COPPER & COPPER ALLOY PRODUCTS
WROUGHT COPPER ALLOYS
CONTINUOUS CAST COPPER ALLOYS
CENTRIFUGAL CAST COPPER ALLOYS
MADE TO ORDER COPPER ALLOYS
FINISHED MACHINE PARTS
HYDRAULIC & PNEUMATIC PARTS
CONTINUOUS CAST PRODUCTION
COPPER ALLOY DATABASE
CONTINUOUS CAST IRON PRODUCTS
QUALITY CONTROL PROCEDURES
NEW PRODUCTS & IMPROVEMENTS
red.gif (248 bytes) ONLINE INQUIRY FORM

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/F @ 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

The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.