Many laser welds are completed without filler wire because the laser melts the parent material directly, but filler wire can be added to bridge gaps, improve fit-up or add strength — and many handheld laser welders accept automatic wire feeders. Argon is the most common shielding gas, protecting the weld pool from oxidation.
Does laser welding require filler wire?
Not always. Many laser welds are completed without filler wire because the laser melts the parent material directly. However, filler wire may be used where additional material is needed, to bridge gaps or improve joint strength. The decision depends on the joint design, material and application.
Can handheld laser welders use filler wire?
Yes. Many handheld laser welders can be fitted with automatic wire feeders, allowing filler wire to be added during welding. This is useful for wider joints, poor fit-up or applications requiring additional weld reinforcement. Using filler wire also expands the range of applications that handheld laser welders can handle.
What shielding gas is used for laser welding?
Argon is the most common shielding gas for laser welding because it protects the molten weld pool from oxidation. Nitrogen and helium may also be used depending on the material and application. Correct gas selection improves weld quality and surface finish.
What thickness can a handheld laser welder weld?
Material thickness depends on laser power, material type and joint design. Many modern handheld fibre laser welders can weld thin sheet from under 1 mm up to several millimetres thick in a single pass. Always refer to the manufacturer’s specifications for recommended welding capacities.
Choosing the right consumables
The two consumables that most affect laser weld quality are the filler wire (where used) and the shielding gas. Wire choice follows the joint design and material, while gas choice follows the material and the finish you need — argon for most work, with nitrogen or helium where the application calls for it.
If you need help matching filler wire or shielding gas to your material, speak to the Weldability SIF team or browse our wider welding consumables knowledge centre. Weldability SIF supplies HP Fiber handheld laser welders along with the wire feeders, shielding gas and Extractability fume extraction needed to run them.