RE: [MW:5166] Change in welding consumable when impact is required

You can use ER70S-2 without requalification, since you are using a classification which exhibits greater toughness or recommended for lower temperature than the one used during procedure qualification.

QW 404.12 (e) applicable in your case.

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Muhammed Ibrahim
Sent: Thursday, May 13, 2010 9:09 PM
To: materials-welding@googlegroups.com
Subject: [MW:5165] Change in welding consumable when impact is required

Dear Members,

 

Please provide a clarification on the following query.

 

One PQR is qualified with GTAW+SMAW,  ER 70S-3+E7018-1 and impact tested at-46.

 

Impact testing is required for the job at -29 Deg.C. Can I use ER70S-2 instead of ER70S-3 ?.

 

As per ASME Sec.II C, ER 70S-3 supports up to -20 Deg C & ER 70S-2 Supports up to -30 Deg.C.

 

Is QW 404.12 applicable in this change?.

 

Thanks & Regards
Muhammed Ibrahim PK