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 ther
2、efrom, 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
3、publication 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: +1 724-776-49
4、70 (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/J444_201710 SURFACE VEHICLE RECOMMENDED PRACTICE J444 OCT2017 Issued 1946-01 Revised 2012-09 R
5、eaffirmed 2017-10 Superseding J444 SEP2012 Cast Shot and Grit Size Specifications for Peening and Cleaning RATIONALE J444 has been reaffirmed to comply with the SAE Five-Year Review policy. 1. SCOPE This SAE Recommended Practice pertains to blast cleaning and shot peening and provides for standard c
6、ast shot and grit size numbers. For shot, this number corresponds with the opening of the nominal test sieve, in ten thousandths of inches1, preceded by an S. For grit, this number corresponds with the sieve designation of the nominal test sieve with the prefix G added. These sieves are in accordanc
7、e with ASTM E 11. The accompanying shot and grit classifications and size designations were formulated by representatives of shot and grit suppliers, equipment manufacturers, and automotive users. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to
8、the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 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 11 Standard Specificat
9、ions for Wire Cloth Sieves for Testing Purposes ASTM E 29 Using Significant Digits in Test Data to Determine Conformance with Specification 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this SAE Technical Report. 2.2.1 S
10、AE 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), www.sae.org. SAE J445 Metallic Shot and Grit Mechanical Testing SAE J827 High-Carbon Cast-Steel Shot SAE J1993 High-Carbon Cas
11、t Steel Grit SAE J2175 Specifications for Low Carbon Cast Steel Shot 3. TESTING PROCEDURE - SIEVE ANALYSIS 3.1 Equipment 3.1.1 A rotating and tapping type of testing machine shall be used. 3.1.1.1 The shaking speed shall be 270 to 300 rpm. 3.1.1.2 The taps per minute shall be 140 to 160 when tapping
12、 machines are used. 3.2 Sieves 3.2.1 The testing sieves shall be in accordance with ASTM E 11. They shall be of the 203 mm (8 in) diameter series, of either 25 mm (1 in) or 51 mm (2 in) height. 3.3 Procedure 3.3.1 A 100 g sample of the shot or grit shall be obtained from a representative quantity. 3
13、.3.2 The sample shall be placed on the top sieve of a stack of three or four sieves, depending on media and size (Figures 1 and 2). Nest the selected sieves and fit a pan to the bottom sieve. 3.3.3 The sample shall be run in the testing machine for 5 min 5 s for sizes using sieve designation 35 or c
14、oarser and 10 min 5 s for sizes using sieve designation finer than 35. 3.3.4 The stack of sieves shall be removed from the testing machine and the percentage of total weight shall be recorded for the media remaining on each sieve. SAE INTERNATIONAL J444 OCT2017 Page 2 of 5_ 3.4 Any alternate method
15、agreed upon by the supplier and the user which gives equivalent results will be acceptable. 3.5 For purposes of determining conformance with these specifications, an observed value or a calculated value shall be rounded “to the nearest unit” in the last right-hand digit used in expressing the specif
