Avesta 310 description: AVESTA 310 is designed for welding high temperature steels such as ASTM 310S. AVESTA 310 gives a fully austenitic type 26 Cr 21 Ni weld metal and is therefore somewhat more sensitive to hot cracking than 316 type steels. Welding should therefore be performed minimising the heat input, interpass temperature and dilution with parent metal.