Lead improves machinability in this tin bronze but does not materially affect mechanical properties. The alloy is essentially a free-cutting version of the tin bronze in the Alloy Reference Chart, and has similar properties and uses.
Typical Uses
- Builders Hardware Brackets
- Electrical Switches, Electrical Components
- Fasteners Screw Down Nuts, Screw Down Nuts
- Industrial Bushings, High Strength Machine Parts, Hooks, Frames, Struts, Gears, Bridge Pins, Propellers, Hydraulic Cylinder Parts, Large Valve Stems, Slow Speed, Heavy Load Bearings, Gib, Cams, Hydraulic Cylinder Parts, Forming Dies for Wood Pulp Industry, Wear Rings for Forming Dies for Wood Pulp Industry
- Marine Marine Hardware, Clamps, Covers for Marine Hardware, Boat Parts, Rudders
Similar or Equivalent Specification
| CDA |
ASTM |
ASARCON |
SAE |
AMS |
Federal |
Ingot# |
Military |
Other Desc |
| C86300 |
ASTM B505 |
81 |
SAE 430 B |
|
QQ-C-390B TYPE III |
424 |
MIL-C-22229 COMP 8 |
HIGH STRENGTH YELLOW BRASS |
| |
ASTM B22 |
|
SAE J461 |
|
|
|
|
|
| |
|
|
SAE J462 |
|
|
|
|
|
Chemical Composition (according to ASTM B505-08)
| Cu% |
Sn% |
Pb% |
Zn% |
Fe% |
Ni% |
Sb% |
P% |
S% |
Al% |
Mn% |
Si% |
|
Note: Single values represent maximums.
- A In determining copper minimum, copper may be calculated as copper plus nickel.
|
| 60.00-66.00 |
0.20 |
0.20 |
22.00-28.00 |
2.00-4.00 |
1.0A |
N/A |
N/A |
N/A |
5.00-7.50 |
2.50-5.00 |
N/A |
Mechanical Properties (according to ASTM B505-08)
| Tensile Strength (min) |
Yield Strength (at .5% extention under load min) |
Elongation (in 2in. or 50mm min, %) |
Brinell Hardness (min) |
Remarks |
| Ksi |
MPa |
Ksi |
MPa |
|
|
|
| 110 |
758 |
62 |
427 |
14 |
N/A |
|
Machinability
| Alloy |
Rating |
Density |
| C86300 |
8 |
0.283 |
Physical Properties (provided by CDA)
| |
US Customary |
Metric |
|
|
| Melting Point - Liquidus |
1693 F |
923 C |
| Melting Point - Solidus |
1625 F |
885 C |
| Density |
0.283 lb/in3 at 68 F |
7.83 gm/cm3 @ 20 C |
| Specific Gravity |
7.830 |
7.83 |
| Electrical Resistivity |
130.80 ohms-cmil/ft @ 68 F |
21.74 microhm-cm @ 20 C |
| Electrical Conductivity |
80 %IACS @ 68 F |
0.046 MegaSiemens/cm @ 20 C |
| Thermal Conductivity |
20.50 Btu · ft/(hr · ft2·°F)at 68F |
35.5 W/m · °K at 20 C |
| Coefficient of Thermal Expansion |
12 ·10-6 per oF (68-392 F) |
21.6 ·10-6 per °C (20-200 C) |
| Specific Heat Capacity |
0.090 Btu/lb/°F at 68 F |
377.1 J/kg · °K at 293 K |
| Modulas of Elasticity in Tension |
14200 ksi |
97900 MPa |
| Magnetic Permeability* |
1.090 |
1.09 |
Fabrication Properties (provided by CDA)
| Joining Technique |
Suitability |
| Soldering |
Poor |
| Brazing |
Poor |
| Oxyacetylene Welding |
Poor |
| Gas Shielded Arc Welding |
Poor |
| Coated Metal Arc Welding |
Good |
Thermal Properties (provided by CDA)
| Treatment |
Temp./Time - US |
Temp./Time - SI |
| Stress Temperature |
500 |
260 |
| Solution Minimum |
|
|
| Solution Maximum |
|
|
| Solution Time |
0.0 |
| Solution Medium |
None |
| Precipitation Value |
|
|
| Precipitation Time |
|
|
| Precipitation Medium |
None |
| Annealing Minimum |
|
|
| Annealing Maximum |
|
|
| Annealing Time |
|
| Hot Works Minimum |
|
|
| Hot Works Maximum |
|
|
