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Up Topic Welding Industry / Technical Discussions / linear slag inclusions
- - By hrezvany (*) Date 09-05-2009 11:21
what's difference between linear slag inclusions and slag inclusion and why it is not possible to find linear slg inclusion by Visual Inspection?
Parent - - By 3.2 Inspector (***) Date 09-05-2009 11:26
Once you know what slag inclusion is, you will have your answer.

3.2
Parent - - By hrezvany (*) Date 09-05-2009 11:30
And what's your opinion about visual inspection test for linear type.
Parent - By 3.2 Inspector (***) Date 09-05-2009 11:34
Slag inclusions is slag trapped between layers of weld metal, caused by insuffiant cleaning/grinding.

3.2
Parent - - By Nandesh Kumar (*) Date 09-05-2009 12:26
Hi,

Since in this world no one has got x-ray eyes, slag inclusion cant be detected by VT......

cwi4361
Parent - - By 3.2 Inspector (***) Date 09-05-2009 12:36
I think you forgot Superman.
Parent - - By jarcher (**) Date 09-05-2009 14:08
I don't think Superman has any inspection credentials :-)
Parent - By 3.2 Inspector (***) Date 09-05-2009 14:14
He can be used (once calibrated) as a remote visual tool :)
Parent - - By CWI555 (*****) Date 09-05-2009 16:33
AWS 3.0
Slag inclusion: A discontinuity consisting of slag entrapped in weld metal or at the weld interface.

ASME B31.1 (07)
slag inclusion: nonmetallic solid material entrapped in weld metal or between weld metal and base metal.
Table 136.4.1 Weld imperfections indicated by various types of examinations
Slag inclusion is listed with Note 2 for Visual
Note (2) Discontinuities are detectable when they are open to the surface.

There are many others, but slag is in fact possible to find on the surface.
A slag inclusion can show up anywhere in the weld, Root, Crown, or in the Fill.

For those open to the surface, no 'superman vision' or calibration of the same is required.
Parent - By Stephan (***) Date 09-05-2009 17:25
Gerald,

most excellent and most professional - as always!

"There are many others, but slag is in fact possible to find on the surface.
A slag inclusion can show up anywhere in the weld, Root, Crown, or in the Fill."

I have tried to find a picture on the www, showing a linear slag inclusion open to the surface, and found it on a German Car Mechanics' website(!).

I would like to embed this picture just as a humble addendum to your excellent response.

Stephan
Up Topic Welding Industry / Technical Discussions / linear slag inclusions

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