Austenitic SS 347
ALLOY 347 / ALLOY 347H | 1.4550 | X6CRNINB18-10 | SUS 347 / SUS F 347 | S34700 / S34709
Austenitic SS 347 has a similar composition to grade 321 with a slightly improved corrosion resistance. This grade is widely used at elevated temperatures because of their property of retaining strength and corrosion resistance. Carbide precipitation in the grain structure of 347 is curbed during its treatment and welding with the help of columbium-tantalum.
The grade is highly stabilized because of its chemical composition that includes chromium (18%) for general corrosion resistance, nitrogen (11%) for strength at room and elevated temperatures, carbon (0.08%) for ductility and columbium-tantalum for stabilization of carbides at the grain boundary.