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Components HP and IP, High T – Rotor – Diaphram – Blades/Nozzles – Casing/Steam Chest LP, High T – Rotor – Diaphram – Blades/nozzles
List of Potential Materials HP, High T, Static and Dynamic Inconel 617 Inconel 625 Inconel 718 Inconel 740 Nimonic 105 Nimonic 115 Nimonic 263 Haynes 230 Haynes 282 U700 U710 U720 Waspaloy ODS-FeCrAl
Phase 1 – Disqualifying Factors HP Components – Rotor and Casing Weldability (Ti+Al )< 2.5 Yes - Inconel 617, Inconel 625, Inconel 718, Haynes 230, Inconel 740, Nimonic 263 No - U700, U710, U720, Waspalloy, Nimonic 105, Nimonic 115, Haynes 282 ODS- FeCrAl Larson-Miller Parameter > 25 Yes - Inconel 617, Inconel 740, Nimonic 263 No - Inconel 625, Inconel 718, Haynes 230 Machinability Inconel 617, Inconel 740, Nimonic 263
Phase 2 - Performance Ranking Rotor and Diaphragm MaterialYield StrengthOxidation x 10Cost x - 5Total Inconel Inconel Nimonic
Phase 2 - Performance Ranking Casing MaterialYield StrengthOxidation x 5Cost x - 10Total Inconel Inconel Nimonic
Phase 1 – Disqualifying Factors HP Components – Blades Weldability N/A Larson-Miller Parameter > 25 Yes - Inconel 617, Inconel 740, Nimonic 263, Nimonic 105, Nimonic 115, U720, Waspaloy, Haynes 282 No - Inconel 625, Inconel 718, Haynes 230 Machinability Yes - Inconel 617, Inconel 740, Nimonic 263,Nimonic 105, Nimonic 115, U720, Waspaloy, Haynes 282 No – U720
Phase 2 - Performance Ranking HP Blades MaterialYield StrengthOxidation x 10Cost x - 10Total Inconel Inconel Nimonic Nimonic x Nimonic x Waspaloy Haynes
List of Potential Materials LP Components Ti A MA
Phase 1 – Disqualifying Factors LP Components Weldability (Ti+Al )< 2.5 Yes – 304, 316Ti, 253MA, A286 No - Larson-Miller Parameter > ?? Yes - No - Machinability
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