C715 Copper Nickel


INTRODUCTION

Aufhauser C715 Copper Nickel is known for its strength, workability, formability, and weldability. The addition of nickel strengthens the weld metal and improves the corrosion resistance, particularly against salt water. The inclusion of controlled quantities of iron also gives the alloy an extraordinary resistance to general corrosion and stress corrosion cracking, as well as to erosion. It also protects against impingement due to turbulent water containing air bubbles and silt flowing at high velocities. The weld metal has good hot/cold ductility. Welding is done in all positions. When welding with the GTAW and GMAW processes, no preheat is required. C715 is the welding grade referenced in ASTM and military specifications.

APPLICATIONS

  • Filler metal used for MIG, TIG, oxyacetylene and submerged arc welding of wrought or cast copper-nickel 70/30, 80/20 and 90/10 to themselves or to each other
  • Joining copper-nickel alloys to nickel-copper Alloy 400, R-405, K-500 or high nickel Alloy 200

GENERAL INFORMATION

Chemical Composition
Copper Manganese Iron Silicon Nickel Phosphorus Titanium Others
Remainder 1.0 0.40-0.75 0.25 29.0-32.0 0.02 0.20-0.50 0.50

Note: Copper contains Silver; Nickel contains Cobalt. All values are maximum percentage, unless shown in range.

ADDITIONAL INFORMATION

Copper and its alloys require a relatively high heat input with shortened welding time. Higher preheat temperatures and faster welding rates than for steel are necessary.

PHYSICAL and MECHANICAL PROPERTIES
Tensile Strength 50,000 psi, min.
Elongation in 2" 15%
Brinell Hardness 60-80
Liquidus 2260°F (1238°C)
Solidus 2120°F (1160°C)
 
SPECIFICATIONS MEET OR EXCEED
AWS A5.7 Class ERCuNi
ASME SFA5.7, Class ERCuNi
QQ-R-571C
MIL-E-21562 Type MIL-RN67, MIL EN67
MIL-R-19631B Type MIL-RCuNi
MIL-1-23413 (MIL-67)

 

STANDARD SIZES AND DIAMETERS
Diameters Round Wire Rod
1/32", 1/16", 3/32", Not specified 18"
1/8", 5/32", 3/16",   36"
1/4", 5/16", 3/8"    

 

FABRICATION PROPERTIES
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Good
Gas Shielded Arc Welding Excellent
Coated Metal Arc Welding Excellent
Spot Weld Excellent
Seam Weld Excellent
Butt Weld Excellent
Capacity for Being Cold Worked Good
Capacity for Beign Hot Formed Good
Machinability Rating 20
 
