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High-Temp Steel

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Age-hardening Ni-base turbine disc alloy. (ASTM B637; equiv UNS N07208). Nominal values—confirm mill certificate.

Chemical Composition (%)

CR	19
CO	9
MO	8
TI	1.85
AL	1.2

Mechanical Properties

Tensile:≥1100 MPa;Yield:≥800 MPa

Chinese Standard

ASTM B637 282

Equivalent Grades

UNS N07208

Applications

时效硬化镍基涡轮盘。,"Plate

Available Forms

Bar"

Uses

Nickel/cobalt-base superalloy retaining high strength, creep and corrosion resistance at extreme temperature. Cobalt (≈10%) raises hot corrosion and wear resistance. Used in gas-turbine blades, aero-engine hot sections, combustors and advanced energy systems.

Heat Treatment

Solution treated 1050–1250 °C and aged (≈700–900 °C) to precipitate γ′/γ″ strengtheners; processed via vacuum induction + VAR/ESR for cleanliness.

Precautions

Machining is difficult — use ceramic/PCBN tools, generous coolant and rigid setups. Keep clean (vacuum/inert melting) to avoid inclusions; avoid contamination by low-melting elements.

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