Cobalt Alloy Bellows Materials - Bellows Systems

Haynes 25 (UNS: R30605)

Bellows Materials Haynes 25
Description A cobalt based alloy that combines good forming and excellent high temperature properties. The alloy is resistant to oxidation and carburization to 1900 °F (1038 °C).
Application Notes Alloy 25 can only be hardened significantly by cold working. Cold working will increase creep strength up to 1800 °F and stress rupture strength uo to 1500 °F. Strain aging at 700 – 1100 °F improve creep and stress rupture strengths below 1300 °F.
Industry Uses / Products Jet Engine Parts: turbine blades, combustion chambers, after burner parts and turbine rings. Industrial Furnaces: mufflers and turbine rings
UNS R30605
Specifications AMS 5537

Material Properties

Density, ρ, lbs/in^3 0.33
Yield Strength, Sy, Psi 55000
Tensile Strength, Su, Psi 130000

Chemical Compostion, %

Iron, Fe 3
Nickel, Ni 10
Molybdenum, Mo 1
Chromium, Cr 20
Manganese, Mg 1.5
Cobalt 51
Tungsten, T 15