Hi,
IGC Testing Practice A is Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels.
and
Practice E is Copper–Copper Sulfate–Sulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
So as indicated above, Practice A is rapid method of identifying, by simple etching, those specimens of certain stainless steel grades that are essentially free of susceptibility to intergranular attack associated with chromium carbide precipitates. As a result of this some specimens can be acceptabe and does not need further testing (B,C,E,F). Hence first this test is carried out for each material at first when Owner doesnot specify anything.
However in most cases owner specifies Practice E for Austenitic Stainless Steel.
Hope this helps.
Regards;
Purav Desai.
On Mon, Mar 25, 2013 at 8:19 PM, <fsachin@gmail.com> wrote:
> You can perform both Pracice A as well E for SS. Basicallly it is as per the requirement of service condtion which tobe decided by designer/Clinet at per bid level. Please refer ASTM A262 for details.
>
> ----------
> Sent via Nokia Email
>
> ------Original message------
> From: Venkatesh <vpv_333@yahoo.com>
> Date: Sunday, March 24, 2013 11:18:59 PM GMT-0700
> Subject: [MW:17211] IGC Practice A and E
>
> Dear Expert,
>
> What is the difference between IGC practice 'A' and 'E'?
>
> Which is recommended for Austenitic stainless steels?
>
> Thanks & Regards
>
> P.Venkatesh
>
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Regards;
Purav DESAI
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