welding filler metal for SS321

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Himan Nikdin

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Apr 20, 2016, 1:43:27 AM4/20/16
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Dear Experts

Refer to API582 table A-2 proposed filer to weld SS321 to SS321 is E347-XX/ER-347 but some manufacturers such as ESAB propose E/ER-308LSi to this base material (SS321 to SS321) operating temperature is +350 C,
would you please advise in this issue.

Regards,
H.Nikdin

Mohd Siraj

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Apr 20, 2016, 7:27:23 AM4/20/16
to Materials & Welding
Both have no prob but higher temp ER347 is best.

pgoswami

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Apr 20, 2016, 11:05:56 AM4/20/16
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Hi Himan,

 

What’s proposed by ESAB is not correct. Please seethe two attachments showing highlighted texts. S.S 321 is a Titanium stabilized steel. Hence the matching weld metals also  shall be  stabilized.

 

Titanium gets oxidized fast when it’s added through coating.  Hence other stabilizers such as Nb has to be added to the weld puddle to provide the stabilized weld metal as well as provide the high temperature Creep Properties. Thus 347 electrodes/fillers are the only solution.

 

Hope it clears your doubt.

 

Thanks.

 

 

Pradip Goswami, P.Eng,IWE
Independent Welding & Metallurgical Engineering Specialist & Consultant.
Ontario,Canada.
ca.linkedin.com/pub/pradip-goswami/5/985/299

pgos...@quickclic.net

pradip....@gmail.com

 


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Lesson 5 - Welding Filler Metals for Stainless Steels.pdf
When to Use 308L, 309L or 316L Filler Metal.pdf

Himan Nikdin

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Apr 24, 2016, 11:50:11 PM4/24/16
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Dear Pradip

Since the operating temperature is below 400C, I think the E308LSi can be a good choice, Are you agree?

Regards,
Himan

From: pgos...@quickclic.net
To: material...@googlegroups.com
CC: himan....@outlook.com
Subject: RE: 24723] welding filler metal for SS321
Date: Wed, 20 Apr 2016 11:05:35 -0400

pgoswami

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Apr 25, 2016, 12:04:50 AM4/25/16
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What's the process fluid and the design temperature? 

Himan Nikdin

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Apr 27, 2016, 5:45:17 AM4/27/16
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This an Air Cooler, and the operating temperature is +350C.


Date: Mon, 25 Apr 2016 00:04:41 -0400
Subject: Re: [MW:24739] RE: 24723] welding filler metal for SS321
From: pgos...@quickclic.net
To: material...@googlegroups.com
CC: pgos...@quickclic.net

Kannayeram Gnanapandithan

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Apr 27, 2016, 8:42:15 AM4/27/16
to materials-welding
then what is necessity to select SS321

THANKS & BEST REGARDS,
KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,
CONSULTANT-WELDING & QUALITY

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