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Technical Discussions
Slimmoon
Slimmoon
19:44 Oct-22-2009
Impat Testing @ -150 Deg C

Dear

If we are doing impact test V -Notch for 316L @ -196 Deg Centigrade we can use Liquid Nirogen . i want to do impact @ - 150 Deg Centigrade for 316L . How to bring this temperature ..

    
 
 
Roger Duwe
NDT Inspector, API-510, 570, 653
MISTRAS, USA, Joined Jan 2009, 148

Roger Duwe

NDT Inspector, API-510, 570, 653
MISTRAS,
USA,
Joined Jan 2009
148
22:08 Oct-23-2009
Re: Impat Testing @ -150 Deg C
In Reply to Slimmoon at 19:44 Oct-22-2009 (Opening).

Using liquid nitrogen to make a slush bath out of R-12 refrigerant fluid "Freon-12" -- difluoro-dichloromethane will give a stable temperature of -157 degreec C. From the time the nitrogen boils off, until all the frozen R-12 melts, the temperature will hold at -157.

Another option is to find a testing lab with an ultrafreezer to perform the inpact testing [Charpy?] for you. Your specimens are small and light. Airmailing them to a lab is fairly inexpensive.

    
 
 
anjafo79
NDT Inspector
Norway, Joined Aug 2009, 204

anjafo79

NDT Inspector
Norway,
Joined Aug 2009
204
22:48 Oct-23-2009
Re: Impat Testing @ -150 Deg C
In Reply to Slimmoon at 19:44 Oct-22-2009 (Opening).

cant you just use original solution and let it warm up a little ;)

    
 
 

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