347H/UNS S34709 Stainless Steel Pipe
S34709 features and applications: 347H austenitic stainless steel heat resistant steel with good corrosion resistance, weldability and heat strong performance. 347H stainless steel used in large boiler superheater reheater steam pipes, petrochemical heat exchanger tube.
S34709 chemical composition ①: C C: 0.04 ~ 0.10 Manganese Mn: ≤ 2.00 Si Si: ≤ 0.75 Chromium Cr: 17.0 ~ 19.0 Ni-Ni ②: 9.0 ~ 13.0 P P: ≤ 0.045 S S: ≤ 0.03 Niobium Nb: (8C ~ 1.00)
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