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/AMS2301K AEROSPACE MATERIAL SPECIFICATION AMS2301 REV. K Issued 1960-01 Revised 2
5、010-08 Reaffirmed 2015-05 Superseding AMS2301J Steel Cleanliness, Aircraft Quality Magnetic Particle Inspection Procedure RATIONALE AMS2301K has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE 1.1 Purpose This specification covers steel cleanliness requirements in inch/pound
6、 units for aircraft-quality ferro-magnetic steels, other than hardenable corrosion resistant steels (See AMS2303), by magnetic particle inspection methods. This specification contains sampling, specimen preparation, inspection procedures and cleanliness rating criteria (See 8.5). 1.1.1 The metric ve
7、rsion, MAM2301, has been cancelled. The SI units have been included in this specification, but the inch/pound units are primary (See 8.5). 1.2 Application This procedure has been used typically for the cleanliness evaluation of blooms, billets, tube rounds, stock for forging or flash welded rings, s
8、labs, bars, sheet, strip, plate, tubing, and extrusions used in fabricating parts subject to magnetic particle inspection, but may be used for qualification of a heat, melt, or lot of steel. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order form
9、s 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 last published issue of that
10、document shall apply. 2.1 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 E 10 Brinell Hardness of Metallic Materials ASTM E 1444 Magnetic Particle Testing 2.2 ANSI Publications Availab
11、le from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ANSI B46.1 Surface Texture 3. TECHNICAL REQUIREMENTS 3.1 Specimen Preparation 3.1.1 Heat Qualification Sampling shall be in accordance with 4.3.1. Samples shall be converted
12、into test specimens in accordance with 3.1.3. 3.1.2 Product Qualification Product from a heat not qualified based on sampling as in 4.3.1 shall be sampled in accordance with 4.3.2. Samples shall be converted into test specimens in accordance with 3.1.3. 3.1.3 Working and Rough Machining 3.1.3.1 Soli
13、d Product 12 Inches (305 mm) and Over in Nominal Diameter or Distance Between Parallel Sides A quarter-section shall be cut from each sample sufficiently oversized that the center of the original sample will be approximately on the surface of the specimen after generating to test size. The quarter-s
14、ection shall then be forged to a 3 to 6 inch (76 to 152 mm) round or square, maintaining the axis of the forging approximately parallel to the original direction of rolling. As an alternate method, the full section may be rolled or forged to a 6-inch (152-mm) round or square and an oversize quarter
15、obtained as in 3.1.3.3. Specimens shall be rough machined to a “one-step” straight cylinder nominally 5 inches (127 mm) long. Minimum stock removal shall be consistent with the machining allowance specified in 3.1.4. 3.1.3.2 Solid Product Over 6 to 12 Inches (152 to 305 mm), Exclusive, in Nominal Di
16、ameter or Distance Between Parallel Sides Except Slabs and Plates A quarter-section shall be cut from each sample sufficiently oversize that the center of the original sample will be approximately on the surface of the specimen after generating to test size. The quarter-section shall be converted in
17、to a test specimen by machining, or forging and machining, to a 3 to 6 (76 to 152 mm) inch round or square. Specimens shall be rough machined to a “one-step” straight cylinder nominally 5 inches (127 mm) long. Minimum stock removal shall be consistent with the machining allowance specified in 3.1.4.
18、 3.1.3.3 Solid Product 6 Inches (152 mm) and Under in Nominal Diameter or Distance Between Parallel Sides Except Flat Bars, Slabs, and Plates A quarter-section shall be cut from each sample sufficiently oversize that the center of the original sample will be approximately on the surface of the speci
19、men after generating to test size. The quarter-section shall be converted into a test specimen by machining to a “one-step” straight cylinder nominally 5 inches (127 mm) long. Minimum stock removal shall be consistent with the machining allowance specified in 3.1.4. 3.1.3.3.1 As an alternate method,
