Ostalloy 158
“The Best Tool in the House”
Ostalloy is a remarkable alloy that melts and works at a temperature no hotter than a cup of coffee. As a tool, it is used for the following:
- Tool fixturing
- Holding small parts to be machined
- Tube shaping and bending
- Nesting
- Fixturing dies
- Internal and external support for thin walled tools and parts
This alloy of bismuth, tin, lead and cadmium, a eutectic alloy with a sharply defined melting point of 158ºF, has proven itself in production processes the world over, and has found no equal to its special advantages. They are:
1) Ostalloy 158 does not shrink, but upon solidification it exhibits growth, which helps to lock it to the part to be machined.
2) Low melting temperature, requiring only a simple melting pot and a gas or electric heat source. It is 54ºF below the boiling point of water.
3) It is reusable many times.
4) Easily melted out in hot water.
5) It quickly solidifies.
6) Because of its low temperature, it creates almost no drosses.
Once you use Ostalloy 158, you will never be without it again.
Physical Properties of Ostalloy 158
Melting temperature °F |
158 |
Weight (lbs/in.3 |
.339 |
Specific heat liquid* |
.040 |
Solid |
.040 |
Brinell hardness no. |
9.2 |
Tensile strength (lbs/in.) |
5990 |
Elongation in slow loading* |
200 |
Loading (lbs/in.2)
|
|
Maximum load 30 seconds* |
10,000 |
Maximum load 5 minutes* |
4,000 |
Safe, sustained load |
300 |
Composition (%):
|
|
Bismuth |
50.0 |
Lead |
26.7 |
Tin |
13.3 |
Cadmium |
10.0 |
Growth: time after casting:
|
|
6 minutes |
+.0027 |
30 minutes |
+.0045 |
1 hour |
+.0051 |
5 hours |
+.0051 |
24 hours |
+.0051 |
21 days |
+.0057 |
The above technical data represent predictable characteristics and are to be relied on only as a guide.
*Approximate values
Measurements in inches per inch, compared to Cold Mold Dimensions Test Bar ½² x ½² x 10²

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