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June 14, This Standard will be revised when the Society approves the issuance of a new edition.
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There will be no addenda or written interpretations of the requirements of this Standard issued to this edition. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Consensus Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity t o participate.
The proposed code standard was made available for public review or and comment which provides an opportunity for additional public input fromindustry, academia, regulatory agencies, and the public-at-large. ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.
ASME does not take any position with respect t o the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake insure anyto one utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume any such liability.
Users of a code or standard are expressly advised that the determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by federal agency representative s or person s affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard. ASME accepts responsibility for only those interpretationsissued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual volunteers.
No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permissionof the publisher. The first standard on surface texture was issued in March The dates for the subsequent changes are as follows: A considerable amount of new material has been added, particularly to reflect the increasing number of surface measurement techniques and surface parameters in practical use.
The present Standard includes nine sections: Section 1Terms Related to Surface Texture, contains a number of definitions that are used in other sectionsof the Standard.
Furthermore, a large number surface parameters are defined of in addition to roughness average R.
MIL-STD A NOTICE-2 SURFACE ROUGHNESS WAVINESS LAY
These include rms roughness R, waviness b46. W, the meanspacing of profile irregularities S,, andseveralstatisticalfunctions,aswellassurface parameters for area profiling techniques. Section 2, Classification of Instruments for Surface Texture Measurement, defines six types aasme profilinginstruments, of surface-texturemeasuringinstrumentsincludingseveraltypes scanned probe microscopy, and area averaging instruments.
With this classification scheme, it is possible that future sections may then provide for the specification on drawings of the type of instrument to be used for a particular surface texture measurement. Section 3, Terminology and Measurement Procedures for Profiling, B4.61, Skidless Instruments,isanewsectionbasedonproposalsin I S 0 TechnicalCommittee57todefinethe characteristics of instruments that directly measure surface profiles, which then can serve as input data to the calculations of surface texture Parameters.
Because of the diversity of techniques, very few recommendations can be given Section 5 at this time to facilitate uniformity of results between different techniques. However, this section does allow for b4.1 measurement of the area profiling parameters, AR, and AR, as alternatives to the traditional profiling parameters.
Infuturesections,surfaceparametersbaseddirectlyonthesetechniquesmaybe by these types defined or surface specifications may be proposed that call for measurements of instruments. Sections 7 and 8 have been reserved to accommodate future paragraphs relating to instruments and procedures.
Section 9, Filtering of Surface Profiles, carries on with the traditional specifications of the 2RC cutoff filter and introduces the phase corrected Gaussian filter as well as band-pass roughness concepts. Section 10 has been reserved to accommodate future paragraphs. Section 1 1, Specifications and Procedures for Precision Reference Specimens, describes a number of different types of specimens useful in the calibration and testing of surface profiling instruments. Section 12, Specifications and Procedures for Roughness Comparison Specimens, describes specimens that are useful for the testing and characterization of area averaging instruments.
Approximately 30 people have written, edited, and reviewed this Standard. However, with in the definitions or recommendations mayhave suchanextensiverevision,inconsistencies been overlooked. The user is invited to submit any comments or suggestions to ASME. Grant, Vice Chair P.
Bristow, Chapman Instruments, Inc. Clark, Surface Analytics D. Davie, International Metrology Services, Inc. Drews, International Marketing Services M.
Holzhauer, The Timken Co. Malburg, Cummins Engine Co. Moyer, Rank Taylor Hobson, Inc. NordbergPrecision Devices, Inc.
What is Surface Texture B46.1 for Stainless
Olear, Eastman Kodak J. Risko, Extrude Hone Corp.
Stewart, Micromatic Textron P. Tabenkin, Federal Products Corp. Wheeler, Tencor Instruments, Inc. Brown, Worcester Polytechnic Institute D. Green, Metrology Engineering Ltd. Harnidieh, Ford Motor Co.
Lin, General Motors Corp. McClure, Moore Tool Co.
Parsons, Federal Products Corp. Scott, Texas Instruments R. Swanson, Deere 81 Co. V Terms Related to Surface Texture Classification of Instruments for Surface Texture Measurement Measurement Procedures for Contact, Skidded Instruments Measurement Techniques for Area Profiling Measurement Techniques for Area Averaging Filtering of Surface Profiles Specifications and Procedures for Roughness Comparison Specimens Also Showing adme R,i and R.
Profilometer and 3D Optical Profiler – Filmetrics
Effects of Various Cutoff Values Weighting Function of the Gaussian Profile Filter Tolerances for Types Al and A Recommended R, and S. Tolerances for Types Cl to C Nominal Values of R, and S.
Nominal Values of R, for Type C Tolerances for Unidirectional Irregular Profiles Sampling Lengths for Calibration of Comparison Specimens. G Observations on theFiltering of SurfaceProfiles Dl Average Peak-to-Valley Roughness D2 Average Spacing of Roughness Peaks D3 Swedish Height of Irregularities E4 Area Scanning Stylus Profiler Comparison of Roughness VoidVolumes L 95 0.
This Standard is concerned with the geometric irregularities of surfaces. It defines surface texture and its constituents: It also defines parameters for specifying surface texture. The terms and ratings in this Standard relate to surfaces produced by such means as abrading, casting, coating, cutting, etching, plastic deformation, sintering, wear, erosion, etc.
This Standard is not concerned with error of form and flaws, but discusses these two factors to distinguish them from surface texture. This Standard isnot concerned with luster, appearance, color, corrosion resistance, wear resistance, hardness, subsurface microstructure, surface integrity, and many other characteristics which may govern functional considerations in specific applications.
This Section does not recommend specific surface roughness, waviness, or type of lay suitable for specific purposes, nor does it specify the means by which these irregularities maybe obtained or produced. Criteria for selection of surface qualities and information on instrument techniques and methods of producing, controlling, and inspecting surfaces are included in the other sections and in the appendices.
The appendices shall not be considered a part of this Standard. They are included for clarification and information purposes only. Surface texture designations as delineated in this Standard may not provide a sufficient set of indexes for describing performance. Other characteristics of engineering components such as dimensional and geometrical characteristics, material, metallurgy, and stress must also be controlled.
Approximate nonmetric equivalents are shown for reference. Other relevant standards, which should be used in design and measurement, are: References to other useful works are included as footnotes. Normally, surfaces to be measured should be free of any foreign material that would interfere with the measurement.
Values of quantities stated in the SI’ metric system are to be regarded as standard. Its deviations from the nominal surface stem from the processes that produce the surface. The real surface differs from the nominal surface to the extent thatit exhibits surface texture, flaws,and errors of form.
It is considered as the linear superposition of roughness, waviness, and form with the addition of flaws. These might be characteristic marks left by the processes listed in Fig.