CR4 - Thread: Low Impact Value in Welds

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Sakthitharan Active Contributor Join Date: Aug 2011 Posts: 17	Low Impact Value in Welds 06/15/2012 3:19 AM
	Hi, What could be the reason for getting low impact test values in the FCAW Weld. Please give your comments.
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing. Kettle's on. Posts: 19628 Good Answers: 472	#1 Re: LOW IMPACT VALUE IN WELDS. 06/15/2012 3:27 AM
	Incorrect or insufficient PWHT? __________________ There was a time, not long ago, when people were smarter than their phones... (tips hat to CR4 user Harley.)
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing. Kettle's on. Posts: 19628 Good Answers: 472	#2 Re: LOW IMPACT VALUE IN WELDS. 06/15/2012 4:02 AM
	Guano weld? __________________ There was a time, not long ago, when people were smarter than their phones... (tips hat to CR4 user Harley.)
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing. Kettle's on. Posts: 19628 Good Answers: 472	#3 Re: LOW IMPACT VALUE IN WELDS. 06/15/2012 4:06 AM
	RTFM problem? __________________ There was a time, not long ago, when people were smarter than their phones... (tips hat to CR4 user Harley.)
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing. Kettle's on. Posts: 19628 Good Answers: 472	#4 Re: LOW IMPACT VALUE IN WELDS. 06/15/2012 5:37 AM
	Go on. Do tell. __________________ There was a time, not long ago, when people were smarter than their phones... (tips hat to CR4 user Harley.)
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Nothing is Impossible Power-User Join Date: Mar 2011 Location: Sydney . Australia Posts: 193 Good Answers: 8	#5 Re: Low Impact Value in Welds 06/15/2012 11:18 PM
	what grade material what thickness what class , brand and type of FCAW consumable what was ambient temperature in the environment on the day any preheat or post heat used ? what were the weld parameters used ( arc voltage , wire feed , heat input mm/min ) ? was the consumable oven conditioned before use or was it stored in a cold wet place outdoors as per the American standard A.S-DNGAF
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jmart23 Power-User Join Date: Jun 2006 Posts: 482 Good Answers: 6	#6 Re: Low Impact Value in Welds 06/16/2012 10:23 AM
	Did you do a PQR? Were your results the same? I would guess not or you would have already corrected the problem. Is your WPS being followed? amps, rate of feed, correct preheat, PWHT?I have seen welders swear they were following the correct preheat (rosebud) and did not have torch within fifty feet! Is your welding wire correct, how is it managed, who issues the wire, how is it stored?
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