Is 316SS commercial requirement require UT test ? 1

[katrinali]

Hi Guys,

Not sure if 316ss commercail requirement ask for the UT test ( mostly? ) .. i thought the answer is no, but would like to confirm

Thanks ahead

Kat

 

[denlow60]

Hi Kat,

316 ss is not tested UT because it is austenite's , 316 stainless steel is not magnetic

Denlow .

 

[EdStainless]

What product form and what specification?
This would all be spec driven.

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Plymouth Tube

 

[Ripz]

As EdStainless said, the product material specification would detail the testing requirements.

Denlow...what are you talking about?

 

[wegm]

denlow60,
Please note that "non-magnetic" isn't a restriction to perform UT as it is for MT since UT doesn't require the magnetic properties of a steel.
katrinali,
UT is widely used for austenitic stainless steels like SS 316 even though the austenitic structure makes it difficult to detect discontinuities due to its coarse grain as well as its anisotropic crystal structure that result in attenuation, splitting, dispersion and skewing of the beam. In order to overcome that problem low frequency large size probes and shorter ultrasonic wavelengths shall be used. Please have a look at this link:
UT on austenitic stainless steel (ASS)
regards
wegm

 

[wegm]

katrinali,
Regarding your original query, please let me add that the requirement for UT depends on the applicable code and customer requirements
regards,
wegm

 

[katrinali]

wegm (Industrial)

Thanks a lot !!! this is really helpful : D

Problem solved ~~

Cheers
Kat

 

[denlow60]

wegm's ,

it is good that I know this now, because in the Netherlands , we use RT

Thank you.

Denlow

 

[NX687]

Denlow
Its probably more correct to say that 316 is non magnetic only after annealing

316 in my hand now has an Eclipse magnet 25 Dia x27 long hanging upside down on it

I also have a 316 conflat flange,that does the same

 

[denlow60]

NX687
what I've learned is that only the austenitic stainless steel group is not or very light magnetically.

Denlow