I have some LA flanges certified as F9 grade as per MTC and TPI certificate. But when I conducted PMI using NITON-XRF machine I have observed presence of Vanadium slightly lower than F91 requirements in some of them.
My query is
If it is of F9 why there is Vanadium presence?
Can I accept it as F9 grade?
Thanks
Hrishi
Sent on my BlackBerry® from Vodafone Essar
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