[MW:17593] RE: 17592] welder is valid

If your weldor is qualifying per ASME Section IX, then the use of alternate base metals is discussed in QW-423.1.  The combination you state below is permissible and weldor is qualified. 

 

According to retired committee member I know, the rational is that weldor is only trying to show the ability to deposit sound weld metal.  The previously performed PQR established that the actual base metal-weld metal combination possessed the required metallurgical properties.  Therefore, the only important issue is that the base metal be sufficiently compatible with the filler metal to allow the weldor qualification coupon to be tested.  

 

John A. Henning

Welding & Materials

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ali.himayat@gmail.com
Sent: Monday, April 29, 2013 11:31 AM
To: materials-welding@googlegroups.com
Subject: [MW:17592] welder is valid

 

whether welder is valid if WQT done on P1 to P1 with ER308 (F6 A5.9), autual welding production WPS is P8-P8 with filler rod ER308.

Please answer.

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