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
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:Best Regards,Shashank C Vagal (Quality Adviser), (+91) 8082395502, 8779046302, 74000330711Neo Metal-Analyst & NDT Services (Approved by IBR, Thermax, AERB)Regd Office: 301, PRATHAMESH, M G Rd – Mahant Rd, Vile Parle East, Mumbai 400 057 INDIATel: +91 22 2611 6640 / (+91) 9821386292 / 9819191861Works Office: A-25, Geet Siddhee, Sector No. 11, Pradhikaran, Gat No. 62, Boradewasti, Moshi, Dist: Haveli, PCMC, Pune – 411044, Maharashtra, India
www.neometalanalystndt.com / enquiry@neometalanalystndt.com / nach_sam@yahoo.com
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 .RegardsSNVL.
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