Refer www.haynesintl.com .
It suggest some recommendations for pickling and passivation for hastalloy.
After PWHT, the oxide film is more adherent than normal 18/8 grade stainless steel. Molten caustic bath followed by acid pickling found to be most suitable method.
With Best Regards,
Jignesh R Rana
Manager - Materials Technology, QA/QC & Standards
Linde AG
Linde Engineering Division
Dr.-Carl-von-Linde-Str. 6 - 14
82049 Pullach / Germany
phone: +49 89 7445 - 2360
fax: +49 89 7445 - 4952
e-mail: jignesh.rana@linde-le.com
web: http://www.linde.com
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| Prasad <prsgne@gmail.com> Sent by: materials-welding@googlegroups.com 27.05.11 05:50
|
|
Dear experts,
We are fabricating a pressure vessel with Hastalloy claded plates.
Vessel is to undergo PWHT. I would like to know which is the ASTM
standard covers
pickling of Hastalloy material, like A380 is for SS materials.
Code of construction is ASME Sec. VIII Div. 1 2007.
THanking you in advance.
Prasad
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