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.
Chemistry

	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

Specifications
DMR 34.070
GE B50AB42B, GE B50TF55
MSRR.9500-226, MTS 1087A, PWA 694
Inventory
694 Weld Wire
Common Trade Names
CM-64, Coast Metal 64, Alloy 694
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

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