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- 694 (CM-64)
694 (CM-64)
Product Information
Alloy 694, also referred to as Coast Metal 64, is a cobalt-chromium-tungsten alloy providing high strength and stability at temperatures up to 2100°F. Deposits of alloy 694 have outstanding resistance to wear, erosion, creep, thermal fatigue and oxidation. The principal application is for hard-facing turbine blade interlock surfaces. Wire diameters 0.035", 0.045" and 0.062" are available in straight cut lengths or layer wound spools. This alloy is also available in shaped squares, flats and diamonds sized per customer requirements.
Common Trade Names
CM-64, Alloy 694
Inventory
Alloy 694 Welding Products
Specifications
HARDFACING MATERIALS:
GE: B50TF55
PWA: PWA 694
Rolls-Royce: MSRR.9500-226
Textron Lycoming: M3820
Allison: EMS 56701
Snecma: DMR 34.070
MTU: MTS 1087A
Chemical Composition, %
| Cr | Ni | Mo | Co | W+Mo | Va | B | C | Fe | Mn | Su | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 26 | 4.0 | - | - | 18.0 | 0.75 | 0.005 | 0.7 | - | - | - |
| MAX | 30.0 | 6.0 | 0.5 | Balance | 21.0 | 1.25 | 0.1 | 1.0 | 3.0 | 1.0 | 1.0 |
Features
- Hot erosive wear resistance
- Oxidation resistance to 2100°F
- Thermal shock, creep strength
Applications
- Hardfacing gas turbine blade shroud interlock surfaces and other wear location areas
Physical Properties
Density: 0.327 lb/in3
Melting Range: 7.7 in/in°F x 106
Physical Properties
| 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 | 121 |
* 70°F to indicated temperature.
Mechanical Properties
Representative Tensile Properties
| Temperature, °F | 1800 |
| Ultimate Tensile Strength, ksi | 48 |
Typical Hardness
| Temperature, °F | 70 | 800 | 1000 | 1200 | 1400 |
| Hot Hardness, DPH | 440 | 355 | 20 | 210 | 220 |
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