TP347HFG

<Features>
(a) Fine-grained microstructure by Thermo-Mechanical Process, which contribute to
     superior steam oxidation resistance to conventional coarse-grained 347H.
(b) Weldability is equivalent to 347H and matching welding consumable is available.
(c) Good phase stability proven by long term creep-rapture tests and actual uses.

<Equivalent steel grade, chemical compositions>

• ASTM A213 TP347HFG, ASME TP347HFG
• 18Cr-12Ni-0.6Nb