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Alloy 347 (UNS S34700) is a columbium stabilized austenitic stainless steel with good general corrosion resistance and somewhat better resistance in strong oxidizing

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Type 347 is designed to have properties similar to type 304 stainless steel, which is the most common grade of austenitic stainless steel. The most notable difference is its ability to resist intergranular corrosion. This resistance to intergranular corrosion makes type 347 particularly well suited for welding applications.

Type 347 is a stabilized austenitic stainless steel similar to type 304 with an addition of Columbium and Tantalum. The columbium serves to produce a stabilized type of stainless steel which is immune to chromium carbide precipitation. This type of grades are thus recommended for parts fabricated by welding which cannot be subsequently annealed ...

Its tensile strength ranges from 90-120 ksi (620-830 MPa). In terms of composition, 347 stainless steel contains a maximum of 0.08% carbon, 17-19% chromium, 9-13% nickel, 2% manganese, 1% silicon, and traces of phosphorus and sulfur. 347 stainless steel is an austenitic chromium-nickel stainless steel that contains columbium …

EN-DIN: 1.4550. Printable PDF: 347 Stainless Steel Alloy Data Sheet. 347 alloys are stabilized stainless steels which offer as their main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). 347 alloys are stabilized by ...

The applicable temperature range of SS347 is from 427°C to 899°C. The SS347 is primarily used for high-temperature gaskets, expansion joints, exhaust manifolds, superheaters & heat exchangers, boilers and chemical piping components, etc. ASTM A213 TP347 seamless pipes, O.D=219mm, W.T=30mm. 1. UNS Designation & International …

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Overview. The alloy also offers good resistance to polythionic acid stress corrosion cracking and is a useful material for use around reactor plants. Type 347 is non-magnetic in the annealed condition and can only be hardened by cold working. The alloy finds use in the oil, gas and chemical sector as well as the nuclear industry.