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/AMS2221G AEROSPACE MATERIAL SPECIFICATION AMS2221 REV. G Issued 1945-07 Revised 2006-02 Reaffir
5、med 2017-09 Superseding AMS2221F Tolerances Copper and Copper Alloy Bars and Rods RATIONALE AMS2221G has been reaffirmed to comply with the SAE Five-Year Review policy. 1. SCOPE: This specification covers established inch/pound manufacturing tolerances applicable to bars and rods of copper and coppe
6、r alloys ordered to inch/pound dimensions. These tolerances apply to all conditions, unless otherwise noted. The term “exclusive” is used to apply only to the higher figure of a specified range. 1.1 If the tolerance is expressed as a percentage of a specified dimension, the tolerance so calculated s
7、hall be rounded to the nearest 0.001 inch to obtain the permissible tolerance. 2. DIAMETER OR THICKNESS: 2.1 Cold Finished: 2.1.1 Rods; Rounds, Hexagons, and Octagons: See Table 1. 2.1.2 Bars; Squares, and Rectangles: Shall be as follows 2.1.2.1 Copper: See Table 2. 2.1.2.2 Nonrefractory Alloys: See
8、 Table 3. 2.1.2.3 Refractory Alloys: See Table 4. 2.2 Extruded Round, Hexagonal, Octagonal, Square, and Rectangular Shapes: See Table 5. SAE INTERNATIONAL AMS2221G Page 2 of 6 2.3 Hot Finished Rounds: See Table 6. 3. WIDTH: Rectangles, Not Including Squares: See Table 7. 4. LENGTH: Shall be as shown
9、 in Table 8, 4.1, and 4.2. 4.1 Full length pieces specific and stock lengths with or without ends. 4.2 No length tolerances are established for extruded and hot rolled rod. 5. STRAIGHTNESS: 5.1 Cold Finished Rods; Hexagons, Octagons: See Table 9. 5.2 Bars; Squares and Rectangles: When supplied in st
10、raight lengths, in rolls, or on bucks, shall be of such straightness that the maximum edgewise curvature (depth of arc) shall be not greater then 0.50 inch in any 6 feet or length, or 0.083 inch length in feet for shorter lengths. 6. FLATNESS: No requirements specified. 7. SPECIAL TOLERANCES: 7.1 If
11、 tolerances specified herein are plus and minus and if all plus or all minus are desired, use the sum of the plus and minus values specified, neglecting the signs. 7.2 If tolerances specified herein are all plus and if all minus are desired, use the same values specified. 7.3 If tolerances specified
12、 herein are all plus and if plus and minus are desired, halve the values specified. SAE INTERNATIONAL AMS2221G Page 3 of 6 8. NOTES: 8.1 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 been made t
13、o the previous issue of this specification. An (R) symbol to the left of the 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 Ter
14、ms used in AMS are clarified in ARP1917. 8.3 Dimensions and properties in inch/pound units and Fahrenheit temperatures are primary; dimensions and properties in SI units and Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. TAB
15、LE 1 - Diameter or Thickness Tolerances, Cold Finished Rods Specified Diameter or Distance Between Parallel Surfaces Inch Tolerance, Inch Plus and Minus Nonrefractory Round Tolerance, Inch Plus and MinusNonrefractory Hexagonal Octagonal Tolerance, Inch Plus and Minus Refractory Round Tolerance, Inch
16、 Plus and MinusRefractory Hexagonal Octagonal Up to 0.150, incl 0.0013 0.0025 0.002 - Over 0.150 to 0.500, incl 0.0015 0.003 0.002 0.004 Over 0.500 to 1.00, incl 0.002 0.004 0.003 0.005 Over 1.00 to 2.00, incl 0.0025 0.005 0.004 0.006 Over 2.00 0.15% 0.30% 0.20% 0.40% TABLE 2 - Thickness Tolerances,
17、 Copper, Square and Rectangle Bars Specified Thickness Inches Thickness Tolerance Inch Plus and Minus Width Ranges Inch Up to 0.500, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 0.500 to 1.250, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 1.250 to 2.00,
