Copper-Nickel C71500 (70/30)
Copper Alloy No. C71500
Copper Nickel Alloy 70/30
Chemical Composition % by weight
Copper Nickel Alloy 70/30
Chemical Composition % by weight
Element | Nominal | Minimum | Maximum |
Copper | 69.5 | Rem. | Rem. |
Lead | - | - | .05* |
Iron | .50 | .40 | 1 |
Zinc | - | - | 1* |
Nickel | 30 | 29 | 33 |
Manganese | - | - | 1 |
*When the product is subsequent welding applications and so specified by the purchaser, Zn shall be .50% max., Pb .025% max., P .02% max., Sulfur .02% max. and Carbon .05% max.
Applications
Condensers, condenser plates, distiller tubes, evaporator and heat exchanger tubes, ferrules, salt water piping.
Common Fabrication Processes
Forming and bending, welding.
Mechanical Properties
Typical for 1" OD Tube x .065" wall thickness
Hardness* | Rockwell B Scales | 45 |
Tensile Strength** | KSI | 60 |
Yield Strength** (.5% EAU) | KSI | 25 |
Elongation** | % in 2 inch | 45 |
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
Thermal Conductivity | BTU/ (sq ft-ft-hr-F) | 17 |
Specific Heat | BTU/lb/ºF @ 68F | .09 |
Thermal Expansion | Per °F from 68 F to 572 F | .0000090 |
Density | lb/cu in @ 68 F | .323 |
Electrical Conductivity* (Annealed) | % IACS @ 68 F | 4.6 |
Modulus of Elasticity (Tension) | KSI | 22,000 |
*Volume basis
Fabrication Properties
Capacity for being cold worked | Good |
Capacity for being hot formed | Good |
Suitability for being joined by: | Soldering/Excellent |
Brazing/Excellent | |
Oxyacetylene Welding/Good | |
Gas Shielded Arc Welding/Excellent | |
Coated Metal Arc Welding/Excellent | |
Resistance Welding | Spot/Excellent |
Seam/Excellent | |
Butt/Excellent |