Haynes 25 is a Cobalt-Nickel-Chromium-Tungsten alloy that combines
excellent high temperature strength with good resistance to oxidising
environments up to 980oC (1795oF) for long exposures. It also has
excellent resistance to sulphidation.
 

Applications include:

  • Parts for Gas Turbine Engines and bearings
     
Approximate Chemical Composition
Co 51% max
Cr 20%
W 15%
Ni 10%
Fe 3% max
Mn 1.5%
DENSITY 9.13 g/cm3 0.330 lb/in3
MELTING POINT 1410oC 2570oF
COEFFICIENT OF EXPANSION 12.3 µm/m °C
( 20 - 100°C)		 6.8 x 10-6 in/in °F
( 70 - 212°F)
MODULUS OF RIGIDITY 98 kN/m2 14214 ksi
MODULUS OF ELASTICITY 225 kN/m2 32634 ksi
 
CONDITION OF SUPPLY HEAT TREATMENT (AFTER FORMING)
Annealed/Spring Temper Stress relieve at 400oC - 450oC (750oF - 840oF) for 2 hours and air cool.
 
CONDITION  

APPROX TENSILE STRENGTH

  

APPROX SERVICE TEMPERATURE
Annealed 950-1100 N/mm2 138-159 ksi -200o to +900oC -330o to +1650oF
      (for lightly stressed applications)
Spring Temper 1400-1800 N/mm2 203-261 ksi -200o to +900oC -330o to +1650oF
      (for lightly stressed applications)
 
STANDARDS
ASTM 5976 ASTM F90
 
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Unit 4, Smithies Mill, Smithies Moor Lane, Batley, West Yorkshire WF17 8NS UK
Tel: +44(0) 1384 267514   Fax: +44(0) 1384 263022
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