Metrode Ultramet-316NF description: The high nickel and nitrogen levels provide a fully austenitic and non-magnetic weld deposit with maximum magnetic permeability of 1.01. A typical tensile strength above 600MPa is also achieved by means of the controlled level of nitrogen. A high manganese content ensures freedom from micro-fissuring in the ferrite-free weld metal. Applications exploiting non-magnetic properties include welding of 316L fittings for minesweepers and offshore downhole instrumentation collars.