a
135 East Hodges Street
Norton, MA 02766
Phone: (508) 285-9831
Fax: (508) 285-9832
Copper Alloy No. C90700

Names formerly used (not recommended) 205, Tin Bronze, 89-11

Chemical Composition % by weight

Element

Nominal

Minimum

Maximum

Aluminum

-

-

.005

Antimony

-

-

.20

Copper

89

88.0

90.0

Iron

-

-

.15

Lead

-

-

              .50

Nickel

-

-

.50

Phosphorous

-

-

.30

Silicon

-

-

.005

Sulfur

-

-

.05

Tin

11

10.0

12.0

Zinc

-

-

.50

 

Typical Applications

Gears, bearings, bushings

 

Mechanical Properties

Test Bar Values as Sand Cast

Property

 

Minimum

Typical

Tensile Strength

ksi

35.0

44.0

Yield Strength

ksi (0.5% Extension Under Load)

18.0

22.0

Elongation

% in 2 inches

10.0

20.0

Hardness

Brinell (500 kg Load)

-

80.0

 

Fabrication Practices

Suitability for being joined by:

 

Soldering

Excellent

Brazing

Good

Oxyacetylene Welding

Fair

Carbon Arc Welding

Fair

Gas Shielded Arc welding

Fair

Coated Metal Arc Welding

Fair

 

Machinability Rating
(Free Cutting Brass=100)

20

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.

 

About / Alloys / Lead Free / Capabilities / Request A Quote / Contact Us
Copyright© 2010 Babs Foundry, Inc. All Rights Reserved.
Designed by BF Enterprises