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Copper Alloy No. C87850

Names formerly used (not recommended): Eco Brass, Lead Free

Chemical Composition % by weight

Element

Nominal

Minimum

Maximum

Copper

76.0

74.0

78.0

Antimony

-

-

.10

Iron

-

-

.10

Lead

-

-

.09

Manganese

-

-

.10

Nickel

-

-

.20

Phosphorus

.12

.05

.20

Silicon

3.0

2.7

3.4

Tin

-

-

.30

Zinc

20.9

-

Remainder

 

Typical Applications

Lead-Free valve bodies for water, marine products, plumbing fittings, faucets, water meter casings

 

Mechanical Properties

Test Bar Values as Sand Cast

Property

 

Minimum

Typical

Tensile Strength

ksi

59.0

63.0

Yield Strength

ksi (0.5% Extension Under Load)

22.0

26.0

Elongation

% in 2 inches

16.0

25.0

Hardness

Brinell (500 kg Load)

-

60.0

 

Fabrication Practices

Suitability for being joined by:

 

Soldering

Excellent

Brazing

Excellent

Oxyacetylene Welding

Good

Spot Welding

Good

Seam Welding

Good

Butt Welding

Good

 

Machinability Rating
(Free Cutting Brass=100)

70

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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