Haynes® 25 alloy, vacuum investment castings, solution treated, tested at 870°C (1600°F)


Subcategory: Cobalt Base; Metal; Superalloy

Key Words: UNS R30605, AMS 5537, AMS 5759, AMS 5796, AMS 5795

Component   Wt. %
C0.1 
Co51 
Cr20 
FeMax 3 
Mn1.5 
Ni10 
SiMax 0.4 
W15 

Material Notes:
Excellent high-temperature strength with good resistance to oxidizing environments up to 980°C for prolonged exposures and excellent resistance to sulfidation and excellent resistance to metal galling. Applications in the aerospace industry, including parts in military and commercial gas turbine engines.

Data provided by the manufacturer, Haynes International, Inc.

Physical PropertiesMetricEnglishComments
Density9.13 g/cc0.33 lb/in³ at RT

Mechanical Properties
Tensile Strength, Ultimate295 MPa42800 psi 
Tensile Strength, Yield165 MPa23900 psi at 0.2%
Elongation at Break25 %25 % in 5D
Reduction of Area31 %31 % 
Modulus of Elasticity225 GPa32600 ksi RT
Modulus of Elasticity at Elevated Temperature146 GPa21200 ksi 1000°C (1830°F)
Modulus of Elasticity at Elevated Temperature154 GPa22300 ksi 900°C (1650°F)
Modulus of Elasticity at Elevated Temperature163 GPa23600 ksi 800°C (1470°F)
Modulus of Elasticity at Elevated Temperature174 GPa25200 ksi 700°C (1290°F)
Modulus of Elasticity at Elevated Temperature181 GPa26300 ksi 600°C (1110°F)
Modulus of Elasticity at Elevated Temperature188 GPa27300 ksi 500°C (930°F)
Modulus of Elasticity at Elevated Temperature197 GPa28600 ksi 400°C (750°F)
Modulus of Elasticity at Elevated Temperature204 GPa29600 ksi 300°C (570°F)
Modulus of Elasticity at Elevated Temperature214 GPa31000 ksi 200°C (390°F)
Modulus of Elasticity at Elevated Temperature222 GPa32200 ksi 100°C (212°F)
Charpy Impact262 J193 ft-lb at RT, 148 J at -196°C (-320°F), 182 J at -138°C (-216°F), 212 J at -78°C (-108°F), 243 J at -29°C (-20°F), 297 J at 260°C (500°F), 273 J at 540°C (1000°F), 230 J at 650°C (1200°F), 194 J at 760°C (1400°F), 163 J at 870°C (1600°F), 144 J at 980°C (1800°F)

Electrical Properties
Electrical Resistivity8.86e-005 ohm-cm8.86e-005 ohm-cm RT
Electrical Resistivity at Elevated Temperature0.0001011 ohm-cm0.0001011 ohm-cm 900°C (1650°F)
Electrical Resistivity at Elevated Temperature0.0001066 ohm-cm0.0001066 ohm-cm 700°C (1290°F)
Electrical Resistivity at Elevated Temperature0.0001078 ohm-cm0.0001078 ohm-cm 800°C (1470°F)
Electrical Resistivity at Elevated Temperature9.5e-005 ohm-cm9.5e-005 ohm-cm 1000°C (1830°F)

Thermal Properties
CTE, linear 20°C12.3 µm/m-°C6.83 µin/in-°F 25-100°C (77-212°F)
CTE, linear 250°C12.9 µm/m-°C7.17 µin/in-°F 25-200°C (77-390°F)
CTE, linear 500°C13.6 µm/m-°C7.56 µin/in-°F 25-300°C (77-570°F)
CTE, linear 500°C14.3 µm/m-°C7.94 µin/in-°F 25-400°C (77-750°F)
CTE, linear 500°C14.3 µm/m-°C7.94 µin/in-°F 25-500°C (77-930°F)
CTE, linear 1000°C14.6 µm/m-°C8.11 µin/in-°F 25-600°C (77-1110°F)
CTE, linear 1000°C15.1 µm/m-°C8.39 µin/in-°F 25-700°C (77-1290°F)
CTE, linear 1000°C15.8 µm/m-°C8.78 µin/in-°F 25-800°C (77-1440°F)
CTE, linear 1000°C16.5 µm/m-°C9.17 µin/in-°F 25-900°C (77-1650°F)
CTE, linear 1000°C17 µm/m-°C9.44 µin/in-°F 25-1000°C (77-1830°F)
Thermal Conductivity9.4 W/m-K65.2 BTU-in/hr-ft²-°F RT
Thermal Conductivity at Elevated Temperature10.9 W/m-K75.6 BTU-in/hr-ft²-°F 100°C (212°F)
Thermal Conductivity at Elevated Temperature12.9 W/m-K89.5 BTU-in/hr-ft²-°F 200°C (390°F)
Thermal Conductivity at Elevated Temperature14.8 W/m-K103 BTU-in/hr-ft²-°F 300°C (570°F)
Thermal Conductivity at Elevated Temperature16.8 W/m-K117 BTU-in/hr-ft²-°F 400°C (750°F)
Thermal Conductivity at Elevated Temperature18.7 W/m-K130 BTU-in/hr-ft²-°F 500°C (930°F)
Thermal Conductivity at Elevated Temperature20.7 W/m-K144 BTU-in/hr-ft²-°F 600°C (1110°F)
Thermal Conductivity at Elevated Temperature22.6 W/m-K157 BTU-in/hr-ft²-°F 700°C (1290°F)
Thermal Conductivity at Elevated Temperature24.7 W/m-K171 BTU-in/hr-ft²-°F 800°C (1470°F)
Thermal Conductivity at Elevated Temperature26.7 W/m-K185 BTU-in/hr-ft²-°F 900°C (1650°F)
Thermal Conductivity at Elevated Temperature29.2 W/m-K203 BTU-in/hr-ft²-°F 1000°C (1830°F)
Melting Point1330 - 1410 °C2430 - 2570 °F 
Solidus1330 °C2430 °F 
Liquidus1410 °C2570 °F 


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