[MW:17612] HT cycles for SA965 F321 - reg

Dear Experts/Goswamy sir,

Please suggest the solution annealing HT cycles for SA965 F321 to
achieve 160 - 200BHN.
we were done at 1020 - 1025°C for 30min/", but, it was observed only
130 BHN(equotip) max. & Re HT done at 1035-1040°C for 30mins/" &
observed 125 -140 BHN

Job Thickness : 350 mm & Wt:5.2 Tons.

Also, suggest the how many time can i do the Re-HT for such a
stabilized grades. If 3rd times means, is it necessary to take any
precautionary heat treatment.

Thanks in advance

Thanks & Regards,
Thiyagarajan M
Metallurgical Engineer.

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