TP347 stainless steel belongs to the austenitic stainless steel series, with its standard chemical composition primarily consisting of chromium (Cr) and nickel (Ni), along with small additions of niobium (Nb) or titanium (Ti) to stabilize the austenitic structure. Specifically, TP347 stainless steel typically contains 17–19% chromium, 9–12% nickel, while niobium additions are usually kept below 0.75%. This chemical composition design not only endows TP347 stainless steel with excellent corrosion resistance but also prevents intergranular corrosion through niobium addition, enhancing its stability at high temperatures.
In terms of microstructure, the austenitic structure of TP347 stainless steel ensures a good balance between toughness and strength. At elevated temperatures, the austenitic structure maintains superior stability, avoiding embrittlement phenomena that may occur in martensitic stainless steels under high-temperature conditions. Additionally, the addition of niobium promotes the formation of stable carbides, further improving the material's high-temperature strength and creep resistance.
Specification
Size : OD: 1/2"-2000mm WT: 0.59-40mm, Length: 0.5mtr-20mtr
Standard & Grade : ASTM A312,ASME SA312/SA312M Grade 304, 304L, 310S, 316, 316L, 321, 347, 410, 904L, 347H, 316Ti, 317, 317L,
ASTM A312 Gr. 347 Stainless Steel SMLS Pipes, ASTM A358 TP347 Stainless steel EFW pipes /smls Pipes & Tubes, ASTM A358 /A249/ A269/ ASME SA312 TP 347 Stainless steel tubes and Pipes in Welded;
Tubing End: Bevel end, Plain end; Threaded;
Chemical Composition of ASME SA312 347 Steel tube / ASTM A312 347 Stainless Steel tubes:
Mechanical Properties of ASME SA312 347 Steel tube / ASTM A312 347 Stainless Steel tubes:
Grade Specifications of ASME SA312 347 Steel tube / ASTM A312 347 Stainless Steel tubes:
