Avesta 904L-PW description: AVESTA 904L-PW is a highly alloyed fully austenitic Cr-Ni-Mo-Cu electrode designed for welding ASTM 904L and similar types of stainless steel. The electrode has a coating specially designed for position welding. 904L-PW has a fully austenitic structure which makes it somewhat more sensitive to hot cracking than for example 316L. Welding should be performed taking great care about low heat input and interpass temperature.