P91 Material Hardness - CR4 Discussion Thread

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hemant22981 Participant Join Date: Jun 2011 Posts: 2	P91 Material Hardness 06/08/2011 11:18 PM
	I had welded P91 material as per procedure. Consumable E 9018-B9 PWHT cycle heating/cooling rate 80 and soking 730 at 2 hours. But at now my hardness is more than 350 BHN after PWHT. Please tell for what reason this happen.
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Whitephone Guru Join Date: Jan 2010 Location: Mineral wells Tx Posts: 630 Good Answers: 34	#1 Re: P91 MATERIAL HARDNESS 06/09/2011 6:52 AM
	That is, piping, valves........? Which is the thickness?
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hemant22981 Participant Join Date: Jun 2011 Posts: 2	#2 In reply to #1 Re: P91 MATERIAL HARDNESS 06/09/2011 10:44 PM
	sir, this pipe to pipe joint
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Whitephone Guru Join Date: Jan 2010 Location: Mineral wells Tx Posts: 630 Good Answers: 34	#3 Re: P91 Material Hardness 06/13/2011 3:11 AM
	The values that you report are high.Did you had the precaution of blinding both ends during PWHT to avoid air currents inside pipe and can distorting The Treatment?
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