RE: [MW:9729] CS to SS welding

Dear Manpreet,

Thanks for your valuable time. Please note we have qualified PQR using Filler 309L only but so many time we are getting more than 22 HRC which is not acceptable as per Nace MR 0175.

With kind regards,

Vinod Kumar Kataria

GM - Operations

Bliss Anand Private Limited,

92B/93B Sector 5

IMT Manesar,Gurgaon,

National Capital Region Delhi.

India .

Phone : +91-124-4366000 (9 Lines)

Mobile Phone : +91-9560199004

Fax : +91-124-2290884

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of manpreet
Sent: Friday, February 04, 2011 3:17 PM
To: materials-welding
Subject: Re: [MW:9727] CS to SS welding

 

Dear Vinod,

When welding Carbon steel to stainless steel, one should avoid formation of martensite by using overalloyed filler metal (309L) which will form Austenite even when cooling, a Preheating and using Temper bead technique would also be helpfull to reduce Hardness,

Consideration must be given to reduce High Dilution by reducing Travel Speed, buttering the joint face, no SAW etc.

Also refer to the Shaeffler Diagram to evaluate what kind of microstructue you would expect, with filler metal E309L, you can expect "Austenite with little ferrite".

Regards
Manpreet Singh



On Fri, 04 Feb 2011 13:18:26 +0530 "Vinod Kataria" wrote
>

Hi,

How to control the hardness for NACE MR 0175 application if we have to use A-105 flanges on SS-316 Chamber as PWHT cannot be done.

With kind regards,

Vinod Kumar Kataria

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