it will increase strength, inhibitors fine grains
-- THANKS & BEST REGARDS,
KG.PANDITHAN, IWE, AWS-CWI, CSWIP 3.1,
CONSULTANT-WELDING & QUALITY
On Mon, Nov 30, 2015 at 7:54 PM, Vishwas Keskar Welding Manager Pune India <vvkeskar123@gmail.com> wrote:
Dear Experts ,--
We intend to use SA 516 GR 70 plate - (thickness ranging from 55mm to 100 mm) for steam boiler application.
We are getting plates with Niobium content of 0.04 %.
As per SA 20 corresponding table ,the maximum limit for Nb is 0.02 %
How ever , in the notes of the said Table the Nb can be increased
What is effect of increase, in Nb element on boiler drum shell rolling and welding
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2 comments:
Can we accept the 0.04% Nb if there is no problem w.r.t. Rolling and welding.
refer Note D on Table 1 SA 20
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