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Copper Alloy No. C87500

Names formerly used (not recommended): 500, Silicon Brass

Chemical Composition % by weight

Element

Nominal

Minimum

Maximum

Aluminum

-

-

.50

Copper

82

79.0

-

Lead

-

-

.09

Silicon

4

3.0

5.0

Zinc

14

12.0

16.0

 

Typical Applications

Bearings, gears, impellers, rocker arms, valve stems, small boat propellers.

 

Mechanical Properties

Test Bar Values as Sand Cast

Property

 

Minimum

Typical

Tensile Strength

ksi

60.0

67.0

Yield Strength

ksi (0.5% Extension Under Load)

24.0

30.0

Elongation

% in 2 inches

16.0

21.0

Hardness

Brinell (500 kg Load)

-

115.0

 

Fabrication Practices

Suitability for being joined by:

 

Soldering

Not Recommended

Brazing

Fair

Oxyacetylene Welding

Fair

Carbon Arc Welding

Not Recommended

Gas Shielded Arc welding

Fair

Coated Metal Arc Welding

Not Recommended

 

Machinability Rating
(Free Cutting Brass=100)

50

C83600 (115) | C84400 (123) | C90300 (225) | C92300 (235) | C92200 (245) | C90700 (205) | C92900 (206A)
(319) Aluminum | (356) Aluminum | (535) Almag | C85400 (403) | C86500 (421) | C86300 (424)
C95400 (415C) | C87500 (500-13B) | C89833 (836) | C87850 (Eco Brass)

*Since brazing is performed at temperatures within the hot-short range, strain must be
avoided during the brazing and cooling of this alloy.

The values listed above represent reasonable approximations suitable for general engineering use.
Due to commercial variations in composition and to manufacturing limitations, they should not
be used for specification purposes. See applicable A.S.T.M. specification references.

 

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