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Normalizing SA 516-70

Normalizing SA 516-70

Normalizing SA 516-70

(OP)
I'm arranging to have some 2 7/8" thick plate normalized at a local heat treater.  I've specified it to be held at 1650 F +/- 25F, held for three hours and cooled in still air.  Will that cover it?

RE: Normalizing SA 516-70

weldtek;
Yes. Make sure it is held for 3 hours at temperature, and ask for furnace strip charts to assure a normalized heat treatment.

RE: Normalizing SA 516-70

(OP)
metengr,
I've asked for a chart and certs.  Your help is appreciated.
Regards,

RE: Normalizing SA 516-70

(OP)
One more question, in your opinion, would it be a mistake to have this material cut to the exact size prior to the normalizing operation?  I am aware it will be out of flat, after heat treating but I'm going to roll it, so that's not an issue, however is shrinkage likely?

RE: Normalizing SA 516-70

Personally, I don't like to work with exact sizes especially if a component will be subjected to re-heat treatment. Leave a little material for trimming after roll forming to match the contour of the vessel, and for improved fit-up.  To answer your question - this heat treatment should not result in any appreciable changes to dimensions (volume) other than flatness, as you described.

RE: Normalizing SA 516-70

(OP)
metengr,
Once again, thanks.  I've also spoken to the technical person at the heat treater, and, he concurs, that any dimensional changes will be minimal, and, he thinks that if anything, it may grow slightly.

RE: Normalizing SA 516-70

weldtek;
Have you been or are planning to attend ASME Boiler Code meetings?

RE: Normalizing SA 516-70

(OP)
I'm certainly interested, but have not investigated the possibility as yet.   

RE: Normalizing SA 516-70

Next meeting is August 8-10, 2005 in Los Angles, CA
Wilshire Grand Hotel.

RE: Normalizing SA 516-70

(OP)
metengr,
Thanks for the headsup.  I'm especially interested in ASME Sec VIII, & Sec IX.  Will the meeting in August pertain to those sections?

RE: Normalizing SA 516-70

weldtek;
Yes, during boiler code week, most of the pertinent ASME B&PV code subgroups (Sections VIII and IX)and subcommittees meet. The code meetings are scheduled four times a year.

Side note, the NBIC subcommittee and main committee meets the following week (August 15-18).

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