C715 Copper Nickel
Nominal Chemical
Composition
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 | Lead | Others |
|---|---|---|---|---|---|---|---|---|
| Remainder | 1.0 | 0.40 - 0.75 | 0.25 | 29.0 - 32.0 | 0.02 | 0.20 - 0.50 | 0.02 | 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
| Liquidus | 2260°F (1238°C) |
| Solidus | 2120°F (1160°C) |
| Tensile Strength | 50,000 psi, min. |
| Elongation in 2" | 15% |
| Brinell Hardness (500 kgf) | 60-80 |
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) |
| UNS C71581 |
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 |