Niobium in SA 516 GR 70 PLATE
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Vishwas Keskar Welding Manager Pune India
Nov 30, 2015, 10:29:15 PM11/30/15
to Materials & Welding
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
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
Kannayeram Gnanapandithan
Dec 1, 2015, 12:08:12 AM12/1/15
to materials-welding
it will increase strength, inhibitors fine grains
THANKS & BEST REGARDS,
KG.PANDITHAN, IWE, AWS-CWI, CSWIP 3.1,
CONSULTANT-WELDING & QUALITY
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