X2NiCoMoTi18-8-5
High-StrengthX2NiCoMoTi18-8-5
Grade 300 maraging steel, ultra-high strength & toughness. (DIN 17350; equiv AMS 6514 / GB 00Ni18Co9Mo5TiAl). Nominal values—confirm mill certificate.
Chemical Composition (%)
| NI | 18 |
|---|---|
| CO | 8.5 |
| MO | 4.6 |
| TI | 0.55 |
| C | 0.03 |
Mechanical Properties
Tensile (Aged):≥2000 MPa;Yield:≥1940 MPa;Elong:≥8%
Chinese Standard
DIN 17350 X2NiCoMoTi18-8-5
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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