WASPALOY®

WASPALOY®

Waspaloy® is an age hardening nickel base superalloy with useful strength at temperatures up to 1400-1600°F, and good oxidation resistance in gas turbine engine atmospheres up to 1600°F. The creep-rupture strength of Waspaloy is superior to that of alloy 718 at temperatures above 1150-1200°F. Short time hot tensile strength is inferior to alloy 718 at temperatures up to 1350°F.

Welding is difficult, and best performed on material in the solution annealed condition. Limit currents and the size of the fusion zone. Rapid cooling from welding is necessary to minimize aging stresses. Copper backup bars or water cooled fixtures are desirable. After welding, the fabrication should be solution treated, using rapid heating and cooling rates through the aging range. Follow anneal by stabilization and aging treatments.

A typical heat treatment is a solution heat teat at 1825°F for 2 hours, air cool. Stabilize heat treat at 1550°F for 4 hours, air cool. Precipitation heat treat at 1400°F for 16 hours, air cool.

Chemistry

 CrNiMoCoAlTiBCZrFeMnSiPSCu
MIN 18.00 -- 3.50 12.00 1.20 2.75 0.003 0.02 0.02 -- -- -- -- -- --
MAX 21.00 Balance 5.00 15.00 1.60 3.25 0.01 0.10 0.08 2.00 0.10 0.15 0.015 0.015 0.10

Specifications

AMS 5544, AMS 5708, AMS 5828
EN 2.4654
UNS N07001
Werkstoff 2.4654

Inventory

WASPALOY® Sheet, WASPALOY® Welding Products

Common Trade Names

WASPALOY®

Features

  • High strength
  • Oxidation resistant to 1750°F

Applications

  • Shafts
  • Fasteners

Physical Properties

Density: 0.296 lb/in3
Melting Range: 2425 - 2475°F

Temperature, °F 400 1000 1200 1400 1600 1800
Coefficient* of Thermal Expansion,
in/in°F x 10-6
7.0 7.8 8.1 8.4 8.9 9.7
Thermal Conductivity
Btu • ft/ft2 • hr • °F
7.3 10.4 11.6 12.7 13.9 -
Modulus of Elasticity Dynamic,
psi x 106
30 27 26 24 23 21

* 70°F to indicated temperature.

Mechanical Properties

Representative Tensile Properties Heat Treated, Sheet

Temperature, °F 70 1200 1400 1600
Ultimate Tensile Strength, ksi 193 173 140 79
0.2% Yield Strength, ksi 132 112 112 60
Elongation, % 27 21 12 12
Hardness, Rockwell C 34-40 - - -

Typical Rupture Strength, Heat Treated, Sheet - Stress to Rupture at Indicated Time

Temperature, °F 1200 1300 1400 1500 1600
100 Hours, ksi 92 75 53 32 18
1,000 Hours, ksi 80 57 35 19 10

Waspaloy® is a registered trademark of United Technology Corp