[MW:13800] RE: 13799] using E308H-17 instead of E308H-16

Yes the essential variables for filler metals are F-number {QW-404.4} and A-number {QW-404.5}.  Both electrodes will be F-5 and A-8.  Classification is a non-essential variable {QW-404.33} which may be changed without requalification.  If your WPS states specifically that the SMAW electrode be E308-16, you will have to either revise or write a new WPS which permits the use of the -17 electrode.  This should only be a minor inconvenience.

 

John A. Henning

Welding & Materials

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Peyman Hafezi
Sent: Thursday, March 01, 2012 6:18 AM
To: materials-welding@googlegroups.com
Subject: [MW:13799] using E308H-17 instead of E308H-16

 

Dear friends
We have a  WPS for welding 321-SS  base metal with ER 308h+E 308h-16 which is approved by PQR but the matter is non-availability of E308H-16 and we would like to use E308H-17 instead.
There is no mechanical and chemical difference between these two according to ASME Sec II Part C, the only difference is in cover composition that makes -17 better for fillet welds in comparison with -16. But the question remains because our joint is groove and not fillet. What's your opinion? Could -17 be used for groove welding instead of -16 ( without need of a new WPS and PQR) ?

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