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Copper Alloy No. C85400

Names formerly used (not recommended):
403, Commercial No. 1 Yellow Brass,   67-1-3-29

Chemical Composition % by weight

Element

Nominal

Minimum

Maximum

Aluminum

-

-

.35

Copper

67

65.0

70.0

Iron

-

-

.7

Nickel

-

-

1.0

Lead

3

1.5

3.8

Silicon

-

-

.05

Tin

1

.50

1.5

Zinc

29

24.0

32.0

 

Typical Applications

General purpose yellow casting alloy for applications not subject to high internal pressure,
furniture hardware, ornamental castings, radiator fittings, ship trimmings, gas cocks,
battery clamps, valves and fittings

 

Mechanical Properties

Test Bar Values as Sand Cast

Property

 

Minimum

Typical

Tensile Strength

ksi

30.0

34.0

Yield Strength

ksi (0.5% Extension Under Load)

11.0

12.0

Elongation

% in 2 inches

20.0

35.0

Hardness

Brinell (500 kg Load)

-

50.0

 

Fabrication Practices

Suitability for being joined by:

 

Soldering

Excellent

Brazing

Excellent

Oxyacetylene Welding

Fair

Carbon Arc Welding

Poor

Gas Shielded Arc welding

Poor

Coated Metal Arc Welding

Poor

 

Machinability Rating
(Free Cutting Brass=100)

80

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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