CERROSAFE 7 Lb 7oz Total ingots Low Melting Tempature (281F) Alloy Bi/Sn/Ti/Cd

Description

Exact item shown, 6 ingots of CERROSAFE alloy. 7 pounds 7 oz total weight.  Detailed specs for all the alloys are here: http://www.csalloys.com/files/specifications.pdf
Note to me: 4th thin drawer
Originally made for toy soldier casting. Principal uses are in proof casting cavities (threads, dies, molds, blind holes) (E10); duplicate patterns in foundry matchplate making (F6); supporting workpieces while machining (B5); spray coating wood patterns, dental lab techniques (swaging jacket crowns); masks for electroplating and spray painting (E11).   Shrink Initially, Grows to .0000" in 1 Hour, so this alloy is often used for gunsmithing, to get an accurate measurement of your chamber.
Brownell's has a discussion of how to use CERROSAFE, here: https://www.brownells.com/userdocs/learn/bt002015.pdf
Hints For Using Cerrosafe
By: Mike Watkins
Recently, we’ve fielded a lot of questions on the Tech Help Lines about casting chambers using Cerrosafe casting metal. The following is some information about Cerrosafe that Cerro Metal Products has provided us with.
1 lb. Cerrosafe Ingot
“The basic ingredient of Cerrosafe is bismuth. Bismuth is a heavy, coarse, crystalline metal which expands when it solidifies, up to 3.3% of its volume. When bismuth is alloyed with other metals, such as lead, tin, cadmium and indium, this expansion is modified according to the relative percentages of bismuth and other components present. As a general rule, bismuth alloys of approximately 50% bismuth exhibit little change of volume during solidification.
Alloys containing more than this tend to expand during solidification and those containing less tend to shrink during solidification.”
What all this means for the gunsmith is that you can make chamber castings using only Cerrosafe and a few, simple hand tools. To make a chamber casting, first clean and degrease the chamber. Use a tight-fitting, cotton patch that’s wrapped around a bore mop or brush to plug the bore just ahead of the throat. I usually leave the cleaning rod attached to the plug until it’s time to remove the plug. Melt the entire bar of Cerrosafe in a heatproof container that you can easily pour the hot Cerrosafe out of. You can use a propane torch or heat over a hot plate or the burner of a stove. Cerrosafe melts easily at 158°-195° F. While the casting metal is still liquid, stir very well, skim off the dross and pour your chamber. The real trick with Cerrosafe is not to overheat it. If you heat the solid slowly, and keep it within the required temperature range, you shouldn’t get any dross.
Note the time the casting was poured. The casting will take only a very short time to solidify, usually within a minute. Wait 30 minutes and then remove the plug from the bore. Turn the muzzle upward and the casting will fall from the chamber. At 30 minutes after initial solidification, Cerrosafe shrinks slightly, so removal is very easy. Allow the new casting to cool thoroughly then measure the casting exactly one hour from the time it was cast. The casting will give you an exact measurement of the chamber. Cerrosafe casting metal can be used over and over. Remelt the entire amount back together and pour the Cerrosafe into a small mold of the appropriate size. Always melt the entire Cerrosafe ingot to make a chamber casting. For best results, never cut off, or use, just a part of the ingot.
Click Here to view 'bt002015.pdf' in another window.
General Characteristics
In addition to having low melting temperatures CS Alloys are virtually non-shrinking; several expand or grow after they are solid. All are relatively soft and brittle. Some, like CS Alloys, work soften. All have high density, averaging about three cu. ins. per pound. The numbers in parenthesis refer to other CS Alloys literature giving more details on the specific end use. Write for your copy.
2# Cakes
2# Slabs
3/16" U Bars
Special Shapes on Request
Wire
Typical End Uses
Melting Point - Degree F
Range (Degree F) (No definite melting point)
Melting Point - Degree C
Range (Degree C) (No definite melting point)
Growth or Shrinkage
After Casting
Weight Lbs./In.3
Tensile Strength Lbs./In.2
Brinell Hardness No.
Maximum Load 30 Seconds, Lbs./In.2
Safe Load Sustained Lbs./In.2
Electrical Conductivity Compared with pure cooper
Compositions (%)
Low 117 Alloy
X
X
X
X
No
Use in jigging or fixturing delicate parts for machining (honeycomb), (B5 Supp. 3); dental models, prosthetic development work; proof casting (internal measurements), (E10); fusible element in safety devices (E3); radiopaque contrast medium in X-Ray; low temperature solder (E9)
117
-
47.2
-
Initial Expansion. Shrinks to .0000" in 30 minutes
Stable in 2 hours at -.0002" Per Inch
.32
5400
12
-
-
3.34%
Bismuth: 44.7
Lead: 22.6
Tin: 8.3
Cadmium: 5.3
Indium: 19.1
Low 136 Alloy
X
No
X
X
No
Anchor parts for machining (jet blades), testing, inspection (A1); block lenses in optical manufacturing; proof casting (E10); fusible element in safety devices (sprinkler heads (E3); fusible cores in compound cores; low melt solder (E9); sealing adjustment screws.
