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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 therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. QUESTIONS REGARDING THIS DOCUMENT: (412) 772-8512 FAX: (412) 776-0243 TO PLACE A DOCU
3、MENT ORDER; (412) 776-4970 FAX: (412) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1993 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE An American National Standard J444 REV. M
4、AY93 Issued1946-01 Revised1993-05 Superseding J444 AUG84 (R) CAST SHOT AND GRIT SIZE SPECIFICATIONS FOR PEENING AND CLEANING 1.ScopeThis SAE Recommended Practice pertains to blast cleaning and shot peening and provides for standard cast shot and grit size numbers. For shot, this number corresponds w
5、ith 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 accordance with ASTM E 11. The accompanying shot and grit classifications an
6、d size designations were formulated by representatives of shot and grit suppliers, equipment manufacturers, and automotive users. 2.References 2.1Applicable PublicationThe following publication forms a part of this specification to the extent specified herein. 2.1.1ASTM PUBLICATIONAvailable from AST
7、M, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM E 11Standard Specifications for Wire Cloth Sieves for Testing Purposes 2.2Related PublicationsThe following publications are provided for information purposes only and are not a required part of this document. The latest issue of SAE p
8、ublications shall apply. 2.2.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J445Metallic Shot and Grit Mechanical TestingFor Information on Shot Durability Determination SAE J827Cast Steel ShotFor Information on Composition and Shapes SAE J1993Cast Steel
9、GritFor Information on Composition and Shapes SAE J2175Low Carbon Steel ShotFor Information on Composition and Shapes 1.Example: S-550 indicates a cast steel shot identified by a nominal sieve opening of 0.0555 in. SAE J444 Revised MAY93 -2- 3.Testing ProcedureSieve Analysis 3.1Equipment 3.1.1A rota
10、ting and tapping type of testing machine shall be used. 3.1.1.1The shaking speed shall be 275 to 295 rpm. 3.1.1.2The taps per minute shall be 145 to 160 when tapping machines are used. 3.2Sieves 3.2.1The testing sieves shall be in accordance with ASTM E 11. They shall be of the 203 mm (8 in) diamete
11、r series, of either 25 mm (1 in) or 51 mm (2 in) height. 3.3Procedure 3.3.1A 100 g sample of the shot or grit shall be obtained from a representative quantity. 3.3.2The 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
12、 selected sieves and fit a pan to the bottom sieve. 3.3.3The sample shall be run in the testing machine for 5 min 5 s for sizes using sieve designation 35 or coarser and 10 min 5 s for sizes using sieve designation finer than 35. 3.3.4The stack of sieves shall be removed from the testing machine and
13、 the percentage of total weight shall be recorded for the media remaining on each sieve. 3.4Any alternate method agreed upon by the supplier and the user which gives equivalent results will be acceptable. SAE J444 Revised MAY93 -3- FIGURE 1CAST SHOT SPECIFICATIONS FOR SHOT PEENING OR BLAST CLEANING
14、SAE J444 Revised MAY93 -4- FIGURE 2CAST GRIT SPECIFICATIONS FOR BLAST CLEANING SAE J444 Revised MAY93 -5- 4.Notes 4.1Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions have been made to the previous issue of th
15、e report. An (R) symbol to the left of the document title indicates a complete revision of the report. PREPARED BY THE SAE FATIGUE, DESIGN, AND EVALUATION COMMITTEE SAE J444 Revised MAY93 RationaleNot applicable. Relationship of SAE Standard to ISO StandardNot applicable. ApplicationThis SAE Recomme
16、nded Practice pertains to blast cleaning and shot peening and provides for standard cast shot and grit size numbers. For shot, this number corresponds with the opening of the nominal test sieve, in ten thousandths of inches, preceded by an S. For grit, this number corresponds with the sieve designat
17、ion of the nominal test sieve with the prefix G added. These sieves are in accordance with ASTM E 11. The accompanying shot and grit classifications and size designations were formulated by representative of shot and grit suppliers, equipment manufacturers, and automotive users. Reference Section SA
18、E J445Metallic Shot and Grit Mechanical TestingFor Information on Shot Durability Determination SAE J827Cast Steel ShotFor Information on Composition and Shapes SAE J1993Cast Steel GritFor Information on Composition and Shapes SAE J2175Low Carbon Steel ShotFor Information on Composition and Shapes ASTM E 11Standard Specifications for Wire Cloth Sieves for Testing Purposes Developed by the SAE Fatigue, Design, and Evaluation Committee