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              C97800 Nickel Silver Bronze

C97800 Nickel Silver Bronze   Copper Alloy No. C97800   C97800 Nickel Silver Bronze

Nickel Silver Alloy CDA 978 , 25% Leaded Nickel Silver

ASTM B 505 , ASTM B 271
Chemical Composition % by weight
Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .20
Copper 65.5 64 67
Iron - - 1.5
Lead 1.8 1 2.5
Manganese - - 1
Nickel 25.5 24 27
Phosphorus - - .05
Silicon - - .15
Sulfur - - .08
Tin 5 4 5.5
Zinc 2.5 1 4
Applications
Ornamental and sanitary castings, valves and valve seats, musical instrument components.
Mechanical Properties
Typical for 3" dia. continuous cast bar
Hardness* Brinell Hardness (500 kg load) 130
Tensile Strength** KSI 55
Yield Strength ** KSI (0.5% Ext. under load) 30
Elongation** % in 2 inch 15
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
Thermal Conductivity BTU/ (sq ft-ft-hr-F) 14.7
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 572 F .0000097
Density lb/cu in @ 68 F .320
Electrical Conductivity* (Annealed) % IACS @ 68 F 4.5
Modulus of Elasticity KSI 19,000
*Volume basis
Fabrication Practices
Stress relieving temperature 500 F or 260 C
Time at temperature 1 hour per inch of section thickness
Responds to heat treatment No
Machinability rating (Free Cutting Brass=100) 60
Suitability for being joined by: Soldering/Excellent
Brazing/Excellent
Oxyacetylene Welding/Not Recommended
Oxyacetylene Welding/Not Recommended
Gas Shielded Arc Welding/Not Recommended
Coated Metal Arc Welding/Not Recommended
*Since brazing is performed at temperatures within the hot-short range, strain must be avoided during the brazing and cooling of this alloy.

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.

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C97800 Nickel Silver Bronze

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C97800 Nickel Silver Bronze


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