Lastek 508

TIG welding of brass and bronze

Filler rod for TIG and oxy-acetylene welding of copper alloys like brass and bronze and for welding of steel.

Lastek 508 can be used for joining and surfacing.

Excellent fluidity and porous free welds, sound and smooth deposit.

No flux needed with oxy-acetylene welding of steel.

After welding no further treatment is required before finish is applied (painting, plating …).

Good colour match with brass (if small joints).

Specifications & Usage


Applying wear and corrosion resistant layers on copper alloys and steel and joining copper, bronze alloys and mild steel.

Resistant to atmospheric influences, sulphite liquor (in paper and sugar production), seawater, vinegar, condensing water, lactic acid, etc.

The deposit has a low coefficient of friction.

Used for flaw repair in castings, cosmetic repairs and machining errors in bronze work pieces (be careful with phosphor bronze containing lead - can cause porosity and cracks).

Recommended for applications in the food industry.

Hardness: 95 - 120 HB // Bonding temperature 900 °C


Clean the base material thoroughly around the joint.

Use short stringer beads and fast welding.

Oxy-acetylene welding: good wetting without using a flux.

Can be cold peened after welding, in order to diminish tensions.


Welding proces: Tig welding (GTAW)
Material Type: Copper (alloys)
Welding positions: NA
Norm : DIN 1733
Classification: E-CuSn-C
Norm: AWS A5.6
Classification: S-CuSn6
Minimum packing: 5 kg in a cardboard box