Power Generation
RAS Alloy supplies high-temperature nickel alloys for gas turbine hot-section components, ultra-supercritical boiler tubing and industrial power plant hardware.
Typical Alloy Grades
617 / 625 / 718 / X-750 / Nimonic 80A
Ultra-supercritical boiler tubes and headers — Inconel 617
Gas turbine transition ducts and liners — Hastelloy X, Nimonic 75
Steam turbine fasteners and bolting — Inconel X-750, Nimonic 80A
Waste-to-energy incinerator components — Inconel 625, Inconel 601
Heat recovery steam generator tubing — Incoloy 800H, Inconel 625
Applicable Standards
A 700°C USC demonstration plant experienced circumferential cracking in IN617 bo...
A 700°C USC demonstration plant experienced circumferential cracking in IN617 boiler tube butt welds after 8,000 hours.
Weld filler metal had lower aluminum content than base metal, resulting in insufficient gamma-prime strengthening. Creep voids concentrated at the weld fusion line.
IN617 now supplied with matching composition filler and post-weld solution treatment at 1175°C for 30 minutes.