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	PRODUCT DATA of Rene 41

Material	Rene 41
Product Datasheet	RENE-41_DS_US_EN Haynes R-41
General Information	René 41 is a vacuum-melted precipitation-hardening nickel-base alloy designed for highly stressed parts operating between 650C and 980C. Its applications include after burner parts, turbine castings, wheels, buckets, and high-temperature bolts and fasteners. René 41 is available in the form of sheet, bars, and forgings.
Chemical Composition	Ni-19Cr-11Co-5Fe-4.3Mo-3.1Ti-1.5Si-0.09C-0.006B

	EXPERIENCE IN PRACTICE

Equivalent Designations

HAYNES R-41; Udimet R-41; Pyromet Alloy 4

	PHYSICAL PROPERTIES

Specific Gravity

8.25

	ELASTIC PROPERTIES

Tensile Modulus	218 GPa
Shear Modulus	83.4 GPa
Poisson Ratio	0.31

	THERMAL PROPERTIES

Thermal Conductivity	11.5 W/m.K
Thermal Expansion Coefficient	13.5 μstrain/°C
Melting Range	1320 to 1370 °C
Specific Heat	0.452 J/g.K

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

Stress Corrosion Status	High Resistance to SCC: Table 1 Data Quality: Design Data
Bimetallic Corrosion	Can be connected without any restriction to: 400 series Stainless steel Can be connected in a non-controlled environment to the above and 300 series stainless steel, Ti and Ti-alloys, Cr, Cu, brasses, Cu-Ni, Al-bronzes, Si-bronzes, Can be connected in a clean room environment to above and Ag, SnPb alloys, Sn, Pb, low C steel, Al-Cu alloys, Cd, Au Needs specific measures: All others Test:ECSS-Q-ST-70C Rev.1 Table 5.1 Data Quality: Design Data
Welding	Sound fusion welds are dependent on cleanliness and good joint fit-up. Inert-gas-shielded arc welding with a direct current power supply gives best results. Shielding gas should be used for both the arc and back-up. The weld area should be kept cool by use of copper back-up bars or water-cooled fixtures.