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St. Paul
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Alloy Specifications, Chemistries, and Technical Data

COPPER NICKEL C96400
Aliases
CDA NUMBER C96400
Common Name 70:30 Copper Nickel
Alias 70:30
Alias Cooper Nickel
Alias C964
Alias 964
Nearest Applicable Casting Standards
ASTM (B Series) B369, B30
Federal (QQ-C- Series) 390
Military (Mil-C- Series) 20159
Specification Composition
Minimum Maximum
Lead (Pb) 0.01
Iron (Fe) 0.25 1.5
Nickel (Ni) 28 32
Sulphur (S) 0.02
Phosphorous (P) 0.02
Carbon (C) 0.15
Manganese (Mn) 1.5
Silicon (Si) 0.5
Niobium (Nb) 0.5 1.5
Copper + Sum of Named Elements 99.5
Specification Properties
(Heat Treat 'F' Denotes As Cast) Heat Treat State Minimum
Tensile Strength (ksi) F 60
Yield Strength (.5% extension under load) (ksi) F 32
Elongation (2 inch gauge length) (%) F 20
Typical Properties
Heat Treat State Typical
Modulus of Elasticity (ksi) 21000
Hardness (Brinell) (HB @ 3000kg) 140
Machinability (% of free cutting brass) 20
Fatigue Strength (10^8 cycles) (ksi) 18
Impact Strength (Charpy) (ft-lb) 78
Melting Range (Liquidus-Solidus)(F) 2140-2260
Coefficient of Thermal Expansion (per F @ 68-400F) 0.0000090
Thermal Conductivity (Btu/sq.ft/ft./hr/F @ 68F) 17
Specific Heat (Btu/lb/F @ 68F) 0.09
Electrical Conductivity (% IACS @ 68F) 5
Density (lb/cu.in. @ 68F) 0.323
Pouring Temperature (Light Castings) (F) 2500-2650
Pouring Temperature (Heavy Castings) (F) 2350-2500
Patternmakers Shrinkage (in/ft) 7/32
Drossing Medium
Gassing High
Fluidity High
Shrinkage High
Casting Yield Low
Comments
Wear Resistance: Very good.
Applications
Discharge Casing
Elbows
Flanges
Gland Follower
Gland Followers
Impeller
Mounting Bracket
Packing Gland
Pump Bodies
Suction Casing
Used For Seawater Corrosion
Valves
Great Castings
         St. Paul Foundry 954 Minnehaha Ave West St. Paul MN 55104 651-488-5567 www.stpaulfoundry.com
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St. Paul Foundry
954 Minnehaha Avenue West
Saint Paul, Minnesota 55104
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Alloy Guide Sheet Terms of Use

Use Good Design Principles

1. St. Paul Foundry is providing this information on metal characteristics for informational purposes only. Before making a final decision on alloy selection consider the following and all other appropriate design and specification principles. Please note that this is not an exhaustive list.

2. Consult the appropriate specification from an accredited specifying body (ASTM, SAE, Federal or Military) to determine current minimum values of this alloy.

3. Use appropriate design safety factors.

4. Use Failure Modes and Effects Analysis to help identify possible weaknesses in designs and specifications.

5. Use computerized stress analysis tools.

6. Use appropriate certification requirements for your casting suppliers. These may include test bars, chemical certifications, radiography, dye penetrant or other non-destructive testing methods.

7. Test your design to failure in a controlled environment. Then test it to failure in a simulation of its end use.

8. You and you alone are responsible for the suitability of your design and the materials that you select.

Disclaimer

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