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Austenitic of Iron Alloy at low temperatures
2

Austenitic of Iron Alloy at low temperatures

Austenitic of Iron Alloy at low temperatures

(OP)
Hi please enlighten me on the Iron alloys which have Austenitic structure at low temperatures and which can be produced in metal casting

RE: Austenitic of Iron Alloy at low temperatures

(OP)
Hello TVP, Thank you very much.. I'll look into those documents

RE: Austenitic of Iron Alloy at low temperatures

(OP)
If I have to use casted part for Nozzle in LNG tanks (cryogenics) what material I should chose.. thats my question

RE: Austenitic of Iron Alloy at low temperatures

Materials for LNG storage tanks can vary from 9%Ni to austenitic stainless steel, I would not recommend any cast material for nozzles. You will probably require a fabricated nozzle from rolled and welded plate using either 9%Ni or 3XX stainless steel for cryogenic application. Second, the materials of construction will be limited to whatever standard you are using for the LNG storage tank.

RE: Austenitic of Iron Alloy at low temperatures

I agree, Metengr, you beat me to the post. Cast products for such application a BIG NO !

@craghav, have you experienced a cast part being used for such application?

RE: Austenitic of Iron Alloy at low temperatures

The only cast parts are either internal to the system (non-pressure boundary) or something designed with 50:1 safety factors (like a valve body).
Your governing code with give a short list of material options and rules for fabrication.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Austenitic of Iron Alloy at low temperatures

(OP)
My friend said we could use Nozzle 1/2 SCH Stainless steel... is that not casted part?

RE: Austenitic of Iron Alloy at low temperatures

Not enough information to answer your question. Look at the material specification instead of listening to your friend.

RE: Austenitic of Iron Alloy at low temperatures

craghav, I cannot vouch for your friend's advice, but I will certainly accept the opinions provided here. Look at the existing product and apply your mind.

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