Hi Amol,
answering the cold forming intermidiate HT question, it depends on the determined fibre elongation. If your sphere fibre elongation is 5% and less, only cold forming is required before welding and if your fibre elongation is above 5% cold forming and intermidiate HT shall be applied. It is also advised to determine if PWHT is required since you are dealing with critical material (SA 517 Gr. F). I recommend that you consult ASME code to determine the fibre elongation.
On Friday, January 2, 2015 at 10:26:08 AM UTC+2, amol wrote:
-- answering the cold forming intermidiate HT question, it depends on the determined fibre elongation. If your sphere fibre elongation is 5% and less, only cold forming is required before welding and if your fibre elongation is above 5% cold forming and intermidiate HT shall be applied. It is also advised to determine if PWHT is required since you are dealing with critical material (SA 517 Gr. F). I recommend that you consult ASME code to determine the fibre elongation.
On Friday, January 2, 2015 at 10:26:08 AM UTC+2, amol wrote:
we have to make a sphere from crown petal construction.Material SA 517 Gr F. UTS 790-820MPa. cold forming will be done
whether this will require intermediate heat treatment to avoid formation of cracking?
If so when/at which stage of forming it has to be carried out?
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