Find the most up-to-date version of ASTM E at Engineering Macroetching, also known as deep etching, involves etching specimens prepared with a suitable acid or reagent for macrostructural examination. Contact us. Purchase your copy of ASTM E – 17 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available.
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Small pieces may be etched in glass or porcelain vessels of the types commonly available in laboratories.
The sectioning of the large specimens should be done so as not to disturb the central portion of the section. NOTE 1—The addition of hydrogen peroxide H2O2 may be necessary in order to provide sufficient reaction asttm properly etch some types of product.
Development of grain flow in a forged part or fastener, which is a critical property for the integrity of the forging.
ASTM E – 17 Standard Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
Examination and rating of specimens shall be in accordance with Sections 10 and 11 of this E standard. Conditions to be rated and their level may be established by agreement between the purchaser and producer.
If you feel that r381 comments have astn received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. The reagent should be used under a fume hood, or some other means of carrying off the corrosive fumes must be e318.
Examination of Continuously Cast Product Specimens Macroetch Examinations Macroetching, also known as deep etching, involves etching specimens prepared with a suitable acid or reagent for macrostructural examination at low magnifications and rating by a grades series of photographs showing the incidence of certain conditions such as: Any grease, oil, or other residue will produce an uneven attack and must be removed.
Copyright Compu-tecture, Inc. Plate III is used to identify the type of condition observed on the macroetch specimens. Last previous edition atm in as E — Precision and Bias The usual procedure is to take a roughing cut, then a? The method employs the action of an acid or other corrosive agent to develop the macrostructural characteristics of a suitably prepared specimen.
In ingot cast f381, it is sometimes called ingotism or ingot pattern. Examination and rating of specimens shall be in accordance with Sections 10 and 11 of this E standard.
ASTM E – 01 Standard Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. The use of this reagent necessitates a smooth surface. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk e318 infringement of such rights, are entirely their own responsibility.
Sufficient torch cut material should be removed by cold cutting to eliminate the thermal effects of torch cutting. In most cases, 15 to 30 min will be sufficient for hot-acid etching. A number in parentheses indicates the year of last reapproval. It may be necessary to use solvents to clean the surface. A freshly made solution is necessary for best results. Inspection is most effective when done while the piece is still wet.
Click here to download full list of books. Print 1 2 3 4 5 page sstarting from page current page. After the smut is removed, rinse the specimen under asm running water and blow it dry with compressed air. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Establishment of general standards for acceptance or rejection for all conditions is impractical as some conditions must be considered relative to the part in which it occurs.
Contact our sales team to assist in specification review or a cost estimate for your testing. Evaluation of machined parts for grinding cracks in tools and dies.
Grinding, which also may be used, is usually conducted in the same manner, using free-cutting wheels and light feeds. The acids are strong and they can cause serious chemical burns. E — 01 5. Today, some 12, ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. Significance and Use 4. Dried surfaces may be protected with oil or a transparent lacquer.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. With reductions over a 3: Disks may be faced on a lathe or a shaper.
Link to Active This link will wstm route to the current Active version of the standard.
ASTM E381 – 17
In those cases, circular conditions shall be rated as the average of the maximum length and maximum width of the condition and expressed as a percentage of the square root of the transverse area of the specimen. Macroetching, also known adtm deep etching, involves etching specimens prepared with a suitable acid or reagent for macrostructural examination at low magnifications and rating by a grades series of photographs showing the incidence of certain conditions such as: Do not place specimens in a cold solution and then asfm it to the desired temperature.
This will generate a smooth surface and remove cold work from prior operations. This standard has been approved for use by agencies of the Department of Defense.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Once cleaned, care should be taken to avoid touching or otherwise contaminating the surface.