X3NiCoMoTi18-9-5

High-Strength

X3NiCoMoTi18-9-5

Grade 300 maraging steel, ultra-high strength & toughness. (DIN 17350; equiv AMS 6514 / GB 00Ni18Co9Mo5TiAl). Nominal values—confirm mill certificate.

Chemical Composition (%)

NI18
CO8.5
MO4.6
TI0.55
C0.03

Mechanical Properties

Tensile (Aged):≥2000 MPa;Yield:≥1940 MPa;Elong:≥8%

Chinese Standard

DIN 17350 X3NiCoMoTi18-9-5

Equivalent Standards

AMS 6514

Equivalent Grades

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.

Applications

300级马氏体时效钢，超高强韧。,"Bar

Available Forms

Plate

Uses

Sheet"

Heat Treatment

Nickel/cobalt-base superalloy retaining high strength, creep and corrosion resistance at extreme temperature. Cobalt (≈9%) raises hot corrosion and wear resistance. Used in gas-turbine blades, aero-engine hot sections, combustors and advanced energy systems.

Precautions

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

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