Waspaloy^* Specification
*Trade name of United Technologies Corporation

This age hardenable nickel base super alloy has very good strength in temperatures up to about 980^oC (1800^oF). It's strength is generally comparable to that of Rene 41 and is generally superior to that of Alloy 718 at temperatures exceeding 650 - 705^oC (1200 - 1300^oF).

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

Approximate Chemical Composition
Ni	BAL
Co	13.5%
Fe	2% max
Cr	19%
Mo	4.3%
Al	1.5%
Ti	3%

Properties
DENSITY	8.16 g/cm3	0.295 lb/in3
MELTING POINT	1330 oC	2425 oF
COEFFICIENT OF EXPANSION	12.2 µm/m °C (21 - 93°C)	6.8 x 10-6 in/in °F (70 - 200°F)
MODULUS OF RIGIDITY	81 kN/mm2	11750 ksi
MODULUS OF ELASTICITY	211.0 kN/mm2	30600 ksi

CONDITION OF SUPPLY	HEAT TREATMENT (AFTER FORMING)
Solution Annealed	1)  Stabilize at 843ºC (1550ºF) for 4 hours and air cool.      and 2)  Age harden at 760ºC (1400ºF) for 16 hours and air cool.
Spring Temper	1)  Anneal at 1050ºC (1920ºF) for 4 hours and air cool.      and 2)  Stabilize at 843ºC (1550ºF) for 24 hours and air cool.      and 3)  Age harden at 760ºC (1400ºF) for 16 hours and air cool.

CONDITION	APPROX TENSILE STRENGTH		APPROX SERVICE TEMPERATURE
Solution Annealed	800 - 1100 N/mm2	116 - 159 ksi	up to +550ºC Depending on spring design and operating conditions	up to +1020ºF Depending on spring design and operating conditions
Solution Annealed + Aged	1300 - 1500 N/mm2	189 - 218 ksi
Spring Temper	1300 - 1600 N/mm2	189 - 232 ksi
Spring Temper + Annealed + Aged	1300 - 1500 N/mm2	189 - 218 ksi