Question

which welding is more strong MIG or TIG

Answer 1

I've heard that both have their own strengths and weaknesses and that it just depends a lot on what you're welding. I referenced a source for some pros and cons of both types of welding. Here they are:

Definition of TIG Welding

Tungsten Inert Gas (TIG) welding joins reactive metals using a non-consumable Tungsten electrode. Inert gas, commonly Argon, is released at the same time as the electrodes to produce a weld without air contaminants. Tungsten is not the filler, it just creates the arc between the electrode and metal, but a filler may be used if needed.

Benefits of TIG Welding:

Cleaner - Using Tungsten to provide its electrical current, TIG welding decreases the amount of sparks, smoke and fumes produced.
Precision - TIG welding has less contamination in its weld, providing more precise and higher quality welds.
Autogenous Welds - These welds do not require a filler material to be used. TIG welding can create a weld by melting one part to the other. Autogenous welds are most commonly used when welding thinner materials.
Disadvantages of TIG Welding:

Setup - TIG welding requires more setup time and is not as user-friendly.
Price - These welds tend to be more expensive and take longer than MIG welding, especially in thicker metals.
Complexity - TIG welding is more complex and requires more skill than the MIG welding process.
Definition of MIG Welding

Metal Inert Gas (MIG) welding combines two metals by using a filler wire with a current to produce the electrode. Inert gas is also used simultaneously to protect the weld from any air contaminants.

Benefits of MIG Welding:

Quick - MIG welding is known for its quickness in producing welds.
User-Friendly - These welds tend to be more forgiving and are easier to make. Setup takes less time and is easy to automate.
Price - Equipment is more accessible and costs less for MIG welding.
Disadvantages of MIG Welding:

Reliability - Less stable arc, some irregular wire feedback and burnback can occur with MIG welding.
Dirtier - More sparks, fumes and smoke are produced during this welding process.


Source: http://www.used-robots.com/articles.php?tag=2986

Answer 2

Thanks Mr. Linalynne for your answer..........I have one more question...How to weld Mild steel with galvanized iron or stainless steel ?

Answer 3

Haha it's actually Ms. Linalynne :]

I'm not too familiar with welding but I think you can use TIG with a stainless steel rod. You can buy Magna Industrial's magna 303 welding rod. I hear it's good for welding stainless steel with mild steel.