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sathyakevin
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Join Date: Feb 2012
Posts: 2

How to Avoid Cracks In Stainless Steel FCAW Welding?

03/12/2012 2:21 PM

hai all,

We have done the Flux Core Arc Welding in stainless steel Gr.321 with E347T0-1 wire, center line crack has occurred on the surface of the welding. What is the root cause of this crack, how can we avoid this?
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chyagon
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Join Date: Mar 2012
Posts: 2
#1

Re: How to Avoid Cracks In Stainless Steel FCAW Welding?

03/13/2012 12:47 AM

It because of too fast of cooling rate made too high residue strain energy.

Preheat the work-piece at 250-300 degree C may help together with heat the welding line immediately after welded to reduce strain energy can protect from crack.
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Jerry Mesthrie
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Join Date: Sep 2011
Posts: 4
Good Answers: 1
#2

Re: How to Avoid Cracks In Stainless Steel FCAW Welding?

03/13/2012 2:26 AM

Pre heat should be at ambient temperature.Very important your maximum interpass temperature is 175 deg C.Slow Cool under insulated blanket.

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Whitephone
Guru

Join Date: Jan 2010
Location: Mineral wells Tx
Posts: 630
Good Answers: 34
#3

Re: How to Avoid Cracks In Stainless Steel FCAW Welding?

03/13/2012 2:36 AM

Thickness?
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pritam
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Engineering Fields - Mechanical Engineering - New Member India - Member - New Member

Join Date: Aug 2008
Location: City of destiny, INDIA
Posts: 775
Good Answers: 67
#4

Re: How to Avoid Cracks In Stainless Steel FCAW Welding?

03/13/2012 3:32 AM

Did you follow WPS?
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