Avesta 904L description: AVESTA 904L is intended for welding Outokumpu 904L and similar but can also be used for constructions in type ASTM 316 where a ferrite-free weld metal is required, such as cryogenic or non-magnetic applications. The impact strength at low temperature is excellent. A fully austenitic structure is more prone to hot or solidification cracking than type ASTM 316 welds, so welding should be performed minimising the heat input, interpass temperature and penetration with parent metal. Welding is best performed using a pulsed arc power source.