Maximum thickness of the job which can be tested in UT for Castings/Forgings

[JOSE SEBASTIAN]

Dear Friends,

Please tell me about the maximum thickness of the job which we can test using ultrasonic testing.
Which machine and which method we are using for this.
Please send me the page of the text book where the maximum thickness is mentioned.

Regards,
Jose Sebastian
+919687660525

[sevak hiren]

UT can be done up to 200 inch of job thk. depending of penetrating ability of the material. It is a sentence from AWS - CWI exam course module/book.

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[SV Swamy]

In practice, it is very difficult to test that sort of thickness. Most of the shop floor instruments used for UT don't have that sort of power. Also, such thicknesses need very low frequencies (may be 100 - 200 KHz) and those probes are also not easy to get. 

With the normal instruments and probes, I would expect about 30 - 40 inches in carbon steel to be a meaningful range for testing. For stainless steels and castings, it would be still less. 

Swamy

Retd. QC/QA Metallurgist who held ASNT Level III certificate in UT and RT

[kannayeram gnanapandithan]

Is it possible to carry out UT on ASS 304/309 

Pandithan

[SV Swamy]

Yes. We have tested AISI 304, 316, 310S etc. The sensitivity that we can get (size of a FBH or SDH or  a notch that can be detected) may be a little bigger than those in Carbon Steel. But we have tested forged rounds, plates, slabs etc. 

Castings could be difficult. If you give specific data, I can comment better.

Regards

Swamy

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[prem nautiyal]

YES.

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From: kannayeram gnanapandithan <kgpan...@gmail.com>
To: materials-welding <material...@googlegroups.com>
Sent: Monday, July 29, 2013 4:56 PM
Subject: Re: [MW:18286] Maximum thickness of the job which can be tested in UT for Castings/Forgings