Haynes 188(UNS R30188)GH5188(China), KCN22W(France)Plate, sheet, strip, rod, bar, forging. ring
Haynes 188 is a cobalt-based alloy which possesses a unique
combination of properties. It has excellent high temperature
strength and oxidation resistance to 2100°F (1150°C) combined with
good post-aging ductility.
Haynes 188 has average room temperature tensile properties in the
bright annealed condition of 137.2 ksi (946 MPa) ultimate strength,
67.3 ksi (464 MPa) yield strength and 53% elongation. At 1800°F
(980°C) the alloy has ultimate and yield strengths of 35.2 ksi (243
MPa) and 19.0 ksi (131 MPa), respectively, with 59% elongation.
Cryogenic temperatures do not significantly affect the ductility of
alloy 188, but strength levels are increased markedly.
The excellent oxidation resistance of Haynes 188 results from
minute additions of lanthanum, which modifies the protective oxide
scale in such a manner that the oxide becomes extremely tenacious
and retards diffusion when exposed to temperatures through 2100°F
Haynes 188 exhibits good ductility after prolonged exposure at
temperatures of 1200, 1400, and 1600°F (650, 760 and 870°C) for
Because of its excellent strength, ductility and oxidation
resistance, Haynes 188 meets the critical high-temperature material
requirements for gas turbine applications as well as many of those
in the airframe, chemical and nuclear fields. Typical uses are as
transition ducts, combustor cans, spray bars, flame-holders and
afterburner liners in jet engines.
UNS R30188, GH5188(China), KCN22W(France), Alloy188
Manganese 1.25 max
Boron --0.015 max
Iron --3.0 max
AMS 5608, AMS 5772,
Forms of product available at A-one Alloy
Plate, sheet, strip, rod, bar, forging. ring
Available on request
*Haynes is a registered trademark of HaynesInternational, Inc.