20、 a step-down specimen may be generated from the full cross-section in equal length circumferential steps as shown in Table 1, consistent with the machining allowance specified in 3.1.4. SAE INTERNATIONAL AMS2301K Page 2 of 14_ TABLE 1A - STEPDOWN SPECIMENS, CYLINDRICAL, INCH/POUND UNITS Nominal Diam
21、eter or Distance Between Parallel Sides Inches Step Length Inches Step 1 Diameter Step 2 Diameter Step 3 Diameter Step 4 Diameter Step 5 Diameter 0.250 to 0.500, incl 5.000 D - - - - Over 0.500 to 0.750, incl 2.500 D 2/3D - - - Over 0.750 to 1.000, incl 1.665 D 3/4D 1/2D - - Over 1.000 to 1.500, inc
22、l 1.250 D 4/5D 3/5D 2/5D - Over 1.500 1.000 D 4/5D 3/5D 2/5D 1/5D D = Original diameter or distance between parallel sides minus machining stock removed. TABLE 1B - STEPDOWN SPECIMENS, CYLINDRICAL, SI UNITS Nominal Diameter or Distance Between Parallel Sides Millimeters Step Length Millimeters Step
23、1 Diameter Step 2 Diameter Step 3 Diameter Step 4 Diameter Step 5 Diameter 6.35 to 12.70, incl 127.00 D - - - - Over 12.70 to 19.05, incl 63.50 D 2/3D - - - Over 19.05 to 25.40, incl 42.29 D 3/4D 1/2D - - Over 25.40 to 38.10, incl 31.75 D 4/5D 3/5D 2/5D - Over 38.10 25.40 D 4/5D 3/5D 2/5D 1/5D D = O
24、riginal diameter or distance between parallel sides minus machining stock removed. 3.1.3.4 Flat Bars The type of test and the location in the section shall be as agreed upon by purchaser and vendor. A step-down specimen may be generated from the full cross-section in equal length steps as shown in T
25、able 2. TABLE 2A - STEPDOWN SPECIMENS, FLAT BAR, (INCH/POUND UNITS) Nominal Thickness Inches Step Length Inches Step 1 Thickness Step 2 Thickness Step 3 Thickness Step 4 Thickness Step 5 Thickness Up to 0.250, incl 5.000 T - - - - Over 0.250 to 0.500, incl 2.500 T 2/3T - - - Over 0.500 to 1.000, inc
26、l 1.250 T 3/4T 1/2T 1/4T - Over 1.000 1.000 T 4/5T 3/5T 2/5T 1/5T T = Original nominal thickness minus machining stock removed. SAE INTERNATIONAL AMS2301K Page 3 of 14_ TABLE 2B - STEPDOWN SPECIMENS, FLAT BAR (SI UNITS) Nominal Thickness Millimeters Step Length Millimeters Step 1 Thickness Step 2 Th
27、ickness Step 3 Thickness Step 4 Thickness Step 5 Thickness Up to 6.35, incl 127.00 T - - - - Over 6.35 to 12.70, incl 63.50 T 2/3T - - - Over 12.70 to 25.40, incl 31.75 T 3/4T 1/2T 1/4T - Over 25.40 25.40 T 4/5T 3/5T 2/5T 1/5T T = Original nominal thickness minus machining stock removed. 3.1.3.5 Sla
28、bs or Plates A straight cylindrical or rectangular specimen shall be machined, or forged and machined, from each slab or plate tested. The specimen shall be taken essentially parallel to the direction of rolling, midway between edge and center of the slab or plate width, shall be nominally 5 inches
29、(127 mm) in length, and shall be not more than 4 inches (102 mm) in final diameter or thickness. 3.1.3.5.1 Product Up to 4 Inches (102 mm), Inclusive, in Nominal Thickness A straight cylindrical specimen shall represent the full thickness consistent with the machining allowance specified in 3.1.4.3.
30、 3.1.3.5.2 Product Over 4 to 8 Inches (102 to 203 mm), Inclusive, in Nominal Thickness A straight cylindrical specimen shall represent surface to mid-thickness consistent with the machining allowance specified in 3.1.4.3. 3.1.3.5.3 Product Over 8 Inches (203 mm) in Nominal Thickness A straight cylin
31、drical specimen shall be taken so that the axis is approximately midway between the surface and mid-thickness, and shall have a diameter equal to one-third the nominal thickness of the section, allowing 0.010 inch (0.25mm) per side for finish machining after heat treatment. 3.1.3.6 Tubing 3.1.3.6.1
32、10 inches (254 mm) and Under in Nominal OD Specimens nominally 5 inches (127 mm) in length shall be machined to straight cylindrical sections in accordance with 3.1.4.2.1. 3.1.3.6.2 Over 10 Inches (254 mm) in Nominal OD with Nominal Wall Thickness Up to 2 Inches (51 mm), Inclusive Specimens nominall
33、y 5 inches (127 mm) in length shall be machined to straight cylindrical sections in accordance with 3.1.4.2.2. 3.1.3.6.3 Over 10 Inches (254 mm) in Nominal OD with Nominal Wall Thickness Over 2 to 4 Inches (51 to 102 mm), Inclusive Specimens nominally 5 inches (127 mm) in length representing the ful
34、l cross-section, less the machining allowance specified in 3.1.4.2.2, shall be machined to straight cylindrical sections. SAE INTERNATIONAL AMS2301K Page 4 of 14_ 3.1.3.6.4 Over 10 Inches (254 mm) in Nominal OD with Nominal Wall Thickness Over 4 Inches (102 mm) Specimens nominally 5 inches (127 mm)