TYPICAL USES FOR ALLOY C715
Product Category Product Reason Category Reason
Industrial Boiler Parts Conductivity (Thermal) Thermal Conductivity
  Boiler Parts Corrosion Resistance Corrosion Resistance to 700°F
  Boiler Parts Welding Characteristics Weldability
  Condenser Components Corrosion Resistance Corrosion Resistance
  Condenser Components Corrosion Resistance Corrosion Resistance to 700°F
  Condenser Components Forming Characteristics Formability
  Condenser Components Mechanical Properties Moderate Strength
  Condenser Plates Corrosion Resistance Corrosion Resistance
  Condenser Plates Corrosion Resistance Corrosion Resistance to 700°F
  Condenser Plates Corrosion Resistance Corrosion Resistance to Salt Water
  Condenser Plates Forming Characteristics Formability
  Condenser Plates Mechanical Properties Moderate Strength
  Condensers Corrosion Resistance Corrosion Resistance
  Condensers Corrosion Resistance Corrosion Resistance to 700°F
  Condensers Corrosion Resistance Corrosion Resistance to Salt Water
  Condensers Mechanical Properties Moderate Strength
  Distiller Tubes Corrosion Resistance Corrosion Resistance
  Distiller Tubes Corrosion Resistance Corrosion Resistance to 700°F
  Distiller Tubes Corrosion Resistance Corrosion Resistance to Salt Water
  Distiller Tubes Forming Characteristics Formability
  Distiller Tubes Mechanical Properties Moderate Strength
  Distiller Tubes Welding Characteristics Weldability
  Evaporator Tubes Corrosion Resistance Corrosion Resistance
  Evaporator Tubes Corrosion Resistance Corrosion Resistance to 700°F
  Evaporator Tubes Corrosion Resistance Corrosion Resistance to Salt Water
  Evaporator Tubes Forming Characteristics Formability
  Evaporator Tubes Mechanical Properties Moderate Strength
  Evaporator Tubes Welding Characteristics Weldability
  Ferrules Corrosion Resistance Corrosion Resistance
  Ferrules Corrosion Resistance Corrosion Resistance to 700°F
  Ferrules Corrosion Resistance Corrosion Resistance to Salt Water
  Ferrules Forming Characteristics Formability
  Ferrules Mechanical Properties Moderate Strength
  Flexible Metal Hose Corrosion Resistance Corrosion Resistance
  Flexible Metal Hose Corrosion Resistance Corrosion Resistance to Salt Water
  Flexible Metal Hose Forming Characteristics Formability
  Heat Exchanger Components Corrosion Resistance Corrosion Resistance
  Heat Exchanger Components Corrosion Resistance Corrosion Resistance to 700°F
  Heat Exchanger Components Corrosion Resistance Corrosion Resistance to Salt Water
  Heat Exchanger Components Forming Characteristics Formability
  Heat Exchanger Components Mechanical Properties Moderate Strength
  Heat Exchanger Tubes Corrosion Resistance Corrosion Resistance
  Heat Exchanger Tubes Corrosion Resistance Corrosion Resistance to 700°F
  Heat Exchanger Tubes Corrosion Resistance Corrosion Resistance to Salt Water
  Heat Exchanger Tubes Forming Characteristics Formability
  Heat Exchanger Tubes Mechanical Properties Moderate Strength
  Heat Exchanger Tubes Welding Characteristics Weldability
  Process Equipment Corrosion Resistance Corrosion Resistance
  Process Equipment Corrosion Resistance Corrosion Resistance to 700°F
  Process Equipment Forming Characteristics Formability
  Process Equipment Mechanical Properties Moderate Strength
  Propeller Sleeves Corrosion Resistance Corrosion Resistance
  Propeller Sleeves Corrosion Resistance Corrosion Resistance to 700°F
  Propeller Sleeves Forming Characteristics Formability
  Propeller Sleeves Mechanical Properties Moderate Strength
  Pump Impellers Corrosion Resistance Corrosion Resistance to 700°F
  Pump Impellers Corrosion Resistance Corrosion Resistance to Salt Water
  Pump Impellers Welding Characteristics Weldability
  Refrigerators Corrosion Resistance Corrosion Resistance
  Refrigerators Corrosion Resistance Corrosion Resistance to 700°F
  Refrigerators Mechanical Properties Moderate Strength
  Weld Wire Welding Characteristics Weldability
  Welding Backing Rings Corrosion Resistance Corrosion Resistance
  Welding Backing Rings Welding Characteristics Weldability
Marine Fittings Corrosion Resistance Corrosion Resistance
  Fittings Corrosion Resistance Corrosion Resistance to 700°F
  Fittings Corrosion Resistance Corrosion Resistance to Salt Water
  Fittings Forming Characteristics Formability
  Fittings Fouling Resistance Non-Fouling
  Fittings Mechanical Properties Moderate Strength
  Pump Bodies and Internal Parts-Sea Water Corrosion Resistance Corrosion Resistance
  Pump Bodies and Internal Parts-Sea Water Corrosion Resistance Corrosion Resistance to Salt Water
  Pump Bodies and Internal Parts-Sea Water Forming Characteristics Cold Workability
  Pump Bodies and Internal Parts-Sea Water Forming Characteristics Hot Workable
  Pump Bodies and Internal Parts-Sea Water Mechanical Properties Moderate Strength
  Pump Bodies and Internal Parts-Sea Water Welding Characteristics Weldability
  Salt Water Flanges Corrosion Resistance Corrosion Resistance
  Salt Water Flanges Corrosion Resistance Corrosion Resistance to Salt Water
  Salt Water Flanges Welding Characteristics Weldability
  Salt Water Pipe Fittings Corrosion Resistance Corrosion Resistance
  Salt Water Pipe Fittings Corrosion Resistance Corrosion Resistance to Salt Water
  Salt Water Pipe Fittings Welding Characteristics Weldability
  Salt Water Piping Corrosion Resistance Corrosion Resistance
  Salt Water Piping Corrosion Resistance Corrosion Resistance to Salt Water
  Salt Water Piping Welding Characteristics Weldability
  Sea Water Condensers Corrosion Resistance Corrosion Resistance
  Sea Water Condensers Corrosion Resistance Corrosion Resistance to 700°F
  Sea Water Condensers Corrosion Resistance Corrosion Resistance to Salt Water
  Sea Water Condensers Fouling Resistance Non-Fouling
  Sea Water Condensers Mechanical Properties Moderate Strength
  Valve Bodies, Sea Water Service Corrosion Resistance Corrosion Resistance
  Valve Bodies, Sea Water Service Corrosion Resistance Corrosion Resistance to Salt Water
  Valve Bodies, Sea Water Service Forming Characteristics Cold Workability
  Valve Bodies, Sea Water Service Forming Characteristics Hot Workable
  Valve Bodies, Sea Water Service Welding Characteristics Weldability
  Water Boxes - Salt Water Applications Corrosion Resistance Corrosion Resistance
  Water Boxes - Salt Water Applications Corrosion Resistance Corrosion Resistance to Salt Water
  Water Boxes - Salt Water Applications Welding Characteristics Weldability

 

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    Aufhauser Corporation
    39 West Mall, Plainview, NY 11803 USA

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