Many fabricators perform gas metal arc welding gmaw of stainless steel with a solid wire.
Welding of stainless steel sheet.
The team programs a mig welding robot to perform the weld and places the workpiece inside.
Using a mig torch on steel.
For mig welding stainless steel a shielding gas mixture that s 90 percent helium 7 5 percent argon and 2 5 percent carbon dioxide is generally ideal.
Wear a full length shirt and.
For thicker base pieces step up to 035 inch to 045 inch welding wire.
Therefore the recommended shielding gas to use for short circuit stainless steel mig welding is a tri mix shielding gas such as 90 he 7 5 ar 2 5 co2.
Gmaw has moderate equipment complexity and operator skill requirements and for stainless steel welding it can be used in pulse or spray transfer mode.
Mig welding is fast and.
Some things that need to be considered include.
With stainless steel welding the issue is compounded by the fact that stainless steel has a more sluggish weld bead as discussed already.
For most jobs welding stainless steel you ll want to use 030 inch diameter stainless steel welding wire.
This is the number one most crucial thing every welder must do before beginning to weld.
How to weld stainless steel method 1 of 3.
The step by step process to weld stainless steel both mig tig welding so now that we have all the pieces in place let s combine them and get the actual job done.
With these materials use a tri mix gas 90 helium 8 argon and 2 co2.
Make sure the fitup is tight with absolutely no gap prop your tig cup right on the joint with the sharp tungsten electrode tip less than 1 16 from the joint set the tig welder to hit it hot and fast when you press the.
Setting the steel in place.
In most cases mig welding stainless steel wire and sheet metal forms is pretty simple for marlin s manufacturing team.
Bracing the joint during welding.
The cost per pound for solid wire is less than other choices but the shielding gas is an added expense.
But in the case of 316l stainless you will need to incorporate a 316l wire.
Use mig welding to join thicker pieces of metal.
Furthermore if you plan to weld stainless steel er308 er308l and er308lsi welding wire are best used.
Most stainless steels are considered to have good weldability and may be welded by several welding processes including the arc welding processes resistance welding electron and laser beam welding friction welding and brazing.
Put on a welding mask and protective clothing.
For these types of materials a tri gas mixture is recommended which consists of 90 helium 8 argon and 2 co2.
To weld sheet metal with solid wires use electrode positive ep or reverse polarity.
At first you need to put on your welding jacket or at least a full sleeve shirt in order to protect your arms and upper body area.
Put on your safety gears.
For any of these processes joint surfaces and any filler metal must be clean.
When welding 304 stainless steel er308 er308l and er308lsi wires are compatible but for welding 316l stainless you need a 316l wire.
