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 2017 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:/standards.sae.org/AMS6330J AEROSPACE MATERIAL SPECIFICATION AMS6330 REV. J Issued 1939-12 Reaffirmed 2006-02 Revi
5、sed 2017-08 Superseding AMS6330H Steel Bars, Forgings, and Tubing 0.65Cr - 1.25Ni (0.33 - 0.38C) (Composition similar to UNS K22033) RATIONALE AMS6330J results from a Five-Year Review and update of this specification that revises grain size determination (3.1.1 and 3.3.2) and decarburization testing
6、 (3.3.4.5), revises quality (3.4.2), testing frequency (4.2), reporting (4.4) and identification (5.2). 1. SCOPE 1.1 Form This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock. 1.2 Application These products have been used
7、typically for parts 0.750 inch (19.05 mm) and under in nominal section thickness at time of heat treatment and requiring a through-hardening steel capable of developing minimum tensile strength of 180 ksi (1241 MPa) at the section center when hardened and tempered, and for parts of greater section t
8、hickness, but requiring proportionately lower strength, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publi
9、cations shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific
10、exemption has been obtained. SAE INTERNATIONAL AMS6330J Page 2 of 9 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2251 Tolerances Low-Alloy Steel Ba
11、rs AMS2253 Tolerances Carbon and Alloy Steel Tubing AMS2259 Chemical Check Analysis Limits Wrought Low-Alloy and Carbon Steels AMS2301 Steel Cleanliness, Aircraft Quality Magnetic Particle Inspection Procedure AMS2370 Quality Assurance Sampling and Testing Carbon and Low-Alloy Steel Wrought Products
12、 and Forging Stock AMS2372 Quality Assurance Sampling and Testing Carbon and Low-Alloy Steel Forgings AMS2806 Identification Bars, Wire, Mechanical Tubing, and Extrusions Carbon and Alloy Steels and Corrosion and Heat-Resistant Steels and Alloys AMS2808 Identification Forgings ARP1917 Clarification
13、of Terms Used in Aerospace Metals Specifications AS1182 Standard Stock Removal Allowance Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubing 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel
14、: 610-832-9585, www.astm.org. ASTM A255 Determining Hardenability of Steel ASTM A370 Mechanical Testing of Steel Products ASTM E112 Determining Average Grain Size ASTM E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Har
15、dness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness ASTM E350 Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought Iron ASTM E381 Macroetch Testing Steel Bars, Billets, Blooms, and Forgings ASTM E384 Microindentation Hardness of Materials S
16、AE INTERNATIONAL AMS6330J Page 3 of 9 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 E350, by spectrochemical methods, or by other analytical methods acceptable to purchaser. Table 1 -
17、Composition Element Min Max Carbon Manganese Silicon Phosphorus Sulfur Chromium Nickel Molybdenum Copper 0.33 0.60 0.15 - - 0.55 1.10 - - 0.38 0.80 0.35 0.025 0.025 0.75 1.40 0.06 0.35 3.1.1 Aluminum, vanadium and columbium are optional grain refining elements and need not be determined or reported
18、unless used to satisfy the average grain size requirements of 3.3.2.2. 3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS2259. 3.2 Condition The product shall be supplied in the following condition; hardness and tensile strength shall be determined in accordanc
19、e with ASTM A370: 3.2.1 Bars Bars shall not be cut from plate (also see 4.4.2). 3.2.1.1 Bars 0.500 Inch (12.70 mm) and Under in Nominal Diameter or Least Distance Between Parallel Sides Cold finished having tensile strength not higher than 130 ksi (896 MPa) or hardness not higher than 29 HRC or equi
20、valent (see 8.2). 3.2.1.2 Bars Over 0.500 Inch (12.70 mm) in Nominal Diameter or Least Distance Between Parallel Sides Hot finished, unless otherwise ordered, and annealed if necessary, having hardness not higher than 229 HB, or equivalent (see 8.2). Bars ordered cold finished may have hardness as h
21、igh as 241 HB, or equivalent (see 8.2). 3.2.2 Forgings Normalized and tempered having hardness not higher than 248 HB, or equivalent (see 8.2). 3.2.3 Mechanical Tubing Cold finished, unless otherwise ordered, having hardness not higher than 25 HRC, or equivalent (see 8.2). Tubing ordered hot finishe
