These amazing Bismuth Alloys start melting at 117ºF (47ºC) and solidify
at room temperature, expanding slightly in the process of cooling.
So dependable are the melting points of all Bismuth Alloys that they
have been used in fire doors and sprinkler heads.
Thin wall metal tubing can be successfully bent without the usual distortion
when filled with a low melting alloy. The tube then bends as if it
were a solid bar, and the alloy can be melted out in hot water and collected
for re–use.
Other applications include: using dies made of Bismuth Alloys for wax patterns
to reproduce fine detail and surface finish; using the Alloys as solder
when high heat is undesirable; measurement of inaccessible cubic contents;
and for holding delicate work in position for initial preparation
for machining.
Hobbyists
have dreamed up dozens of uses for these alloys, from making table
top figures to increasing the weight of a model steam locomotive.
These
fusible metals can be melted under hot water and all four types can
be recovered and used over and over again. No special furnaces are
needed. We use the melting pot MEP–20 listed below.
|
LMA–117 |
117ºF |
(47ºC) |
12 |
$41.10 |
$51.37 |
$143.83 |
|
Order Example:LMA-117-4 is 1/4lb. of 117ºF Low Melting Alloy |
|
|
|
|
|
|
|
Weight Lb/in3
|
0.32
|
0.339
|
0.38
|
0.315
|
|
Composition %
|
|
|
|
|
|
Bismuth
|
44.7
|
50.0
|
55.5
|
58.0
|
|
Lead
|
22.6
|
26.7
|
44.5
|
–
|
|
Tin
|
8.3
|
13.3
|
–
|
42.0
|
|
Cadium
|
5.3
|
10.0
|
–
|
–
|
|
Indium
|
19.1
|
–
|
–
|
–
|
|
Growth/Shrinkage
|
|
|
|
|
|
Time after casting:
|
(Inches per Inch)
|
|
|
|
6 Min.
|
+.0002
|
+.0027
|
–.0011
|
+.0007
|
|
30 Min.
|
0000
|
+.0045
|
–.0010
|
+.0006
|
|
1 Hour
|
–.0001
|
+.0051
|
–.0008
|
+.0006
|
|
5 Hours
|
–.0002
|
+.0051
|
.0000
|
+.0005
|
|
24 Hours
|
–.0002
|
+.0051
|
+.0008
|
+.0005
|
|
21 Days
|
–.0002
|
+.0057
|
+.0022
|
+.0005
|
Versatile and easy to use, this Melting Pot requires a minimum of adjustments.
The symmetrical reflective housing allows for quick melting with low current requirements.
The flow control valve adjusts easily and you can rotate the valve rod through 360° for quick reseating.
We use this melting pot at Small Parts, Inc., to melt LMA ingots for use in bending Hypodermic Tubing.
The high capacity pot will hold 20 pounds of lead; and there is a 4" clearance below the spout.
Melting pots have a stable temperature range of approximately 450°F (232°C) at the low setting, to 900°F (482°C) at the high setting.
Holds 20 oz. liquid. 120 volt./700 watts.
MEP-20 ............................................................... $99.95
Approximate dimensions: 9-1/2" H × 9" D × 6-1/2" W. Weight: 4.5 lbs.
Note: When in use, we recommend keeping a minimum of 1" of melting materials to protect the heating coil.
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