Rene 41^* Specification
*Trade name of General Electric Inc.

Rene 41 is an age hardenable nickel base alloy that has very high strength at elevated temperatures, particularly within the range of 650 - 980^oC (1200 - 1800^oF). Required mechanical properties can be tailored by selection of various combinations of cold work and/or heat treatments. Rene 41 also has good oxidation resistance.

Good Mechanical Properties at Elevated Temperatures	Yes
Corrosion Resistant at Ambient Temperatures	No
Corrosion Resistant & Good Mechanical Properties at Elevated Temperatures	No
Oxidation Resistant	Yes
Precipitation Hardenable	Yes

Approximate Chemical Composition
Cr	18 - 20%
Co	12%
Mo	9 - 10.5%
Ti	3.0 - 3.3%
Al	1.4 - 1.6%
Ni	BAL

Properties
DENSITY	8.25 g/cm3	0.298 lb/in3
MELTING POINT	1345 oC	2450 oF
COEFFICIENT OF EXPANSION	13.6 µm/m °C (20 - 100°C)	7.41 x 10-6 in/in °F (70 - 212°F)
MODULUS OF RIGIDITY	83.2 kN/mm2	12067 ksi
MODULUS OF ELASTICITY	218.0 kN/mm2	31619 ksi

CONDITION OF SUPPLY	HEAT TREATMENT (AFTER FORMING)
Annealed	Age harden at 760oC (1400oF) for 16 hours and air cool.
Spring Temper	1. Solution Anneal at 1065ºC (1950ºF) for 4 hours and air cool 2. + Age at 760ºC (1400ºF) for 16 hours and air cool
Spring Temper	Age harden at 760ºC (1400ºF) for 16 hours and air cool

CONDITION	APPROX TENSILE STRENGTH		APPROX SERVICE TEMPERATURE
Annealed	800 - 1100 N/mm2	116 - 159 ksi
Annealed + Aged	1350 - 1550 N/mm2	196 - 225 ksi	up to +550ºC	up to +1020ºF
Spring Temper	1400 - 1800 N/mm2	203 - 261 ksi
Spring Temper + Annealed + Aged	1350 - 1550 N/mm2	196 - 225 ksi	up to +550ºC	up to +1020ºF
Spring Temper + Aged	1600 - 2000 N/mm2	232 - 290 ksi	up to +550ºC	up to +1020ºF