Avesta P5-4D description: AVESTA P5-4D is a molybdenum-alloyed electrode of the 309LMo type, which is primarily designed for surfacing low-alloy steels and for joining stainless and low-alloy steels (dissimilar joints). When used for surfacing, the composition obtained is more or less equal to that of ASTM 316 from the very first run.