W2Mo9Cr4VCo8

Other

W2Mo9Cr4VCo8

Tungsten-type high-speed steel (T1 class). (GB/T 9943; equiv GB W18Cr4V / ASTM T1 / JIS SKH2). Nominal values—confirm mill certificate.

Chemical Composition (%)

C1.05
W1.15
MO9
CR3.5
V0.95
CO7.75
P0.03
S0.03

Mechanical Properties

Hardness(annealed):≤269 HB;Hardness(hardened):66-70 HRC

Chinese Standard

T 9943 W2Mo9Cr4VCo8

Equivalent Standards

ASTM T1

Applications

钨系高速钢（同T1）。,Bar

Available Forms

Nickel/cobalt-base superalloy retaining high strength, creep and corrosion resistance at extreme temperature. Cobalt (≈8.25%) raises hot corrosion and wear resistance. Used in gas-turbine blades, aero-engine hot sections, combustors and advanced energy systems.

Uses

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

Heat Treatment

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.

Precautions

GB W18Cr4V / JIS SKH2

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