Hot Forming

Dear All Members,

I want to design C/S + S/Sclad Vessel (SA 516 Gr. 70N + SS 316L). when calculated, 2:1 ellipse head have >5% of fiber elongation. As per ASME UCS-79, this head required stress relief but according to our client spec, stress relief should be replace with Normalising. In this regard, i think want to perform head by using hot forming. After check with supplier, they said temperature for hot forming not reach normalising temperature.

So, i need to do normalising treatment again to reduce fiber elongation? Matl can be with this temperature>

Could anyone advice us regarding this matter.

Thank you.