPARATION FOR DELIVERY 5.1 Sizes Except whe
47、n exact lengths or multiples of exact lengths are ordered, straight bars and wire 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 as follows: 5.2.1 Bars and Wire In accordance with AMS2806. 5.2.2 Forgings In accordance with AMS2808. SAE INTERNATIONAL AMS5935 Page 7 of 8_ 5.2.3 Forging Stock A
