Skip to Main Content
Canadian
Canadian owned and operated

0780.25K - Selectarc 780 Magnesium TIG Filler Rod 2.5mm - 1kg

Packaging: 1 kg pak
$718.60/kg

Usually ships within 3-5 business days

OVERVIEW

Professional Grade Magnesium TIG Filler Metal

Elevate your welding capabilities with the Magnesium 780 TIG Rod, a premium consumable designed for the precision welding of magnesium alloys. This 1 kg package of 2.5mm (3/32") cut lengths is manufactured to strict standards to ensure consistent chemistry and diameter, which are vital for manual TIG applications. Magnesium welding requires a filler metal that flows smoothly and fuses readily with the base material without introducing contaminants, and the 780 series delivers exactly that.

Welding magnesium requires specific techniques, typically involving Alternating Current (AC) with a high-frequency start to break up the surface oxide layer. The Magnesium 780 rod is optimized for this process, offering excellent bead appearance and color match. It is formulated to resist hot cracking and porosity, two of the most significant defects encountered when welding magnesium castings. The 2.5mm diameter is versatile enough for both thin-wall tubing and thicker casting repairs, giving the welder control over heat input and fill rate.

Technical Performance

The metallurgical composition of the Magnesium 780 rod ensures high tensile strength and good corrosion resistance in the finished weld. It is compatible with a wide range of magnesium-aluminum-zinc (AZ series) alloys. Proper storage is crucial for magnesium consumables; these rods come in a sealed tube to prevent oxidation and contamination prior to use. For best results, always ensure the base material is mechanically cleaned to remove all oxides, paint, and grease before striking an arc.

Features & Benefits

  • Stable Arc Characteristics: Formulated to run smoothly under 100% Argon shielding gas.
  • Crack Resistance: High ductility helps absorb residual stresses during cooling.
  • Versatile Alloy Match: Suitable for joining dissimilar magnesium grades found in industrial applications.
  • Clean Surface Finish: Manufactured to minimize surface impurities that could lead to weld defects.
Additional Information
Brand:N/A
Diameter:2.5mm (3/32")
Weld Process:TIG (GTAW)
Packaging:1 kg Tube
Material Composition:Magnesium Alloy
Rod Type:TIG Cut Length
Shielding Gas Requirement:100% Argon, Argon/Helium Mix
Applications:Magnesium Castings, Automotive Components, Aerospace
Packaging Type:1kg Tube
Packaging Description:1 kg pak
Grade:Silicon Bronze
Position:N/A
Polarity:N/A

INCLUDED

  • 1 kg Tube of Magnesium 780 TIG Rods (2.5mm diameter)
  • Plastic storage tube

APPLICATIONS

  • Repair of magnesium engine blocks and gearboxes
  • Welding of magnesium alloy wheels and rims
  • Aerospace component fabrication
  • Restoration of vintage power tool casings
  • Prototype development using magnesium plates and extrusions

FAQ

You should use 100% pure Argon or an Argon/Helium mix for thicker sections. Never use CO2 or Oxygen mixes as magnesium is highly reactive.

Alternating Current (AC) is required for TIG welding magnesium to provide the necessary cleaning action to break up the surface oxide layer.

Yes, absolutely. Magnesium forms a heavy oxide layer that must be removed mechanically (stainless steel wire brush or scraping) and chemically (acetone) immediately before welding.

No, this rod is specifically for magnesium. Magnesium and aluminum are different metals and require their own specific filler alloys.

These rods are 2.5mm in diameter, which is approximately 3/32 of an inch.

Yes, pre-heating is often recommended for thick magnesium castings to reduce thermal shock and prevent cracking during the welding process.

Store them in a cool, dry place inside their original container. Moisture and humidity can cause oxidation on the rod surface, leading to weld porosity.