35、in length, representing the inside surface to the mid-thickness of the wall, less the machining allowance specified in 3.1.4.2.2, shall be machined to straight cylindrical sections. 3.1.4 Machining 3.1.4.1 Product Other Than Tubing, Flat Bars, and Slab and Plates Over 8 Inches (203 mm) Thick The con
36、verted sample shall be machined to conform to the allowance shown in Table 3 for surface removal, allowing 0.010 inch (0.25 mm) on each side for finish machining after heat treatment. TABLE 3 - STOCK REMOVAL Nominal Diameter or Distance Between Parallel Sides Inches (Millimeters) Minimum Stock Remov
37、al Inch (Millimeters) per Side 0.250 to 0.500 (6.35 to 12.70), incl 0.030 (0.76) Over 0.500 to 0.750 (12.70 to 19.01), incl 0.045 (1.14) Over 0.750 to 1.000 (19.01 to 25.40), incl 0.060 (1.52) Over 1.000 to 1.500 (25.40 to 38.10), incl 0.075 (1.91) Over 1.500 to 2.000 (38.10 to 50.80), incl 0.090 (2
38、.29) Over 2.000 to 2.500 (50.80 to 63.50), incl 0.125 (3.18) Over 2.500 to 3.500 (63.50 to 88.90), incl 0.156 (3.96) Over 3.500 to 4.500 (88.90 to 114.30), incl 0.187 (4.75) Over 4.500 to 6.000 (114.30 to 152.40), incl 0.250 (6.35) 3.1.4.2 Tubing 3.1.4.2.1 10 Inches and Under in Nominal OD Tubing wi
39、th nominal wall thickness under 0.250 inch (6.35 mm) shall have 10% of the wall thickness or 0.015 inch (0.38 mm), whichever is less, removed from the OD after heat treatment. Samples from tubing with nominal wall thickness of 0.250 inch and over shall be machined to conform to the stock removal req
40、uirement shown in Table 4. TABLE 4 - STOCK REMOVAL Machined Diameter Inches(Millimeters) Minimum Stock Removal Inch (Millimeters) per Side Up to 2-1/2 (63.5), incl 0.044 (1.12) Over 2-1/2to 3-1/2 (63.5 to 88.9), incl 0.046 (1.17) Over 3-1/2 to 4-1/2 (88.9 to 114.3),incl 0.052 (1.32) Over 4-1/2 to 5-
41、1/2 (114.3 to 139.7), incl 0.057 (1.45) Over 5-1/2 to 6-1/2 (139.7 to 165.1), incl 0.064 (1.63) Over 6-1/2 to 8 (165.1 to 203.2), incl 0.074 (1.88) Over 8 to 10 (203.2 to 254.0), incl 0.087 (2.21) SAE INTERNATIONAL AMS2301K Page 5 of 14_ 3.1.4.2.2 Tubing Over 10 Inches (254 mm) in Nominal OD Tubing
42、4 inches (102 mm) and under in nominal wall thickness shall be turned to straight cylindrical sections representing the full cross-section of the wall, less allowance of 0.150 inch (0.38 mm) stock removal on the OD and ID and allowing 0.010 inch (0.25 mm) on each side for finish machining after heat
43、 treatment. Samples from tubing with nominal wall thickness over 4 inches (102 mm) shall be turned to cylindrical sections representing the cross section from the OD to mid-thickness of the wall less allowance of 0.150 inch (0.38 mm) stock removal on the OD, and allowing 0.010 inch (0.25 mm) on each
44、 side for finish machining after heat treatment. 3.1.4.3 Flat Bars, Slabs, and Plates Allowance of 20% of the nominal thickness or 0.100 inch (2.54 mm), whichever is less, shall be made for minimum stock removal, allowing 0.010 inch (0.25 mm) on each side for finish machining after heat treatment. 3
45、.1.5 Heat Treatment Rough machined specimens shall, if necessary, be heat treated by suitable austenitizing, quenching, and tempering or by solution and precipitation heat treating to produce hardness of 248 to 352 HB or appropriate lower hardness for steel of low hardenability. Hardness testing sha
46、ll be in accordance with ASTM E 10. Specimens shall be austenitized in a neutral or slightly reducing atmosphere. Following heat treatment, surface scale may be removed by grit blasting or another acceptable method. 3.1.6 Finish Machining The heat treated specimens shall be finished machined to surf
47、ace texture not rougher than 40 microinches AA, determined in accordance with ANSI B46.1. Rateable surface of specimens shall be nominally 5 inches (127 mm) in length. The ends of the specimen shall be finished to provide good electrical contact. 3.2 Inspection Magnetic particle testing shall be performed in accordance with ASTM E 1444 by the circular, wet, continuous method (See 8.3) using 800 to 1200 amperes per inch (32 to 48 amperes/mm) of diameter, or another magnetic particle procedure acceptable to purchser. If the stepdown bar (3.1.3.3.1 or 3.1.3.4) is used, the
