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Re: [MW:26685] Nickel Less Than 1%

By Materials & Welding
Please refer below about your query. 
Well Explain by Mr. Goswami
 
Nickel in C-Mn steel increases the acicular ferrite. Usually ferrite in C-Mn steel, which is usually soft is polygonal ferrite. Increase of acicular ferrite causes increase of UTS, impact strength and at the same time hardness also. The last one(hardness control) is  the topmost priority in Sour Service.
 
Theoretical studies and practical work has established that 1% Ni in weld metal is the optimum to get the desired requirements of sour service. Acceptance  of Ni beyond 1% is still debatable and subject to many studies.
 
Please see the attachments for your reference and information.
 
Thanks.
 
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Specialist
Ontario, Canada
pgoswami@quickclic.net
pgoswami@sympatico.ca

On Sat, Jul 22, 2017 at 1:34 PM, 'Shashank Vagal' via Materials & Welding <materials-welding@googlegroups.com> wrote:
Hello dear,
May be you will find it explained more extensively in this article:

https://www.degruyter.com/downloadpdf/j/corrrev.2014.32.issue-3-4/corrrev-2014-0027/corrrev-2014-0027.pdf
 
Best Regards,
Shashank C Vagal  (Quality Adviser), (+91) 8082395502, 8779046302, 74000330711
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On Saturday, 22 July 2017 10:44 AM, sn vl <weldinspn@gmail.com> wrote:


Dear Experts,

In NACE MR0175 Why Ni was restricted less than 1% in Carbon and Low alloy Steels.




Please Clarify .


Regards
SNVL.

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