FW: [MW:4161] Underclad cracking tests

Hi Prem,

Could you be more specific about your query:-

· Underclad Cracking Test— is it related to SAW strip cladding of S.S / Inconel on Reactor Pressure Vessels (RPV) shells. What kind of reheat cracking tests you have to do? Usually reheat cracking is very difficult to simulate.

· Regarding hydrogen cracking, there are standard tests developed and adopted by the industry. If you are familiar with Tekken Y-Grove test, it's a very popular test for hydrogen cracking. What's the test you're asked to perform in this case.

However underclad hydrogen cracking is a bit different issue. Typically it's commonly performed as autoclave testing, and ASTM –G-146, is the standard followed for this underclad hydrogen disbanding test.

Due to copyright issue, I can not post the ASTM standard. However the attached article tells clearly how this test is performed.

Thanks

Pradip Goswami,P.Eng

Senior Engineer/Specialist(Welding-Metallurgy)

Engineering & Training Services Division

ONTARIO POWER GENERATION Inc.

PO Box-2000, RR-55(South)

Nanticoke, Ontario,N0A1L0

Tel:-(519) 587-2201, Ext 3107--in Nanticoke

(416) 231-4111, Ext 5925--in Kipling,Toronto

Fax: (519) 587-6814

Email-pradip.goswami@opg.com.

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: Wednesday, January 27, 2010 1:20 PM
To: materials-welding@googlegroups.com
Subject: *****SPAM***** [MW:4160] Underclad cracking tests

Dear All

Can anyone provide some article / explanation / detailed procedure about how to prepare specimens and conduct test for the following Underclad cracking test ---

1)Weld specimen for reheat cracking.
2)weld specimen for Hydrogen induced cracking.

The job is a PV, code of construction is ASME Sec III, NB.

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

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