ESAB Knowledge centre
The use of duplex stainless steel filler metals to avoid hot cracking in GTAW welding of austenitic stainless steel AISI 316L
By André de Albuquerque Vicente, Peter Aloysius D'silva, Roberto Luiz de Souza, Italo Leonardo dos Santos, Renato Rodrigues de Aguiar, Amilton Barbosa Botelho Junior
Sulfur is an element that is intrinsically and sometimes even deliberately present in stainless steel. It is usually bonded in the form of manganese sulfides, which at low levels can have a significant influence on improving machinability.
By carefully selecting raw materials and optimizing manufacturing conditions the Exaton fluxes have guaranteed as-delivered moisture content from the factory.
The primary tasks of a shielding gas are to protect the weld pool from the influence of the atmosphere, i.e. from oxidation and nitrogen absorption, and to stabilize the electric arc. The choice of shielding gas can also influence the characteristics of the weld penetration profile.
Common problems and causes.
Basicity is commonly used to describe the metallurgical behavior of a welding flux. The basicity index is a ratio between basic and acid compounds (oxides and fluorides) of which the flux is composed.