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 .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
Joining Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Fair
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Good

Thermal Properties

Thermal Properties provided by CDA
Treatment Temp./Time - US Temp./Time - SI
Stress Temperature 500 260
Solution Minimum 1425 775
Solution Maximum 1475 802
Solution Time 2  
Solution Medium Water  
Precipitation Value 580 305
Precipitation Time 5  
Precipitation Medium Air  
Annealing Minimum    
Annealing Maximum    
Annealing Time    
Hot Treatment Minimum    
Hot Treatment Maximum    

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