Lastek 1120

Root runs with radiographic quality

Highly crack resistant due to a very low hydrogen deposit. Recommended for applications where excellent mechanical properties and X-ray controlled joints are required.

Extremely good welding properties in all positions except vertical down.

Special moisture resistant coating.

Specifications & Usage


Medium and heavy mild steel fabrication work under conditions of high restraint and structural steels.

Critical applications requiring toughness at subzero temperatures.

Pipe welding, boiler plates, ship building, and so on.


Weld with a short arc.

Welding of root passes: straight polarity (electrode negative).

Welding of filling passes: reverse polarity (electrode positive).

Always use dry electrodes to obtain the highest possible mechanical characteristics.

If the coating has taken up moisture despite of its special coating, it can be rebaked at 250°C (480 °F) for 2 hours.


Welding proces: Covered electrode (SMAW)
Material Type: Mild steel (unalloyed)
Welding positions: All, except vertical down.
Norm : EN ISO 2560-A
Classification: E 42 4 B 42 H5
Norm: AWS A5.1
Classification: E 7018.1
Minimum packing: 5 kg in a plastic box