ASTM E407 – 07 PDF

Originally approved in Last previous edition approved in as E–99 DOI: /E 2 For referenced ASTM standards. ASTM E()e1. Standard Practice for Microetching Metals and Alloys. standard by ASTM International, 06/01/ View all product details. Determination of Residual Stresses Numerically Obtained in ASTM AH36 Steel Welded by TIG Process. Pablo Batista Guimarães, Paulo.

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ASTM E407-07 Standard Practice for Microetching Metals and Alloys

Use fresh, but allow to cool. Swab 1—3 s for F and T6, 10 s for T4 and O temper. It may be helpful to place the specimen on a small piece of white paper. Start at 3 V dc.

Colors second phase constituents. Warm specimen in boiling water prior to immersion for 10 to s. Immerse specimen face up, gently agitate solution until coloration begins, allow to settle. For stock solution, mix?

Add 2 drops of HCl just before using. Electrolytic at 6 V for 5—20 s. Use a polyethylene beaker to contain the etchant if it contains? Therefore, a glove must be carefully selected atm used to asstm that it will provide the needed protection for the speci?

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Immerse with gentle agitation 5—15 s. A selection of useful books on this subject is given in Refs. Electrolytic at 6 V for 10—20 s. Electrolytic at 80 V for 5—30 min. Safety precautions and miscellaneous information are also included. Use by immersion only. Electrolytic at 20—60 V for 1—5 min.

Use fresh—immerse few seconds to a minute.

Use Al, Pb, or stainless steel cathode. Electrolytic at asrm V for 10—15 s. Originally approved in Agitate solution gently until coloration begins, allow to settle.

Mix equal volumes of Solutions A and B just before use. Immerse with gentle agitation 5—30 s. Solution composes on standing. Properly discard after use. Austenite turns brown on overetching. Add H2O2 dropwise to maintain action. Additionally, it is recommended that a calcium gluconate 2 cream or other appropriate HF neutralizing agent be available for use if direct skin contact of the etchant occurs. Clean in E4407 if necessary. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability aztm regulatory limitations prior to use.

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Lightly apply etchant over surface until dark stain develops. Etch 2—3 s; 3 s pre-etch in No. Follow with electrolytic etch at low current density in same solution.

ASTM E – 07()e1 Standard Practice for Microetching Metals and Alloys

John Wiley and Sons. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Electrolytic at 30 V for 30 s. Phases can be colored by Nos. Works best with attack-polished specimens. If that does not provide enough detailed information, contact the chemical manufacturer directly.

Storage of fuming etchants in sealed or non-vented containers may create an explosion hazard. Pure V V alloys Zinc Base: Solution decomposes on standing. At 30 V, etch for 1 min. Rinse with ethanol or methanol and blow dry. Immerse in boiling solution for 5 min. The specimen is polished on this wheel until the surface turns black.