IN 1982 CC497K | CuSn5Pb20

BP20 | Bronze Copper Alloy Tin Lead

Available formats: Bars, Tubes, Caps, Plates and Plates.

features

The lead content in the BP20 alloy is between 7 and 30 percent. Tin bronzes with high lead content are free cut and retain favorable thermal conductivity and good lubrication due to lead content.

 

Tin lead bronzes such as BP20 are ideal for bearing applications where there could be a loss of the lubrication limit. These alloys have excellent performance in unforgiving environments where there may be foreign matter, such as dirt and other foreign materials.

 

Alloys with a high lead content can wrap foreign matter due to its malleable nature and, in doing so, protect the wear surface of a coupling part, such as a shaft.

Applications

INDUSTRIAL: thrust block due to its properties: Corrosion resistance, Corrosion resistance in many environments, Low friction coefficient, Wear resistance, Excellent machinability.

 

TYPICAL USES: Bearings, bushings, centrifuge bushings, gears, hydraulic parts, impellers, linings, piston rings, pump and valve components, sleeves, steam fittings.

Chemical composition

%
Cu
Neither
P
Pb
Sn
Zn
Al
Fe
S
Sb
Others
Si

Min.

72

-

-

18

4,5

-

-

-

-

-

-

-

Max.

79

1

0,5

22

6,5

1

0,005

0,25

0,08

0,8

-

0,005

Chemical composition according to ASTM B505 / B505M-18

features

The lead content in the BP20 alloy is between 7 and 30 percent. Tin bronzes with high lead content are free cut and retain favorable thermal conductivity and good lubrication due to lead content.

 

Tin lead bronzes such as BP20 are ideal for bearing applications where there could be a loss of the lubrication limit. These alloys have excellent performance in unforgiving environments where there may be foreign matter, such as dirt and other foreign materials.

 

Alloys with a high lead content can wrap foreign matter due to its malleable nature and, in doing so, protect the wear surface of a coupling part, such as a shaft.

Applications

INDUSTRIAL: thrust block due to its properties: Corrosion resistance, Corrosion resistance in many environments, Low friction coefficient, Wear resistance, Excellent machinability.

 

TYPICAL USES: Bearings, bushings, centrifuge bushings, gears, hydraulic parts, impellers, linings, piston rings, pump and valve components, sleeves, steam fittings.

Chemical composition

Element
Min.%
Max. %

Cu


Neither


P


Pb


Sn


Zn


Al


Fe


S


Sb


Others / Alloys


Mn

72


-


-


18


4,5


-


-


-


-


-


-


-

79


1


0,5


22


6,5


1


0,005


0,25


0,08


0,8


-


0,005

Chemical composition according to ASTM B505 / B505M-18

International Equivalences

BRONCESVAL
ISO / EN
W Nr / DIN
UNS / CDA
SAE
BS
DIN / ISO
ASTM

BP20

CuSn5Pb20

CC497K

C94100

94

LB5

-

-

Mechanical properties

Tensile strength
(MPa)
Elastic limit
(MPa)
Elongation
(%)
Brinell hardness
(HB)
Observations

172

117

7

50

-

Mechanical properties according to ASTM B505 / B505M-18

International Equivalences

BRONCESVAL BP20
ISO / EN CuSn5Pb20
W Nr / DIN CC497K
UNS / CDA C94100
SAE 94
BS LB5
DIN / ISO -
ASTM -

Mechanical properties

Tensile strength (MPa) 172
Elastic Limit (MPa) 117
Elongation (%) 7
Brinell hardness (HB) 50
Observations -

Mechanical properties according to ASTM B505 / B505M-18

General Physical Properties

Melting Point (Liquid) 950 ° C
Melting Point (Solid) 855º C
Density 9.2 gm / cm at 20 ° C
Specific weight 9,2
Electric conductivity -
Thermal conductivity -
Thermal expansion coefficient -
Specific heat capacity -
Tension Elasticity Module -
Magnetic Permeability * -

Physical properties provided by CDA

Manufacturing Properties

Welding Good
Braised Means, medium
Oxyacetylene Welding Not recommended
Gas arc welding Not recommended
Coated Metal Arc Welding Not recommended
Machinability Classification -

Manufacturing properties provided by CDA

Formats

  • BP20 Bronze Bars
  • BP20 Bronze Tubes
  • BP20 Bronze Caps
  • BP20 Bronze Plates
  • BP20 Bronze Plates

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