Hello Limesh,
I had posted a reply earlier to the similar query, which is reposted FYI. In addition the two other attachments ,one from Bohler Thyssen- on the very minute details of 9% Ni steel welding & the other paper from Arcelor, 9% Ni steel base metal would explain the pros and cons of this alloy and it's welding problems.
As explained earlier there are a number of ways to weld this grade of steel.In order to get a matching impact properties in the weld as well as the matching strength , austenitic welding consumables have to be tested to the limits.
What're the design requirements , e.g. design temperature , impact properties/lateral expansion requirements and the grade proposed for fabrication.
Appreciating your response.
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist & Consultant
Ontario,Canada.
Email-pgoswami@sympatico.ca,
- By the way to the best of my knowledge, ASTM-A844(9% Nickel steel , is yet to be incorporated in ASME Sec-II ,Part A Code. I am referencing up to up to July ,2010.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of limesh M
Sent: Wednesday, July 13, 2011 7:25 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:11720] LNG Tank Material selection
Dear Nagarajan,
Thank you for the information and the the time you had taken to review my query.However, I couldn't find A No.5.11 for the corresponding electrode in ASME BPV SEC IX.I think A No:5.11 would be SFA No. of electrode and typing error might have caused the problem.Please correct me,if I am wrong.
Regards,
Limesh
On Mon, Jul 11, 2011 at 6:08 PM, nagarajan uthanmalliah <unaga_1980@yahoo.co.in> wrote:
From: limesh M <limesh78@gmail.com>
Subject: [MW:11666] LNG Tank Material selection
To: "Materials & Welding" <materials-welding@googlegroups.com>
Date: Monday, 11 July, 2011, 2:40 PM
Dear All,
What is the material normally used for LNG(Liquefied Natural Gas) tank fabrication?
I got some information that 9%Ni steel is OK(Still,I am not sure the authenticity of this information).
Apart from 9%Ni,any other material suitable for cryogenic application?
Actually what is this 9%Ni steel?
What is the correct designation of this 9%Ni steel in ASTM?
Regards,
Limesh
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