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ASTM E381 PDF

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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Other rating methods may be established per agreement between the user and producer. Significance and Use 4.

ASTM E – 17 Standard Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings

Register for a trial account. E Standard Terminology Relating to Metallography. Rating of each condition is accomplished by measurement. Do not place specimens in a cold solution and then heat it to the desired temperature. A freshly made solution is necessary for best results. Link to Active This link will always route to ast current Active version of the standard. With reductions over a 3: If metal tanks are used, lead is most xstm for containing sulfuric acid solutions while high-nickel iron or high-silicon iron are preferred to contain hydrochloric acid solutions.

A nickel-molybdenum alloy can be used for containing solutions of sulfuric or hydrochloric acid, or both. Any grease, oil, or other residue will produce an uneven attack and must be removed. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Development of grain flow in a forged part or fastener, which is a critical property for the integrity of the forging. When the use of a reagent other than those described in 5. Copyright E38, Inc. Remember me for one month. The usual procedure is to take a roughing cut, then a?

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Macroetch Examinations

This standard has been approved for use by agencies of the Department of Defense. 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. Other applications of macroetching include: The metallurgical engineering team at SGS MSi has the expertise to meet all your material requirements for acid etch processes.

For ingot cast product, the specimen is usually taken atm ingot breakdown. Small pieces may be etched in glass or porcelain vessels of the types commonly available in laboratories. Larger disks are etched in corrosionresistant alloy vessels, various types of ceramic pots, rubberlined kettles or wooden tanks. Steels react differently to etching reagents because of variations in chemical composition, method of manufacture, heat treatment and many other variables.

Sharp tools are necessary to produce a good specimen. 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: Click here to download aastm list of books.

ASTM-E, –

Precision and Bias Also report the presence of any of the conditions in Plate II. 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.

Dark center is solid material and should not be confused with center unsoundness. 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.

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In an etched transverse section, they appear as short, tight discontinuities which are usually located in the midway to center location of the section. Print 1 2 3 4 5 page sstarting from page current page. Evaluation of heat treated parts to determine locations of hard or soft spots, tong marks, quench cracks, case depth in induction hardened or carburized parts, and effectiveness of stop-off coatings.

Continuously cast steel blooms and billets, in the as cast condition, shall be examined according to the procedures described in Sections 10 and Etch the specimens to reveal the structure clearly and then remove it from the etch bath.

The method is limited in application to bars, e3881, blooms, and forgings of carbon and low alloy steels. They are also known as shatter cracks or hairline cracks.

A number in parentheses indicates the year of last reapproval. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Originally approved in The method employs the action of an acid or other corrosive agent to develop the macrostructural characteristics of a suitably prepared specimen.

Remove the smut that forms on the specimen surface by scrubbing the surface with a stiff brush under hot running water.

Some of the conditions are represented by sketches drawn on the photomacrographs.