Lastek 256 E

Corrosion and wear at elevated temperatures

Cobalt base welding electrode for hardfacings where maximum resistance to corrosion and wear at red heat (up to 1000 °C (1830 °F)) is required.

Excellent resistance to shocks.

Deposit machinable with hard metal tools.

Good resistance to acetic and nitric acid, and organic chemical products such as: petroleum, plastic, rubber and resins, even molten metals as aluminium and zinc.

Also used in the food and pharmaceutical industry.

Specifications & Usage


Warm cutting tools, metal shear blades, stone breakers, hammers, valves and valve seats of combustion motors, glass cutting tools, shafts and pump bearings, hot working dies and moulds, ...

Hardness: 38-46 HRC

Hot hardness: approx. 31 HRC @ 600 °C (1110 °F)


Remove all rust and dirt.

Sharp edges must be rounded for optimum adhesion.

The arc should be short to avoid too much dilution with the base metal.

On crack sensitive steels, apply a buttering layer with Lastek 9066.


Welding proces: Covered electrode (SMAW)
Material Type: Hard facing
Welding positions: All, except vertical down.
Norm : EN ISO 14700
Classification: E Co2
Norm: AWS A5.13
Classification: E CoCr-A
Minimum packing: 5 kg in a plastic box