Vanadium composition showing in p91

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mithlesh kumar

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Dec 17, 2022, 9:45:23 AM12/17/22
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Dear team,

I have observed vanadium in heat analysis of p91 MTC  , but as per code vanadium is not showing in chemical composition table. Suggest is it acceptable or not if acceptable code reference please.

mithlesh kumar

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Dec 17, 2022, 10:17:13 AM12/17/22
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Kindly read WP22 instead of P91

Vishwas Keskar Welding Manager WELDING

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Dec 18, 2022, 10:13:38 PM12/18/22
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What is the % Vanadium in that MTC ?
It is trace elements not a deliberate addition for Gr 22  unlike Gr 91 where it it MUST in Gr 91 

Regards

Vishwas IWE
International Welding Engineer 

mithlesh kumar

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Dec 18, 2022, 10:24:33 PM12/18/22
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Vandium % is .004

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Kannayeram Gnanapandithan

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Dec 19, 2022, 4:31:56 AM12/19/22
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P/T 91 is CrMov steel
It should have Vanadium  and it is a precipitation hardening elements.

THANKS & BEST REGARDS,
KG.PANDITHAN, BE, IWE,  CSWIP 3.1,
ISO 9712 Level 2 in VT,
ASNT-Level II in PT,MT,RT & UT,
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International Welding Engineer. 
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Vishwas Keskar Welding Manager WELDING

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Dec 19, 2022, 4:32:01 AM12/19/22
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0.004 % V- its trace element  
Not a deliberate addition


mithlesh kumar

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Dec 19, 2022, 10:19:33 PM12/19/22
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Sir please read WP22 instead of P91

james gerald

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Dec 20, 2022, 3:10:14 AM12/20/22
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Gentleman,

SA234 WP22 is for 2.25Cr-1Mo steel

where as P91 is modified 9Cr-1Mo steel with additions of Nb and V which provides higher creep strength at applicable higher temperatures and which differentiates from P9 steel (9Cr-1M0).

See below snap shot

Inline image

Thanks & Regards

J.Gerald Jayakumar




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