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 theref
2、rom, 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 2013 SAE InternationalAll rights reserved. No part of this publi
3、cation 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 (out
4、side 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/AMS6544DAEROSPACE MATERIAL SPECIFICATIONAMS6544 REV. DIssued 1975-09Revised 2013-12Supersedin
5、g AMS6544CMaraging Steel, Plate2.0Cr - 10Ni - 8.0Co - 1.0Mo (0.10 - 0.14C)Double Vacuum Melted, Solution Heat Treated(Composition similar to UNS K91971)RATIONALEAMS6544D results from a Five Year Review and update of this specification.1. SCOPE1.1 FormThis specification covers a maraging steel in the
6、 form of rolled or forged plate 0.375 through 8.00 inches (9.5 through 203.2 mm).1.2 ApplicationThis product has been used typically for heat treated parts requiring a combination of high strength, toughness, and weldability, but usage is not limited to such applications.2. APPLICABLE DOCUMENTSThe i
7、ssue 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 has been cancelled a
8、nd no superseding document has been specified, the last published issue of that document shall apply.2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2242 T
9、olerances, Corrosion hardness, tensile, and impact testing shall be performed in accordance with ASTM A 370:3.5.1 As Solution Heat Treated3.5.1.1 HardnessShall be not lower than 42 HRC, or equivalent (See 8.3).3.5.1.2 MacrostructureVisual examination of transverse full cross sections from slabs, bil
10、lets, or suitable rerolled product, etched in hot hydrochloric acid in accordance with ASTM A 604, shall show no pipe or cracks. Porosity, segregation, inclusions, and other imperfections shall be no worse than the macrographs of ASTM A 604 shown in Table 2. TABLE 2 MACROSTRUCTURE LIMITSClass Condit
11、ion Severity1Freckles B2 White Spots C3 Radial Segregation C4 Ring Pattern D3.5.2 After AgingSpecimens from plate shall meet the requirements of 3.5.2.1, 3.5.2.2, and 3.5.2.3 after being aged by heating to 950 F 10 (510 C 6), holding at heat for not less than 5 hours for sections 2.0 inches (51 mm)
12、and under in nominal thickness and for 10 hours + 0.5, -0, for thicker sections, and cooling at a rate equivalent to air cooling.3.5.2.1 Tensile PropertiesShall be as shown in Table 3.SAE INTERNATIONAL AMS6544D Page 4 of 6TABLE 3A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITSNominal ThicknessInches
13、TensileStrengthksiYield Strengthat 0.2% OffsetksiElongationin 4D%Reductionof Area%0.375 to 2.000, incl 190 180 14 62Over 2.000 to 4.000, incl 190 175 15 60Over 4.000 to 8.000, incl 190 170 15 50TABLE 3B - MINIMUM TENSILE PROPERTIES, SI UNITSNominal ThicknessMillimetersTensileStrengthMPaYield Strengt
14、hat 0.2% OffsetMPaElongationin 4D%Reductionof Area%9.52 to 50.80, incl 1310 1241 14 62Over 50.80 to 101.60, incl 1310 1207 15 60Over 101.60 to 203.20, incl 1310 1172 15 503.5.2.1.1 Mechanical property requirements for product outside the size range covered by Table 3 shall be agreed between purchase
15、r and producer.3.5.2.2 Impact StrengthShall be as shown in Table 4 when tested in the longitudinal direction. Product meeting the requirements of Table 4 when tested in the transverse direction need not be tested in the longitudinal direction.TABLE 4A - IMPACT STRENGTH, INCH/POUND UNITSNominal Thick
16、nessInchesCharpy V-Notchat 0 FFoot Pounds0.500 to 2.000, incl 65Over 2.000 to 4.000, incl 45Over 4.000 to 8.000, incl 40TABLE 4B - IMPACT STRENGTH, SI UNITSNominal ThicknessMillimetersCharpy V-Notchat -18 CJ12.70 to 50.80, incl 81Over 50.80 to 101.60, incl 61Over 101.60 to 203.20, incl 543.5.2.3 Fra
17、cture ToughnessShall be not lower than 175 ksi (192 MPa ), determined in the longitudinal (T-L) and transverse (L-T) direction in accordance with ASTM E 399 using the compact tension specimen. Fracture toughness requirements do not apply to plate under 0.500 inch (12.70 mm) in nominal thickness.3.5.
18、2.3.1 Fracture toughness testing in the longitudinal direction is not required on plate tested in the transverse direction.3.6 QualityPlate, 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
19、product.SAE INTERNATIONAL AMS6544D Page 5 of 63.6.1 All plate 0.50 inch (12.7 mm) and over in nominal thickness shall be ultrasonically inspected in accordance with AMS2630 and shall meet Class AA quality requirements as defined therein. Hot-finished surfaces shall be suitably prepared prior to ultr
20、asonic inspection.3.7 TolerancesShall conform to all applicable requirements of AMS2242.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendor of plate shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. Purchaser reserve
21、s the right to sample and to perform any confirmatory testing deemed necessary to ensure that the plate conforms to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsComposition (3.1), hardness (3.5.1.1), macrostructure (3.5.1.2), tensile properties (3.5.2.1), impact strength (
22、3.5.2.2), ultrasonic inspection (3.6.1), and tolerances (3.7) are acceptance tests and shall be performed on each heat or lot as applicable.4.2.2 Periodic TestsFracture toughness (3.5.2.3) is a periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is
23、specified by purchaser.4.3 Sampling and TestingShall be in accordance with AMS2370.4.4 Reports4.4.1 The producer of plate shall furnish with each shipment a report showing producer identity and country where the metal was melted (e. g., final melt in the case of metal processed by multiple melting o
24、perations) and the results of tests for composition and macrostructure of each heat, hardness, tensile, and impact properties of each lot, ultrasonic soundness of each plate and, when performed, results of tests for fracture toughness, and stating that the product conforms to the other technical req
25、uirements. This report shall include the purchase order number, heat and lot numbers, AMS6544D, size, and quantity.4.4.2 When the product size is outside the size range of 1.1, the report shall contain a statement to that effect.4.5 Resampling and RetestingShall be in accordance with AMS2370.5. PREP
26、ARATION FOR DELIVERY5.1 IdentificationShall be in accordance with AMS2807.5.2 Protective TreatmentPlate shall be protected from corrosion prior to shipment.SAE INTERNATIONAL AMS6544D Page 6 of 65.3 PackagingPlate shall be prepared for shipment in accordance with commercial practice and in compliance
27、 with applicable rules and regulations pertaining to the handling, packaging, and transportation of the plate to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENTA vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase ord
28、ers.7. REJECTIONSPlate not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.8. NOTES8.1 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 b
29、een made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revision. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only.8.2 The temper
30、ature of the agitated-water quenching bath is an important factor in the development of adequate mechanical properties. Quenching water temperature not over 70 F (21 C) at the end of the quenching operation has been found to be satisfactory.8.3 Hardness conversion tables for metals are presented in
31、ASTM E 140.8.4 Terms used in AMS are clarified in ARP1917.8.5 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented
32、only for information.8.6 Purchase documents should specify not less than the following:AMS6544DForm and size of plate desiredQuantity of plate desiredApplicable method of identification marking (See AMS2807)Property and acceptance requirements from the cognizant engineering organization applicable to sizes outside the range listed in 1.1.PREPARED BY AMS COMMITTEE “E”.
