Thursday, April 11, 2013

[MW:17347] RE: 17336] Request to provide filler metal & Flux combination for SAW process for low temperature service with Heat treatment

See Below _

 

John A. Henning

Welding & Materials

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Aly
Sent: Wednesday, April 10, 2013 11:25 AM
To: materials-welding@googlegroups.com
Subject: [MW:17336] Request to provide filler metal & Flux combination for SAW process for low temperature service with Heat treatment

 

Dear Experts,

We are going to qualify welding procedure of following details

 

1.       Welding with

·         GTAW with ER70S2

·         SMAW with E7018-1 &

·         SAW

 

2.    Heat treatment after welding at 620°C @ 200min

3.    Impact testing after heat treatment at -46°C

 

Kindly  advise on  filler metal & Flux combination for SAW process to achieve impact properties after heat treatment.  I use the following for impact qualified welding;  ESAB Spool Arc 71 wire and ESAB OK 10.72 flux  - this combination is classified as F7P5-EM14K.   Although the petro-chems have, across the board, heartburn - using a combination with a deposited weld metal  manganese above the Sc .IX  A1 chemistry limit of 1.60% will give you superior impacts after PWHT. 

 

Can F7A8 EM12K  will this serve the purpose…!! Unknown – the combination (whatever it is) is classified only as welded (hence the ”A”) The response of this metal after the PWHT has not been tested.      

 

 

Thanks & regards

 

Ali Mhaskar,

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