22、d and annealed shall have hardness not higher than 99 HRB, or equivalent (see 8.2). 3.2.4 Forging Stock As ordered by the forging manufacturer. SAE INTERNATIONAL AMS6330J Page 4 of 9 3.3 Properties The product shall conform to the following requirements; hardness testing shall be performed in accord
23、ance with ASTM A370: 3.3.1 Macrostructure Visual examination of transverse full cross-sections from bars, billets, tube rounds (solid, not hollow), and forging stock, etched in hot hydrochloric acid in accordance with ASTM E381, shall show no pipe or cracks. Porosity, segregation, inclusions, and ot
24、her imperfections shall be no worse than the macrographs of ASTM E381 shown in Table 2. Table 2 - Macrostructure limits Cross-Sectional Area Square Inches Cross-Sectional Area Square Centimeters Macrographs Up to 36, incl Up to 232, incl S2 - R1 - C2 Over 36 to 133, incl Over 232 to 858, incl S2 - R
25、2 C3 Over 133 Over 858 Note 1 Note 1 Limits for larger sizes shall be agreed upon by purchaser and producer. The purchaser shall have written approval of the agreement from the cognizant engineering organization. 3.3.1.1 If tubes are produced directly from ingots or large blooms, transverse sections
26、 may be taken from the tubes rather than tube rounds. Macroetch standards for such tubes shall be agreed upon by purchaser and producer. 3.3.2 Average Grain Size of Bars, Forgings and Tubing Average grain size shall be determined by either 3.3.2.1 or 3.3.2.2. 3.3.2.1 Shall be ASTM No. 5 or finer, de
27、termined in accordance with ASTM E112. 3.3.2.2 The product of a heat shall be considered to have an ASTM No. 5 or finer austenitic grain size if one or more of the following are determined by heat analysis (see 8.5): 3.3.2.2.1 A total aluminum content of 0.020 to 0.050%. 3.3.2.2.2 An acid soluble al
28、uminum content of 0.015 to 0.050%. 3.3.2.2.3 A vanadium content of 0.02 to 0.08%. 3.3.2.2.4 A columbium content of 0.02 to 0.05%. 3.3.3 Hardenability of Each Heat Shall be J 4/16 inch (6.3 mm) = 47 HRC minimum and J 8/16 inch (12.7 mm) = 35 HRC minimum, determined on the standard end-quench specimen
29、 in accordance with ASTM A255 except that the steel shall be normalized at 1600 F 10 F (871 C 6 C) and the test specimen austenitized at 1550 F 10 F (843 C 6 C). 3.3.4 Decarburization 3.3.4.1 Bars and tubing ordered ground, turned, or polished shall be free from decarburization on the ground, turned
30、, or polished surfaces. Decarburization on tubing ID shall not exceed the maximum depth specified in Table 4. 3.3.4.2 Allowable decarburization of bars, billets, and tube rounds ordered for redrawing or forging or to specified microstructural requirements shall be as agreed upon by purchaser and pro
31、ducer. 3.3.4.3 Decarburization of bars that 3.3.4.1 or 3.3.4.2 is not applicable shall be not greater than shown in Table 3. SAE INTERNATIONAL AMS6330J Page 5 of 9 Table 3 Table 3A - Maximum depth of decarburization limits, inch/pound units Nominal Diameter or Distance Between Parallel Sides Inches
32、Total Depth of Decarburization Inch Up to 0.375, incl Over 0.375 to 0.500, incl Over 0.500 to 0.625, incl Over 0.625 to 1.000, incl Over 1.000 to 1.500, incl Over 1.500 to 2.000, incl Over 2.000 to 2.500, incl Over 2.500 to 3.000, incl Over 3.000 to 4.000, incl 0.010 0.012 0.014 0.017 0.020 0.025 0.
33、030 0.035 0.045 Table 3B - Maximum depth of decarburization limits, SI units Nominal Diameter or Distance Between Parallel Sides Millimeters Total Depth of Decarburization Millimeters Up to 9.52, incl Over 9.52 to 12.70, incl Over 12.70 to 15.88, incl Over 15.88 to 25.40, incl Over 25.40 to 38.10, i
34、ncl Over 38.10 to 50.80, incl Over 50.80 to 63.50, incl Over 63.50 to 76.20, incl Over 76.20 to 101.60, incl 0.25 0.30 0.36 0.43 0.51 0.64 0.76 0.89 1.14 3.3.4.4 Decarburization of tubing that 3.3.4.1 or 3.3.4.2 is not applicable shall be not greater than shown in Table 4. Table 4 Table 4A - Maximum
35、 depth of decarburization limits, inch/pound units Nominal Wall Thickness Inches Total Depth of Decarburization Inch ID Total Depth of Decarburization Inch OD Up to 0.109, incl Over 0.109 to 0.203, incl Over 0.203 to 0.400, incl Over 0.400 to 0.600, incl Over 0.600 to 1.000, incl Over 1.000 0.008 0.
