Fillet Welding - Penetration Depth

Not really sure what you are asking, but - the "special method" may be beveling the pieces and then calling it a full penetration weld (not necessarily a fillet weld, unless, for example you place a cover fillet on a full pen T-joint). Please do a little research and then ask a better question.

Dear Sir,

Please refer to the following fillet welding drawing with full depth penetration.

How it is possible to acheive this? My customer is asking for this type T joint?

Hi...

My earlier post refers to exactly these types of welds. Let me know the material & thicknesses involved as well as application. What is the extent of NDT to be done and to what standards?

The bottom plate is of thickness 32 mm,Fe 540B IS 8500 and the other plate is of 16 mm,Fe 410WB IS 2062.I dont know about NDT,i think ultra sonic testing might be done.

Hi...

From your answer I have to assume that the flange is 32mm thick & web is 16mm thick. The material is ordinary semi-killed structural steel.

You still have not informed job length and whether job is straight or curved?

First make a mock-up with a single V angle=65 degree, landwith=1.6mm if you use stick electrodes & 3.15mm incase you are doing a submerged arc weld. Root gap is 1mm. Back-chip grinding will have to be done with a cut-off wheel patiently. Make a few trails runs to get correct current adjustments. you can do both UT or gamma ray to check for complete penetration.

Plenty of amps!

Pick yourself up a machinists handbook.

What is your workpiece?

dinakarj, the others are correct. Much more thought must be given this request. Aluminum, steel, other metal? Dissimilar metals? Dissimilar thicknesses? Underwater? Stick weld, SMAW, GMAW, TIG?

A more useful place to search may be within the publications offered by the American Welding Society (www.aws.org). I believe they will sell you reference books.

Best of luck...

Hi...

Such welds are possible. It was done by me for the structural Steel work at Vizaj Steel Plant in 1985. The designing was of Russian origin whereas the detailing was done by Dustoor & Co of Calcutta. In 12m lg plate girders the T-joints comprised of 20mm / 12mm and 32mm /20mm thickness combinations. Initially we used stick electrodes but later on switched over to submerged arc welds since in this system it was possible to use currents of 600amps which helped complete fusion at the root. The finished T-joints were subjected to Ultra Sonic Examination.

However, a similar condition envisaged for the welding of heavy column sections with their 80mm thick base plates failed because back-chip grinding at the corners wasn't possible properly resulting in slag inclusions.

Are you sure you're a welder?

Your question should better address the issue because otherwise I can only say "crank up your current high enough to burn that rod into the steel like butter to get good fusion!"

As for penetration you should do a good bevel preparation according to the thickness of the material.

Full depth penetration can be achieved by providing root gap between the parent maetal and secondary metal as well as the secondary metal should have end preparation.in this method backup bar is used.

Another one Both metals(parent and secondary) have end preparation and there is no root gap between them .here no backup bar used.

end preparation may be bevel or v- groove depends on the position of metals

Please let me know if you want further details.

Dear Sir,

Try to give me more details on the back up bar method why we are going for that method.

Regards,

Dinakar.J