As suggested by Bazrafshan, All STD specify only minimum Holding Time according to thickness of the parts, but the real Holding time also depends upon Furnace Loading, which is calculated according to manufacturer's experience to achieve mechanical properties, therefore some occasions, you would find that Holding Time is stated as 1 min/mm of max. thickness + 1 hour max.
Hope this would be useful,
Regards
Manpreet Singh
On Sun, 16 Jan 2011 15:07:16 +0530 "Bazrafshan,kazem"
>
Dear Vasu:
As far as I know in All STD Holdingtime has been specified as minimum and you can increase holding time ,I thinkholding time will have negative effectjust on Toughness properties, you know holding time also is supplementary essentialin ASME IX.
Regards
Bazrafshan
From:
>Sent: Saturday, January 15, 2011 6:42 PM
>To: materials-welding@googlegroups.com
>Subject: [MW:9227] P11 SR holding time
Dear All,
>
>
>Pls let me know , In Stress relieving of P11 joints will there be any effectsin properties if we maintain the Holding time more than the specified?
>
>Regards
>
>Vasu
>
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For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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