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
| Cr | Ni+Co | Mo | Co* | V | C | Fe | Mn | Si | P | S | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 4.0 | -- | 23.0 | -- | -- | -- | 4.0 | -- | -- | -- | -- |
| MAX | 6.0 | Reste | 26.0 | 2.5 | 0.6 | 0.12 | 7.0 | 1.0 | 1.0 | 0.04 | 0.03 |
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