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Copper Alloy No. C92900

Names formerly used (not recommended):
Leaded Nickel Tin Bronze, 84-10-2 1/2-0-3 1/2

Chemical Composition % by weight

Element

Nominal

Minimum

Maximum

Aluminum

-

-

.005

Antimony

-

-

.25

Copper

-

82.0

86.0

Iron

-

-

.20

Lead

-

2.0

3.2

Nickel

-

2.8

4.0

Phosphorous

-

-

.50

Silicon

-

-

.005

Sulfur

-

-

.05

Tin

-

9.0

11.0

Zinc

-

-

.25

 

Typical Applications

Gears, wear plates and guides, cams, parts requiring more machining than those
made of either Copper Alloy Nos. C91600 or C91700

 

Mechanical Properties

Test Bar Values as Sand Cast

Property

 

Minimum

Typical

Tensile Strength

ksi

45.0

47.0

Yield Strength

ksi (0.5% Extension Under Load)

25.0

26.0

Elongation

% in 2 inches

8.0

20.0

Hardness

Brinell (500 kg Load)

75.0

80.0

 

Fabrication Practices

Suitability for being joined by:

 

Soldering

Excellent

Brazing

Good

Oxyacetylene Welding

Not Recommended

Carbon Arc Welding

Not Recommended

Gas Shielded Arc welding

Not Recommended

Coated Metal Arc Welding

Not Recommended

 

Machinability Rating
(Free Cutting Brass=100)

40

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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