616

High-Temp Steel

616

Co-W Ni-base alloy. (ASTM B637; equiv UNS N06616). Nominal values—confirm mill certificate.

Chemical Composition (%)

CR	20
CO	10
MO	7
W	1.5

Mechanical Properties

Tensile:≥900 MPa;Yield:≥600 MPa

Chinese Standard

ASTM B637 616

Applications

钴钨镍基合金。,Bar

Available Forms

Nickel/cobalt-base superalloy retaining high strength, creep and corrosion resistance at extreme temperature. Cobalt (≈11.5%) 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

UNS N06616

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616