16、ication limit, in accordance with the rounding method of ASTM E 29. 4. NOTES4.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. A
17、n (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE SURFACE ENHANCEMENT COMMITTEE SAE INTERNAT
18、IONAL J444 OCT2017 Page 3 of 5_ Sieve OpeningStandar d Sieve Designation NominalSieve OpeningTest Sieve Opening Sieve and Designation WithMaximum and Minimum Cumulative PercentagesAllowed on Corresponding Test Sieves SAE Shot Numbers (mm1) (in) S1320 S1110 S930 S780 S660 S550 S460 S390 S330 S280 S23
19、0 S170 S110 S70 4.75 4 (0.187) 0% max - - - - - - - - - - - - - 4.00 5 (0.157) - 0% max - - - - - - - - - - - - 3.35 6 (0.132) 90% MIN - 0% max - - - - - - - - - - - 2.80 7 (0.111) 97% MIN 90% MIN - 0% max - - - - - - - - - - 2.36 8 (0.0937) - 97% MIN 90% MIN - 0% max - - - - - - - - - 2.00 10 (0.07
20、87) - - 97% MIN 85% MIN - 0% max 0% max - - - - - - - 1.70 12 (0.0661) - - - 97% MIN 85% MIN - 5% max 0% max - - - - - - 1.40 14 (0.0555) - - - - 97% MIN 85% MIN - 5% MAX 0% max - - - - - 1.18 16 (0.0469) - - - - - 97% MIN 85% MIN - 5% MAX 0% max - - - - 1.00 18 (0.0394) - - - - - - 96% MIN 85% MIN
21、- 5% MAX 0% max - - - 0.85 20 (0.0331) - - - - - - - 96% MIN 85% MIN - 10% MAX 0% max - - 0.71 25 (0.0278) - - - - - - - - 96% MIN 85% MIN - 10% MAX - - 0.60 30 (0.0234) - - - - - - - - - 96% MIN 85% MIN - 0% max - 0.50 35 (0.0197) - - - - - - - - - - 97% MIN - 10% MAX - 0.425 40 (0.0165) - - - - -
22、- - - - - - 85% MIN - 0% max 0.355 45 (0.0139) - - - - - - - - - - - 97% MIN - 10% MAX 0.300 50 (0.0117) - - - - - - - - - - - - 80% MIN - 0.180 80 (0.0070) - - - - - - - - - - - - 90% MIN 80% MIN 0.125 120 (0.0049) - - - - - - - - - - - - - 90% MIN 0.075 200 (0.0029) - - - - - - - - - - - - - - FIG
23、URE 1 - CAST SHOT SPECIFICATION FOR SHOT PEENING OR BLAST CLEANING SAE INTERNATIONALJ444 OCT2017Page 4 of 5_ Sieve OpeningStandard Sieve DesignationNominalSieve OpeningTest Sieve Opening Sive and Designation With Minimum Cumulative Percentages Allowed on Corresponding Test Sieves SAE Grit Numbers (m
24、m1) (in) G10 G12 G14 G16 G18 G25 G40 G50 G80 G120 G200 G325 4.75 4 (0.187) - - - - - - - - - - - - 4.00 5 (0.157) - - - - - - - - - - - 3.35 6 (0.132) - - - - - - - - - - - - 2.80 7 (0.111) 0% max - - - - - - - - - - - 2.36 8 (0.0937) - 0% max - - - - - - - - - - 2.00 10 (0.0787) 80% min - 0% max -
25、- - - - - - - - 1.70 12 (0.0661) 90% min 80% min - 0% max - - - - - - - - 1.40 14 (0.0555) - 90% min 80% min - 0% max - - - - - - - 1.18 16 (0.0469) - - 90% min 75% min - 0% max - - - - - - 1.00 18 (0.0394) - - - 85% min 75% min - 0% max - - - - - 0.85 20 (0.0331) - - - - - - - - - - - - 0.71 25 (0.
26、0278) - - - - 85% min 70% min - 0% max - - - - 0.60 30 (0.0234) - - - - - - - - - - - - 0.50 35 (0.0197) - - - - - - - - - - - - 0.425 40 (0.0165) - - - - - 80% min 70% min - 0% max - - - 0.355 45 (0.0139) - - - - - - - - - - - - 0.300 50 (0.0117) - - - - - - 80% min 65% min - 0% max - - 0.180 80 (0
27、.0070) - - - - - - - 75% min 65% min - 0% max - 0.125 120 (0.0049) - - - - - - - - 75% min 60% min - 0% max 0.075 200 (0.0029) - - - - - - - - - 70% min 55% min - 0.045 325 (0.0017) - - - - - - - - - - 65% min 20% min FIGURE 2 - CAST GRIT SPECIFICATION FOR BLAST CLEANING SAE INTERNATIONALJ444 OCT2017Page 5 of 5_
