Why Are My MIG Welds So Bad?

Is stick welding stronger than MIG?

Stick welding is slightly stronger and better because of its ability to carry out substantial welding projects.

Stick can also penetrate more than MIG welding.

But the fact is this is not as straightforward as you think..

Can you weld over a bad weld?

It should be remembered that welding over weld metal is actually a very common occurrence. Multi-pass welds after all are manufactured by welding over weld metal! There are also many accepted procedures in which welds overlap. … Another factor to consider is compositional variation between the two welds.

How can I make my MIG weld stronger?

Putting to practice any of these tips is likely to improve the quality and durability of your weld.Clean, Clean, Clean. … Get a Great Ground. … Keep Your Stickout Short. … Use Both Hands. … Listen To Your Welder. … Keep The Arc Up Front. … Match Drive Rolls, Gun Cable Liner, Contact Tip to the Wire Size. … Push or Pull.More items…•

Should you push or pull when MIG welding?

When MIG welding mild steel, you can use either the push or pull technique, but note that pushing usually offers a better view and enables you to better direct wire into the joint.

Why is MIG welding good?

Advantages of MIG welding are: High quality welds can be produced much faster. Since a flux is not used, there is no chance for the entrapment of slag in the weld metal resulting in high quality welds. The gas shield protects the arc so that there is very little loss of alloying elements.

Is MIG welding bad for your health?

. Prolonged exposure to welding fume may cause lung damage and various types of cancer, including lung, larynx and urinary tract. … Health effects from certain fumes may include metal fume fever, stomach ulcers, kidney damage and nervous system damage.

What causes pinholes in welds?

One of the most common reasons for welding pinholes is that your cylinder is almost out of gas. This causes an uneven gas flow to the arc and creates pinholes. If there is a lot of moisture in the air, it can cause water molecules to get trapped in the weld that creates pinholes.

What a bad weld looks like?

Signs of a bad weld include: Underside of weld has insufficient penetration, excessive globules of metal, over-sized weld, undersized welds, undercut, overlap, incomplete fusion, porosity and/or cracking. Excessive grain growth or the presence of hard spots cannot be determined visually.

How do you get rid of old welds?

Typically, you can remove welding through plasma cutting, torch cutting, grinding or circular saws, drills, or oxy-acetylene torches.

What are the disadvantages of MIG welding?

Despite its paybacks, Mig welding has some drawbacks that you should grasp well.Sensitivity to contaminants. … Sensitivity to wind. … Limited positions. … Lack of fusion. … Portability problem. … Open arc process. … Fast cooling rates. … Shielding gas.More items…•

Are MIG welds strong?

70,000 psi tensile strength is as strong or stronger than most steels you will weld. Penetration is another subject in mig bare wire vs stick welding. … For Vertical uphill welding Mig will penetrate just as well as stick if it is set hot enough and the wire stickout is kept short.

What are the disadvantages of being a welder?

Welder Health and Safety One of the major disadvantages of being a welder is that it’s dangerous work. The most common welding processes emit intense radiation across the spectrum, from infrared heat to intense ultraviolet light.

What is the hardest metal to weld?

Stainless steels, because of their high chromium content, tend to behave differently with respect to weldability than other steels. Austenitic grades of stainless steels tend to be the most weldable, but they are especially susceptible to distortion due to their high coefficient of thermal expansion.