Names formerly used (not recommended):
230, Leaded Tin Bronze, Leaded “G” Bronze, 87-8-1-4
Chemical Composition % by weight
Element |
Nominal |
Minimum |
Maximum |
Aluminum |
- |
- |
.005 |
Antimony |
- |
- |
.25 |
Copper |
87 |
85.0 |
89.0 |
Iron |
- |
- |
.25 |
Lead |
- |
.30 |
1.0 |
Nickel |
- |
- |
1.0 |
Phosphorous |
- |
- |
.05 |
Silicon |
- |
- |
.005 |
Sulfur |
- |
- |
.05 |
Tin |
8 |
7.5 |
9.0 |
Zinc |
4 |
2.5 |
5.0 |
Typical Applications
Bushings, bearings, gears, valves, pipe fittings and high pressure steam castings;
superior machinability to Copper Alloy No. C90300
Mechanical Properties
Test Bar Values as Sand Cast
Property |
|
Minimum |
Typical |
Tensile Strength |
ksi |
36.0 |
40.0 |
Yield Strength |
ksi (0.5% Extension Under Load) |
16.0 |
20.0 |
Elongation |
% in 2 inches |
18.0 |
25.0 |
Hardness |
Brinell (500 kg Load) |
- |
70.0 |
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) |
42 |
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)
*Properties are similar to 235 Alloy
*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.
|