36、010 0.012 0.015 0.017 0.020 0.015 0.020 0.025 0.030 0.035 0.040 SAE INTERNATIONAL AMS6330J Page 6 of 9 Table 4B - Maximum depth of decarburization limits, SI units Nominal Wall Thickness Millimeters Total Depth of Decarburization Millimeter ID Total Depth of Decarburization Millimeters OD Up to 2.76
37、, incl Over 2.76 to 5.16, incl Over 5.16 to 10.16, incl Over 10.16 to 15.24, incl Over 15.24 to 25.40, incl Over 25.40 0.20 0.25 0.30 0.38 0.43 0.51 0.38 0.51 0.64 0.76 0.89 1.02 3.3.4.5 Decarburization shall be evaluated by one of the two methods of 3.3.4.5.1 or 3.3.4.5.2, selected at the discretio
38、n of the producer. 3.3.4.5.1 Metallographic Method A cross section taken perpendicular to the surface shall be prepared, etched, and visually examined metallographically at a magnification not to exceed 100X. The product shall not show a layer of complete (ferrite) or partial decarburization exceedi
39、ng the limits of Tables 3 and 4. 3.3.4.5.2 Hardness Traverse Method The total depth of decarburization shall be determined by a traverse method using microindentation hardness testing in accordance with ASTM E384, at a magnification not exceeding 100X, conducted on a hardened, but untempered specime
40、n protected during heat treatment to prevent changes in surface carbon content. Depth of decarburization is defined as the perpendicular distance from the surface to the depth under that surface where there is not further increase in hardness. Such measurements shall be far enough away from any adja
41、cent surface to be uninfluenced by any decarburization on the adjacent surface. Acceptance shall be as listed in Tables 3 and 4. 3.3.4.5.3 When determining the depth of decarburization, it is permissible to disregard local areas provided the decarburization of such areas does not exceed the above li
42、mits by more than 0.005 inch (0.13 mm) and the width is 0.065 inch (1.62 mm) or less. 3.3.4.5.4 In case of dispute, the total depth of decarburization determined using the microindentation hardness traverse method shall govern. 3.4 Quality The product, as received by purchaser, shall be uniform in q
43、uality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the product. 3.4.1 Steel shall be aircraft quality conforming to AMS2301. 3.4.2 Bars and mechanical tubing shall, be free from seams, laps, tears, and cracks after removal of the standard stoc
44、k removal allowance in accordance with AS1182. 3.4.3 Grain flow of die forgings, except in areas that contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow. 3.5 Tolerances 3.5.1 Bars In accordance with AMS2251. 3.5.2 Mechanical Tub
45、ing In accordance with AMS2253. SAE INTERNATIONAL AMS6330J Page 7 of 9 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers tests and shall be responsible for the performance of all required tests. Purchaser reserves the
46、 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), macrostructure (3.3.1), average grain size (3.3.2), hardenability (3.3.3), d
47、ecarburization (3.3.4), frequency-severity cleanliness ratings (3.4.1), and tolerances (3.5) are acceptance tests and shall be performed on each heat or lot as applicable. If grain refining elements (3.3.2.2) are not present, the ASTM E112 grain size test (3.3.2.1) shall be conducted on each lot. 4.
48、2.2 Periodic Tests If grain refining elements (3.3.2.2) are present, the ASTM E112 grain size test (3.3.2.1) shall be conducted on a periodic basis and shall be performed at a frequency selected by the producer (not to exceed one year) unless frequency of testing is specified by purchaser. Grain flo
49、w of die forgings (3.4.3) is a periodic test and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing 4.3.1 Bars, Mechanical Tubing, and Forging Stock In accordance with AMS2370. 4.3.2 Forgings In accordance with AMS2372. 4.4 Reports 4.4.1 The producer of bars, forgings and tubing shall furnish with each shipment a re
