Lastek 90

High strength - soft arc

Exceptional mechanical characteristics.

Recommended for all steels that are difficult to weld.

Highly alloyed with Ni, Cr and Mn.

The deposited material is very tough, crack-free, and has an exceptional resistance to shocks and fatigue.

Good resistance to wear, corrosion and heat.

Very soft arc, with minimum spatter and no undercut.

Specifications & Usage


Wear plates for waste disposal, teeth of dredger buckets.

Repair of cracked buckets and scoops.

Repair of tractor-platforms, rear axle and fellies of trucks, leaf springs, broken crank shafts.

Base layer for surfacings on problem steels.

Repair of broken cutting tools.

Wear-resistant surfacing of machine parts e.g. plastic injection moulds.

Hardness: 220 HB


Use a short arc, electrode position almost 90° to the workpiece.

Allow each weld bead to cool slightly before making a further deposit.

For welding on crack sensitive steels, pre-heat the work piece until it reaches the tempering temperature of the steel.

Avoid rapid cooling.

12-14% Manganese steel is always welded cold (max 350 ° C).


Welding proces: Covered electrode (SMAW)
Material Type: High alloyed steel
Welding positions: All, except vertical down.
Norm : EN ISO 3581-A
Classification: E 29 9 R12
Norm: AWS A5.4
Classification: E 312-16
Minimum packing: 5 kg in a plastic box