C94700

Reference
guide

C94700

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

 *Consult mill for wall thickness

Typical uses

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

Note: Also available in heat-treated condition.

Similar or equivalent specification

CDA ASTM SAE AMS Federal Military Other
C94700 B505
B505M
B947
B292-A
J461
J462
  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

1It is possible that the mechanical requirements of Copper alloy UNS No. C94700 in the heat-treated condition will not be attained if the lead 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 20 °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.   **For stress relief, solution treatment and annealing - time is measured in hours/inch of thickness. For precipitation heat treatment - time is measured in hours.
Treatment Min* Max* Value* Time** Medium
Stress relief     500    
Solution treatment 1425 1475   2 Water
Precipitation treatment     580 5 Air

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