136
-
57.8
-
Initial Expansion. .0000" in one Hour
Stable in 5 hours at -.0002" Per Inch
.31
6300
14
-
-
2.43%
Bismuth: 49.0
Lead: 22.6
Tin: 12.0
Indium: 21.0
Bend Alloy
X
X
X
X
1/8 & up
Anchor busings in drill jigs (A1); internal or external support of delicate parts for machining (B5); cores for spinning (B4); fusible mandrels in filament winding, fiber-glass lamination (C3); drop hammer and embossing dies (D6); tube bending filler (up to 1 3/4" diameter) (H3); heat transfer medium in processing plastics, chemicals, etc. (E4)
158
-
70
-
Rapid Immediate Growth
Maximum .0057" Per Inch
.339
5590
9.2
10,000
300
4.17%
Bismuth: 50.0
Lead: 26.67
Tin: 13.3
Cadmium: 10.0
Base Alloy
X
No
X
X
1/8 & up
Anchor: Cutlery handles, inserts in wood, metal, plastics (A1); metal parts in glass (Turflex® doors) (A1). Make fusible spinning chucks (B4); mandrels for electroforms (C1); drop hammer dies, stretch form blocks (D6); molds for plaster, plastics (G2); filler for tube bending (tubes over 1 3/4" diameter) (H3); hydrodynamic forming, seamless fittings; duplicate patterns in pottery and foundry (F6); liquid metal in autoclaves, heat treating (E4).
255
-
124
-
Initial Shrinkage Followed by Slow Growth
Maximum .0022" Per Inch
.380
6400
10.2
8,000
300
1.75%
Bismuth: 55.5
Lead: 44.5
Tru Alloy
X
X
X
X
0
Anchor: Shafts in permanent magnet rotors, locator members in aircraft assembly fixtures, metal parts in glass magnets in fixtures (A1). Make nests for parts in jigs and dial feed stations (B5); cores for electroforming (C1); embossing dies, form blocks (D6); joggle jaws; lost wax pattern dies, duplicate foundry patterns (F6); tracer models in profiling (F7). Molds: For plastics (G2); encapsulating (G6); forming sheet plastics (G2); plastic teeth, prosthetic development; potting electronic components (G6); low temperature solder (E9); laps for rifle barrels.
281
-
138
-
Net Expansion .0005" Per Inch
Maximum .0005" Per Inch
.315
8000
22
15,000
500
5.00%
Bismuth: 58.0
Tin: 42.0
Low 147 Alloy
X
No
X
X
0
(Note slightly lower melting temperature than Bend) Will function about as well for same uses if slight freezing range is not objectionable. Some success has been reported in lens blocking by optix manufacturers.
-
142-149
-
61-65
Rapid Immediate Growth
Maximum .0052" Per Inch
.342
4950
11
10,000
300
3.27%
Bismuth: 48.0
Lead: 25.6
Tin: 12.8
Cadmium: 9.6
Indium: 4.0
Safe Alloy
X
X
X
X
0
Originally made for toy soldier casting. Principal uses are in proof casting cavities (threads, dies, molds, blind holes) (E10); duplicate patterns in foundry matchplate making (F6); supporting workpieces while machining (B5); spray coating wood patterns, dental lab techniques (swaging jacket crowns); masks for electroplating and spray painting (E11).
-
158-190
-
70-88
Shrink Initially, Grows to .0000" in 1 Hour
Maximum .0025" Per Inch
.341
5400
9
9000
300
4.27%
Bismuth: 42.5
Lead: 37.7
Tin: 11.3
Cadmium: 8.5
Matrix Alloy
X
No
X
0
No
Originated by GE for anchoring punches in dies (A15); is used also to anchor: Non-moving parts in machinery, hold down bolts in concrete floors, locator parts in tooling docks (A1). Used in split jaw chucks, jigs, fixtures (B5); metal forming dies, form blocks, joggle jaws (D6); repairing broken dies (A15); filling blow holes in casting.
-
217-440
-
103-227
Rapid Initial Growth For 15 Hours
Maximum .0061" Per Inch
.343
13,000
19
16,000
300
2.57%
Bismuth: 48.0
Lead: 28.5
Tin: 14.5
Antimony: 9.0
Cast Alloy
X
X
X
X
0
Parallels TRU in its end uses also is preferred by some for electroforming mandrels, lost wax pattern dies due to greater dimensional accuracy; holding jet turbine engine blades for machining.
-
281-338
-
138-170
Maximum Shrinkage
Only -.0001" Per Inch
.296
8000
22
15,000
500
7.77%
Bismuth: 40.00
Tin: 60.00
I normally ship within 24 hours of your order, but the post office does not always initiate tracking when I put the packages in the drop off box.
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