Brass Copper Castings India
Copper-Nickel C71500 (70/30)


Copper Alloy No. C71500
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