The physical properties of different types of stainless steels are different from each other and this situation plays an important role in the welding process.
The austenitic chromium-nickel stainless steel is one third of that of unalloyed steels. This indicates that the heat will remain in the seam zone for a long time, and it may lead some problems.
Chromium stainless steels generally have the same coefficient of thermal expansion as non-alloy steels. In the austenitic chromium-nickel steels this value is carbonaceous and less alloyed.