Haynes Multimet alloy, 1.6 mm thick sheet, 1177C heat treatment, rapid air cooled, tested at 1149C (2100F)


Subcategory: Iron Base; Metal; Superalloy

Key Words: AMS 5794, UNS R30155, AMS 5532, AMS 5768, AMS 5769, AMS 5795

Component   Wt. %
C0.08 - 0.16 
Cb + Ta0.75 - 1.25 
Co18.5 - 21 
Cr20 - 22.5 
Component   Wt. %
Fe33 
Mn1 - 2 
Mo2.5 - 3.5 
N 0.1 - 0.2 
Component   Wt. %
Ni19 - 21 
SiMax 1 
W2 - 3 

Material Notes:
Iron (Fe) content to balance. Recommended for use in applications involving high stress at temperatures up to 816C (1500F), and moderate stresses up to 1093C (2000F). Excellent oxidation resistance, good ductility, and is readily fabricated. Current applications include aircraft, including tailpipes and tailcones, afterburner parts, exhaust manifolds, combustion chambers, turbine blades, buckets and nozzles. Excellent service for high temperature bolts.

Data provided by the manufacturer, Haynes International, Inc.

Physical PropertiesMetricEnglishComments
Density8.2 g/cc0.296 lb/in at 22C (71.6F)

Mechanical Properties
Hardness, Brinell159159 Converted from Rockwell B hardness.
Hardness, Knoop176176 Converted from Rockwell B hardness.
Hardness, Rockwell B9292 
Hardness, Vickers201201 Converted from Rockwell B hardness.
Tensile Strength, Ultimate48 MPa6960 psi 
Tensile Strength, Yield30 MPa4350 psi at 0.2% offset
Elongation at Break36 %36 % in 50.8 mm
Poisson's Ratio0.2980.298 RT
Poisson's Ratio0.3190.319 -78C
Poissons Ratio at Elevated Temperature0.3150.315 426C
Poissons Ratio at Elevated Temperature0.3250.325 650C
Poissons Ratio at Elevated Temperature0.3390.339 816C

Electrical Properties
Electrical Resistivity9.3e-005 ohm-cm9.3e-005 ohm-cm 22C (71.6F)

Thermal Properties
CTE, linear 250C15.3 m/m-C8.5 in/in-F 23-300C (73.4-570F)
CTE, linear 250C15.6 m/m-C8.67 in/in-F 23-400C (73.4-750F)
CTE, linear 500C16 m/m-C8.89 in/in-F 23-500C (73.4-930F)
CTE, linear 500C16.7 m/m-C9.28 in/in-F 23-600C (73.4-1110F)
CTE, linear 500C17.2 m/m-C9.56 in/in-F 23-700C (73.4-1290F)
CTE, linear 500C17.5 m/m-C9.72 in/in-F 23-800C (73.4-1470F)
CTE, linear 500C17.8 m/m-C9.89 in/in-F 23-900C (73.4-1650F)
CTE, linear 1000C17.8 m/m-C9.89 in/in-F 23-1000C (73.4-1830F)
CTE, linear 1000C18.4 m/m-C10.2 in/in-F 23-1100C (73.4-2010F)
Specific Heat Capacity0.435 J/g-C0.104 BTU/lb-F 21-100C (69.8-212F)
Thermal Conductivity at Elevated Temperature15.9 W/m-K110 BTU-in/hr-ft-F 300C (570F)
Thermal Conductivity at Elevated Temperature17.3 W/m-K120 BTU-in/hr-ft-F 400C (750F)
Thermal Conductivity at Elevated Temperature18.6 W/m-K129 BTU-in/hr-ft-F 500C (930F)
Thermal Conductivity at Elevated Temperature20 W/m-K139 BTU-in/hr-ft-F 600C (1110F)
Thermal Conductivity at Elevated Temperature20 W/m-K139 BTU-in/hr-ft-F 200C (390F)
Melting Point1288 - 1354 C2350 - 2470 F 
Solidus1288 C2350 F 
Liquidus1354 C2470 F 

Optical Properties
Emissivity (0-1)0.880.88 at 1090C (1995F) (oxidized)


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