Poor Welding and the Colours formed on the surface
Poor Welding and the Colours formed on the surface
(OP)
Hi All,
I have posted something similar under the section "material and metallurgy engineering", titled: Welding Issue.
As far as concern, the comments were beneficial, stating that the welding was lacking of fusion and penetration (see attached).
However, I have another concern. Does corrosion play a part in the welding failure? In the picture, the corrosion came in different colours (light brown, dark brown). Any indication? In addition, from the surface, could anyone be identified whether the surface was overheated, or it is purely corrosion?
Background:
1. Supporting bracket, that is able to hold the weight of 100 kg.
2. The supporting bracket is made of mild steel, corner joints at 49 degree
3. It was dipped coat with hot galvanising zinc.
Thanks.
I have posted something similar under the section "material and metallurgy engineering", titled: Welding Issue.
As far as concern, the comments were beneficial, stating that the welding was lacking of fusion and penetration (see attached).
However, I have another concern. Does corrosion play a part in the welding failure? In the picture, the corrosion came in different colours (light brown, dark brown). Any indication? In addition, from the surface, could anyone be identified whether the surface was overheated, or it is purely corrosion?
Background:
1. Supporting bracket, that is able to hold the weight of 100 kg.
2. The supporting bracket is made of mild steel, corner joints at 49 degree
3. It was dipped coat with hot galvanising zinc.
Thanks.





RE: Poor Welding and the Colours formed on the surface
RE: Poor Welding and the Colours formed on the surface
1) What welds were required by the design drawing?
2) Were the joints prepared in manner specified by the fabrication drawings?
3) Was the welding process specified or left to the welder's discretion?
4) Was the appropriate filler metal specified?
5) Was there an approved WPS for the welder to follow?
6) How long was the bracket in service?
7) Did it carry the load required by the design or did it fail due to an overload?
8) Was the welder qualified and certified by the employer?
9) I'm not sure what is meant by "corner joint at 49 degrees"?
10) Can you provide a sketch of what was specified by the fabrication drawings?
As I said, just a few questions before casting accusations about the welds.
Best regards - Al
RE: Poor Welding and the Colours formed on the surface
I recently came across a modified trailer stinger that failed with a 390 lb motorcycle scooter attached to it. It's scary that a hitch & tow rv business would weld this (see attached pix).
Robert
RE: Poor Welding and the Colours formed on the surface
RE: Poor Welding and the Colours formed on the surface
Can you say, "Incomplete Fusion?"
I miss Mr. Rogers.
Best regards - Al
RE: Poor Welding and the Colours formed on the surface
RE: Poor Welding and the Colours formed on the surface
Probably learn to design connections and weld on a lonely nigh while surfing the internet.
Best regards - Al
RE: Poor Welding and the Colours formed on the surface
RE: Poor Welding and the Colours formed on the surface
Guess I learn new hings every day!
RE: Poor Welding and the Colours formed on the surface
I see some evidence of a "weld" on the inside corner, and the third pic shows something on the two sides, but I can't really make out what it is.
http://www.fusionpoint.be
http://be.linkedin.com/in/fusionpoint
RE: Poor Welding and the Colours formed on the surface
One side of one joint exhibited complete penetration because it had a root gap. I used a pencil eraser tip to point at the root area.
Robert
RE: Poor Welding and the Colours formed on the surface
http://www.fusionpoint.be
http://be.linkedin.com/in/fusionpoint
RE: Poor Welding and the Colours formed on the surface
We try to step in before Darwin does.
Best regards - Al
RE: Poor Welding and the Colours formed on the surface
RE: Poor Welding and the Colours formed on the surface
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."