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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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. Grinding, which also may be used, is usually conducted in the same manner, using free-cutting wheels and light feeds.
Sufficient torch cut material should be removed by cold cutting to eliminate the thermal effects of torch cutting. They are also known as shatter cracks or hairline cracks.
E — 01 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. The best time for examination is immediately after drying. The solution should be swabbed on the?
Splash is normally associated with molten steel which solidi? The specimens may be axtm directly into the solution, but the best practice is to place the specimen in corrosion-resistant baskets or on corrosion-resistant supports, such as glass rods underneath the specimen to raise it off the bottom of the dish.
Precision atsm Bias The method employs the action of an acid or other corrosive agent to develop the macrostructural characteristics of a suitably prepared specimen. In highly rectangular product, circular conditions may not be compatible with this rating method. The most common reagent for macroetching iron and steel is a 1: In ingot cast product, it is sometimes called ingotism or ingot pattern. It may be necessary to use solvents to clean the surface.
Larger disks are etched in corrosionresistant alloy vessels, various types of ceramic pots, rubberlined kettles or wooden tanks. Inspection is most effective when done while the piece is still wet.
Photographs for Rating Macroetched Steel 3 plates 3 3. FORMAT Single Astn Subscription Site License Subscription BOOKS All Books PACKAGES All Packages EDITION to PUBLISHER. Other applications of macroetching include: Steels react differently to etching reagents because of variations in chemical composition, method of manufacture, heat treatment and many other variables.
E — 01 5. The acids are strong and they can cause serious chemical burns. Examination of Ingot Cast Product Specimens 9. A number in parentheses indicates the year of last reapproval.
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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. Macroetching, also known as deep etching, involves etching specimens prepared with a suitable acid f381 reagent for macrostructural examination at low magnifications and rating by a grades series of photographs showing the incidence of certain conditions such as: With reductions over a 3: Significance and Use 4.
ASTM E381 – 17
Aetm of each condition is accomplished by measurement. Continuously cast steel blooms and billets, in the as cast condition, shall be examined according to the procedures described in Sections 10 and Dark center is solid material and should not be confused with center unsoundness. No items in cart. The method is limited in application to bars, billets, blooms, and forgings of carbon and low alloy steels. Copyright Compu-tecture, Inc.
Study of weld structures, definition of weld penetration, dilution of filler metal by base metals, entrapment of flux, porosity, and cracks in weld and heat affect zones, asm.