18、incl Thickness Tolerance Inch Plus and Minus Width Ranges Inches Over 2.00 to 4.00, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 4.00 to 8.00, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 8.00 to 12.00, incl Over 0.188 to 0.500, incl 0.003 0.003 0.0035 0
19、.004 0.0045 0.0055 Over 0.500 to 1.00, incl - 0.004 0.004 0.0045 0.005 0.006 Over 1.00 to 2.00, incl - 0.0045 0.0045 0.005 0.006 - Over 2.00 to 4.00, incl - - - 0.30% - - SAE INTERNATIONAL AMS2221G Page 4 of 6 TABLE 3 - Thickness Tolerances, Nonrefractory Alloys, Square and Rectangle Bars Specified
20、Thickness Inches Thickness Tolerance Inch Plus and Minus Width Ranges Inches Up to 0.500, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 0.500 to 1.250, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 1.250 to 2.00, incl Thickness Tolerance Inch Plus and Minu
21、s Width Ranges Inches Over 2.00 to 4.00, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 4.00 to 8.00, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 8.00 to 12.00, incl Over 0.188 to 0.500, incl 0.0035 0.004 0.0045 0.0045 0.006 0.008 Over 0.500 to 1.00, incl
22、 - 0.0045 0.005 0.005 0.007 0.009 Over 1.00 to 2.00, incl - 0.005 0.005 0.006 0.008 - Over 2.00 to 4.00, incl - - - 0.30% - - TABLE 4 - Thickness Tolerances, Refractory Alloys, Square and Rectangle Bars Specified Thickness Inch Thickness Tolerance Inch Plus and Minus Width Ranges Inch Up to 0.500, i
23、ncl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 0.500 to 1.250, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 1.250 to 2.00, incl Thickness Tolerance Inch Plus and Minus Width Ranges Inches Over 2.00 to 4.00, incl Thickness Tolerance Inch Plus and MinusWidth
24、RangesInches Over 4.00 to 8.00, incl Thickness Tolerance Inch Plus and MinusWidth RangesInches Over 8.00 to 12.00, incl Over 0.188 to 0.500, incl 0.005 0.005 0.006 0.007 0.009 0.012 Over 0.500 to 1.00, incl - 0.006 0.007 0.008 0.010 0.013 Over 1.00 to 2.00, incl - 0.006 0.007 0.009 0.011 - Over 2.00
25、 to 4.00, incl - - - 0.50% - - SAE INTERNATIONAL AMS2221G Page 5 of 6 TABLE 5 - Diameter or Thickness Tolerances, Extruded Round, Hexagonal, Octagonal, Square, and Rectangular Shapes Specified Diameter or DistanceBetween Parallel Surfaces Inches Tolerance, InchPlus and MinusNonrefractory Tolerance,
26、Inch Plus and Minus Refractory Over Up to 1.00, incl 0.010 0.020 Over 1.00 to 2.00, incl 0.015 0.030 Over 2.00 to 3.00, incl 0.025 0.050 Over 3.00 to 3.50, incl 0.035 0.070 Over 3.50 to 4.00, incl 0.060 0.120 TABLE 6 - Diameter Tolerances, Hot Finished Rounds Specified Diameter Inches ToleranceInch
27、Plus Tolerance Inch Minus Over 0.250 to 0.250 0.020 0.010 Over 0.250 to 0.750, incl 0.015 0.015 Over 0.750 to 1.25, incl 0.020 0.020 Over 1.25 to 1.50, incl 0.030 0.030 Over 1.50 to 3.00, incl 0.0625 0.0625 Over 3.0 0.125 0.125 TABLE 7 - Width Tolerances, Rectangles Specified Width Inches Tolerance,
28、 InchPlus and MinusCopper and Nonrefractory Tolerance, Inch Plus and Minus Refractory Over 0.188 to 0.500, incl 0.0035 0.005 Over 0.500 to 1.25, incl 0.005 0.007 Over 1.25 to 2.00, incl 0.008 0.010 Over 2.00 to 4.00, incl 0.012 0.015 Over 4.00 to 12.00, incl 0.30% 0.50% TABLE 8 - Length Tolerances L
29、ength Classification Tolerances, All Plus, Inch (ApplicableOnly to Full-Length Pieces) Specific lengths 3/8 Specific lengths with ends 1 Stock lengths with or without ends 1 1 As stock lengths are cut and placed in stock in advance of orders, departure from this tolerance is not practicable. SAE INT
30、ERNATIONAL AMS2221G Page 6 of 6 TABLE 9 - Maximum Curvature, Cold Finished Rods, Hexagons, Octagons Length Feet Curvature (Depth of Arc) Inch Up to 2, excl 1/32 2 to 5, excl 1/32 in any 2 feet of total length 5 to 10, excl 1/8 in any 5 feet of total length 10 and over 1/2 in any 10 feet of total length PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “D”
