C94700

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Product Description Nickel-Tin Bronze
Solids: 1/2" to 10" O.D.
Tubes: 1" to 16" O.D.
Rectangles: Up to 20"
Standard Lengths: 144"
Shape/Form: semi-finished, mill stock or near-net shapes, anode, bar stock, billet/bloom, squares, hex, plate, profile or structural shape, flats/rectangular bar

Typical Uses

Electrical: circuit breaker parts
Industrial: feeding mechanisms, gears, shift forks, piston cylinders, wear guides, valve components, bearings, nozzles

Note: Also available in a heat-treated condition.

Similar or Equivalent Specification

CDA ASTM Asarcon SAE AMS Federal Military Other
C94700 B505
B505M
B947
B292-A
50N     QQ-C-390, F2   Cast Nickel-Tin Bronze

Chemical Composition

Cu% Pb%1 Sn% Zn% Fe% P% Ni%2 Al% Mn% S% Sb% Si%
Chemical Composition according to ASTM B505/B505M-18

1The mechanical properties of C94700 (heat treated) may not be attainable if the Pb content exceeds 0.01%.   2Ni value includes Co.
Note: Cu + Sum of Named Elements, 98.7% min. Single values represent maximums.
85.00-
90.00
 
0.09
4.50-
6.00
1.00-
2.50
 
0.25
 
0.05
4.50-
6.00
 
0.005
 
0.20
 
0.05
 
0.15
 
0.005

Machinability

Copper Alloy UNS No. Machinability Rating Density (lb/in3 at 68 °F)
C94700 30 0.32

Mechanical Properties

Mechanical Properties according to ASTM B505/B505M-18
Tensile Strength, min Yield Strength, at 0.5% Extension Under Load, min Elongation, in 2 in. or 50 mm min Brinell Hardness (500 kg load) Remarks
ksi MPa ksi MPa % typical BHN  
45 310 20 138 25 85  

Physical Properties

Physical Properties provided by CDA
  US Customary Metric
Melting Point - Liquidus 1880 °F 1027 °C
Melting Point - Solidus 1660 °F 904 °C
Density 0.32 lb/in3 at 68 °F 8.86 gm/cm3 at 20 °C
Specific Gravity 8.86 8.86
Electrical Conductivity 12% IACS at 68 °F 0.07 MegaSiemens/cm at 20 °C
Thermal Conductivity 31.2 Btu/sq ft/ft hr/°F at 68 °F 54 W/m at 20 °C
Coefficient of Thermal Expansion 68-392 10.9 ·10-6 per °F (68-392 °F) 18.8 ·10-6 per °C (20-200 °C)
Specific Heat Capacity 0.09 Btu/lb/°F at 68 °F 377.1 J/kg at 293 °C
Modulus of Elasticity in Tension 15000 ksi 103400 MPa

Fabrication Properties

Fabrication Properties provided by CDA

*Since brazing is performed within the hot-short range, strain must be avoided during brazing and cooling.
Technique Suitability
Soldering Excellent
Brazing* Excellent
Oxyacetylene Welding Fair
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Good
Machinability Rating 30

Thermal Properties

Thermal Properties provided by CDA

*Temperature is measured in Fahrenheit.   **Time is measured in minutes.
Treatment Min* Max* Value* Time** Medium
Stress Relief     500    
Solution Treatment 1425 1475   2 Water
Precipitation Treatment     580 5 Air

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