Avesta FCW-2D 347/MVNB description: AVESTA FCW-2D 347/MVNb is used for welding titanium and niobium stabilised steel of type 19 Cr 10 Ni or similar. A stabilised weldment posses improved high temperature properties, e.g. creep resistance, compared to low-carbon non-stabilised materials. FCW 347 is therefore primarily used for applications where service temperatures exceed 400°C.