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Cupro Nickel Tig
INTERNATIONAL CLASSIFICATIONS |
AWS/ASME A 5.7 ER CuNiAl
FEATURES & APPLICATIONS |
Used for welding of cast and wrought nickel-aluminum-bronze parts subjected to corrosion, erosion and cavitation in salt or brackish water. It is used to repair and maintenance or Nibral ship propellers, ship fittings, power and chemical plant pumps, marine propulsion systems and oil recovery pumps.
All Weld Metal Analysis (Typical Weight %) |
Microstructure: Complex alpha matrix with kappa compound phases and some retained beta phase.
Color: Pale yellow
| Mn | Si | Ni | Fe | Pb | Al | Cu |
| 2.5 | .02 | 5.0 | 4.0 | .001 | 9.0 | Bal |
Typical Mechanical Properties |
Undiluted Weld Metal Maximum Value Up to:
Tensile Strength 104,000 PSI (718 MPa)
Yield Strength 59,000 PSI (407 MPa)
Elongation 23%
Hardness 196 BHN
Welding Current & Instructions |
RECOMMENDED CURRENT: DC- (Argon gas should be used to minimize burn-off of the tungsten electrode)
WELDING TECHNIQUES: Insure welding surface is free of contamination. Preheat thicker sections 750 degrees Fahrenheit – 1100 degrees Fahrenheit (400 degrees Celsius – 600 degrees Celsius)
RECOMMENDED AMPERAGE SETTINGS:
Diameter Metal Thickness Tungsten Size Amps
Inches (mm) Inches (mm) Inches (mm)
1/16 (1.6) 1/16 (1.6) 1/16 (1.6) 70-150
3/32 (2.5) 1/8” (3.2) 3/32 (2.5) 140-230
1/8 (3.2) 3/16 (5.0) 1/8 (3.2) 225-320