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Re: [MW:28209] Minimize concavity of fillet weld in saw welding.

By Materials & Welding
You have not provided details towards, process used, parameters selected
for your 10 mm fillet. If it is GMAW it could be due to amps to voltage
relationship apart from travel speed.  Mostly concavity could be due to
higher voltage to amps used or it could be also due to stick out. Check wire size. 
Think it could be a single layer and if it is 0.80 mm, change it to 1.0/1.2 mm.
Maintain a SO of 15 mm or nearer (extension from contact tip). Check torch
angle for a equal leg length.

If it is SMAW, use 4 mm electrode with two/three layer technique. If it is TIG,
check you filler wire (use 2.40 mm size) and tungsten size. It is not a big issue
and can be solved easily.
Sridhar.


On Thursday, 23 August, 2018, 12:46:39 PM IST, Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:


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increase current and reduce travel speed. 

THANKS & BEST REGARDS,
KG.PANDITHAN, BE, IWE,  CSWIP 3.1,
ASNT-Level II in PT,MT,RT & UT.
International Welding Engineer. 
CONSULTANT-WELDING & QUALITY
Mobile no: +919940739349


On Thu, Aug 23, 2018 at 11:53 AM Neem Lal <neem4u@gmail.com> wrote:
Dear All,

We are doing fillet welding of 10 mm leg length, so throat should be around 7 mm.
But due to concave weld profile we are getting 4 mm  to 6 mm throat.

What are the possible remedies to rectify this.


Regards

Neem Lal
Welding Engineer
HMM INFRA LTD.
AMBALA (HR) 

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