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347 round bar PMI testing

347 stainless steel is an austenitic stainless steel with excellent resistance to intergranular corrosion when exposed to chromium carbide precipitation temperatures ranging from 800 to 1500 degrees Fahrenheit. Alloy 347 with tantalum – tantalum (known as niobium) has good mechanical properties at high temperatures.

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Typically used in the 800-1500¡ãF temperature range, this grade is stabilized by the addition of niobium to stabilize chromium carbide precipitation, which results in niobium carbide precipitation. After exposure to the 800-1500¡ãF temperature range, Type 347 is highly resistant to intergranular corrosion, this grade resists oxidation up to 1500¡ãF, and has higher creep and stress rupture capabilities than 304/304L. In the annealed state, it also has good low temperature toughness and is non-magnetic. At the same time, type 347 is stabilized with columbium and is more suitable for aqueous and low temperature environments due to its good resistance to intergranular corrosion. Both 347 and 321 have good resistance to polythionate stress corrosion cracking encountered in refineries. The high temperature oxidation resistance of 347 is similar to that of 304 stainless steel.

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