for best welding
To get a good result the welding areas should be properly cleaned of rust,
rust, grease, tinder and similar pollutions.
Preheating to 350-500°C is recommended. The lowest possible currency should be used to avoid the melting of the hard particles.
For Hard-Facing unalloyed and low alloyed stells (cast steel) with a max.
of 0.45 % C, higher C content could lead to cracking.
The selection of the grain size und the rod diameter depend on the
application and the size of the tool to be hard faced.
Lower particle sizes are recommended when the wear from abrasion is
dominant, bigger sizes for fitting a tool for stronger cutting strength.