Lastek 809

For welding dissimilar metals and different stainless steel types

This molybdenum bearing stainless steel alloy, is especially suitable for joining all difficult to weld steels to themselves or to stainless steel, or for joining dissimilar stainless steels. The addition of Molybdenum provides higher corrosion resistance, higher strength and creep resistance at elevated temperatures. When welding low and unalloyed steels, a weld good with a high corrosion resistance is already obtained in the first layer.

The deposited metal is resistant to hot cracking and is practically spatter and porosity free.

Slag release is excellent, and weld pool control is easy to obtain.

The welded deposit is heat resistant up to 1.050°C. (1.922°F).

Specifications & Usage


Joining of dissimilar steels.

Welding of plated steels.

For salt water and pit type corrosive applications.

Welding of CrNiMo stainless steels.

Chemical, petrochemical and food industry applications.

Underlayer for stainless steel coatings.

Do not use on applications which are continuously submitted to temperatures between 600 and 900°C.


Weld with low heat input.

Preheat crack sensitive steels.

Use a stainless steel chipping hammer and brush.


Welding proces: Covered electrode (SMAW)
Material Type: Stainless steel / High alloyed steel
Welding positions: All, except vertical down.
Norm : EN ISO 3581-A
Classification: E 23 12 2 L R12
Norm: AWS A5.4
Classification: E 309MoL-16
Minimum packing: 5 kg in a plastic box