W

W

Alloy W is a solid solution strengthened nickel superalloy developed primarily as a filler metal for welding dissimilar alloys. Alloy W has excellent dissimilar welding characteristics, and is widely used for that purpose in the gas turbine, aerospace and chemical process industries. The properties of dissimilar weld joints made with alloy W are dependent upon the base metal being joined, but are generally acceptable for a wide range of combinations.

Chemistry

 CrNi+CoMoCo*VCFeMnSiPS
MIN 4.0--23.0------4.0--------
MAX 6.0Reste26.02.50.60.127.01.01.00.040.03

Specifications

AMS 5786
AWS A5.14
ERNiMo-3
UNS N10004

Inventory

W Welding Products

Common Trade Names

Alloy W, Hastelloy® W

Features

  • One of the best choices for dissimilar alloy weldments
  • Resists weld cracking in restrained joints of precipitation hardenable alloys
  • Oxidation resistant through 1400°F
  • Low coefficient of thermal expansion

Applications

  • Joining crack sensitive precipitation hardening alloys
  • Rings in gas turbine engines

Physical Properties

Density: 0.325 lb/in3
Melting Range: 2350-2510°F

Temperature, °F 800 1000 1200 1400 1600 1800
Coefficient* of Thermal Expansion, in/in°F x 10-6 7.3 7.4 7.4 7.8 8.2 8.4

* 70°F to indicated temperature.

Mechanical Properties

Representative Tensile Properties, Bar (AMS 5755)

Temperature, °F 70 1000 1200 1400 1600 1800
Ultimate Tensile Strength, ksi 140 121 104 89 61 32
0.2% Yield Strength, ksi 76 54 53 56 49 24
Elongation, % 51 52.5 27 20.3 31.8 47.5

Typical Rupture Strength, Bar (AMS 5755)

Temperature, °F 1300 1400 1500 1600 1700
100 Hours, ksi 35 26 18 12 8
1,000 Hours, ksi 28 19 12 8 5

® Hastelloy is a registered trademark of Haynes International