Components

• HP and IP, High T– Rotor– Diaphram– Blades/Nozzles– Casing/Steam Chest

• LP, High T– Rotor– Diaphram– Blades/nozzles

List of Potential MaterialsHP, 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 FactorsHP 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

Machinabilit

y

•Inconel 617, Inconel 740, Nimonic 263

Phase 2 - Performance RankingRotor and Diaphragm

Material Yield Strength Oxidation x 10 Cost x - 5 Total

Inconel 617 283 8 10.70 309.5

Inconel 740 608 10 10.70 654.5

Nimonic 263 630 6 11.39 633.05

Phase 2 - Performance RankingCasing

Material Yield Strength Oxidation x 5 Cost x - 10 Total

Inconel 617 283 8 10.70 216

Inconel 740 608 10 10.70 551

Nimonic 263 630 6 11.39 546.1

Phase 1 – Disqualifying FactorsHP Components – Blades

WeldabilityN/A •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

Machinabilit

y

•Yes - Inconel 617, Inconel 740, Nimonic 263,Nimonic 105, Nimonic 115, U720, Waspaloy, Haynes 282

•No – U720

Phase 2 - Performance RankingHP Blades

Material Yield Strength Oxidation x 10 Cost x - 10 Total

Inconel 617 283 8 10.70 256

Inconel 740 608 10 10.70 601

Nimonic 263 630 6 11.39 576.1

Nimonic 105 690 x 11.36 576.4

Nimonic 115 690 x 11.36 576.4

Waspaloy 650 5 10.30 597

Haynes 282 614 6 10.35 570

List of Potential MaterialsLP Components

• 304• 316Ti• A286• 253MA

Phase 1 – Disqualifying FactorsLP Components

Weldability(Ti+Al )< 2.5

•Yes – 304, 316Ti, 253MA, A286

•No -

Larson-

Miller Param

eter > ??

•Yes -

•No -

Machinabilit

y