SA-266-Gr.2 Normalized vs. Q. & T.
SA-266-Gr.2 Normalized vs. Q. & T.
(OP)
A vessel is in hydrogen service.
The forging“s material is SA-266-Gr.2 Normalized with test in accordance to NACE-TM284 & NACE-TM0177.
Our supplier is ofering Quenched and Tempered instead of Normalized.
I wold like to know if there are advantages or disadventages using this material in Quenched and Tempered instead of Normalized heat treatment.
Tanks in advance.
The forging“s material is SA-266-Gr.2 Normalized with test in accordance to NACE-TM284 & NACE-TM0177.
Our supplier is ofering Quenched and Tempered instead of Normalized.
I wold like to know if there are advantages or disadventages using this material in Quenched and Tempered instead of Normalized heat treatment.
Tanks in advance.





RE: SA-266-Gr.2 Normalized vs. Q. & T.
Normally, a liquid quench and temper heat treatment is required on material that is of a thickness or geometry to assure meeting thru thickness mechanical property requirements, where a normalization heat treatment may not achieve the required thru thickness mechanical properties.
Advantages of Q&T; a consistent, thru thickness structure that produces more uniform mechanical properties, and increased toughness.
Disadvantage; potential distortion concerns from liquid quenching, increased cost for this heat treatment and more care during welding fabrication to keep heat inputs from adversely affecting the quenched/tempered bulk material properties.