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Phosphorous Bronze Nuts

Phosphor Bronzes, or tin bronzes, are alloys containing copper, tin and phosphorous. Phosphorous Bronze Fasteners, contain between 0.5 and 11% tin and 0.01 to 0.35 % phosphorous. Phosphorous Bronze Stud Bolts have superb spring qualities, high fatigue resistance, excellent formability and solderability, and high corrosion resistance. Phosphorous Bronze Fasteners primarily used for electrical products, other uses include corrosion resistant bellows, diaphragms, and spring washers.
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Phosphor Bronzes, or tin bronzes, are alloys containing copper, tin and phosphorous. Phosphorous Bronze Fasteners, contain between 0.5 and 11% tin and 0.01 to 0.35 % phosphorous. Phosphorous Bronze Stud Bolts have superb spring qualities, high fatigue resistance, excellent formability and solderability, and high corrosion resistance. Phosphorous Bronze Fasteners  primarily used for electrical products, other uses include corrosion resistant bellows, diaphragms, and spring washers. 

 

Phosphorous Bronze Fasteners combine good strength and fatigue resistance with good machinability, high wear resistance and corrosion resistance. Phosphorous Bronze Fasteners have a wide freezing range and extensive segregation of the alloying occurs on cooling. Phosphor bronze which is often referred to as tin bronze or phos bronze is an alloy of copper, tin and phosphorous.


Standard Specification For Phosphorous Bronze Fasteners

Material
Specification
Standards
Size
     

Phosphorous Bronze

ASTM

ASTM C54400

1/4″ to 2″



Phosphorous Bronze Fasteners Equivalent Grades

CDA
ASTM
ASARCON
SAE
AMS
Federal
Military
Other
C54400
B139
 


J461 J463
 


 


 


 



Chemical Composition of Phosphorous Bronze Fasteners

Cu%
Sn%
Pb%
Zn%
Fe%
P%
Remainder
3.50-4.50
3.00-4.00
1.50-4.50
0.10
0.01-0.50


Phosphorous Bronze Fasteners Mechanical Properties

Tensile Strength, min
60 ksi
415 MPa
Yield Strength @ .5% ext under load min
N/A
N/A
Elongation in 2 in. or 50 mm min, %
10
 
Brinell Hardness, min
N/A
 
Machinability Rating
80%


Phosphorous Bronze Fasteners Physical Properties

Density g/cm³
8.89
Melting Temperature Range °C
920-1000
Thermal Conductivity W/mK
86.5
Electrical Resistivity μΩ.m15°C
9
Coefficient of Thermal Expansion 0-250°C
17.3
Relative Magnetic Permeability
< 1.01
Coefficient of Friction


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