Monday, August 2, 2010

[MW:6246] Satbalising (Treatment of SA321H

Dear Friends

Request you to share information

 

We have a material of SA321H

Specification calls for

The plate should be  Solution annealed i.e. Heat to 1040C quench in water after adequate soaking time , and followed by stabilizing treatment like heating to 900-950C with holding for 2 hrs and cool fast need not be quenched in water

 

However This plate  to be tested for IGC  Practice E

 

 

II want to know

i)                    What is the significance of Stabalizing treatment once it is solution annealed  by Water quenching?

ii)                   Why it is recommended to cool by Air ( need not be water quenched)?

iii)                 Why it is in H grade only?

Regards

 

Hegde P.B.

 

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