Austenitic stainless steels are generally easy to weld and do normally not require any preheating or postweld heat treatment.

Highly alloyed austenitic stainless steels – also known as super austenitic grades – generally have good weldability, but the micro segregation of molybdenum reduces the pitting resistance in the weld deposit.

To counter the reduction in pitting resistance, these grades are welded with a nickel-based filler that has been overalloyed with molybdenum.

Super austenitic steels should be welded with a minimum of heating.

The presence of ferrite might influence the corrosion resistance in the ferrite phase in some specific environments as nitric acid.

To rectify this, the use of fully austenitic electrodes and filler are used in some applications, such as the production of urea and acetic acid.

Y.S

(N/MM2)

T.S

(N/MM2)

EL

(%)

Specific Heat

(J/g℃)