Chamber Casting Alloy Ingot aka low 158-190F
- in stock
- 1.00 LBS
- Calculated at Checkout
Bulk discount rates
Below are the available bulk discount rates for each individual item when you purchase a certain amount
|Buy 14 - 49||and get 5% off|
|Buy 50 - 99||and get 7% off|
|Buy 100 or above||and get 9% off|
Sold by the ingot. Ingot weighs approximately 1 pound.
Rotometals Chamber Alloy (158-190) is the best known material from which to make a casting of the chamber and throat of a firearm to determine caliber or check the dimensions. It melts at a temperature just above M & M's, so all you need is a propane torch and a bullet casting ladle. It can also be used to make a cast of a dovetail slot or any other hard to measure area. Also, it is great for removing the front half of a case from the chamber, in the event of case head separation; and lots of folks cast a small portion of the barrel to determine bore diameter. For best results, measure the casting one hour after casting. Contains 42.5% Bismuth, 8.5% cadmium, 37.7% lead, 11.3% Tin.
MEASUREMENTS 2.25" x 2.25" x .75"
- Plug the bore immediately ahead of the throat of the chamber using a small cleaning patch.
- Pour the alloy directly into the chamber until full and allow Melting Point to cool, it will turn a shiny silver color. As soon as it has cooled enough that it is no longer a liquid (and doesn't present a burn hazard), remove it from the chamber. Take care not to overfill the chamber as the alloy will then run into the locking lug area, making removal extremely difficult.
- During the first 30 minutes of cooling cerrosafe shrinks. At the end of one hour it should be "exactly" chamber size.
- Melts between 158 and 190 degrees Fahrenheit
- Should be melted in a clean iron ladle without direct flame on the product.
- The chamber being cast should be cleaned thoroughly and a thin coat of oil or graphite applied.
Contraction expansion factor versus time, measured in inch per inch compared to cold mold dimensions. Test Bar x 10 (Below measurements are x/10,000ths of an inch. ex: 0.0025" is 25/10,000ths of an inch)
- 2 minutes - .0004"
- 6 minutes - .0007"
- 30 minutes - .0009"
- 1 hour + .0000"
- 2 hours + .0016"
- 5 hours + .0018"
- 7 hours + .0019"
- 10 hours + .0019"
- 24 hours + .0022"
- 96 hours + .0025"
- 200 hours + .0025"
- 500 hours + .0025"
Price Per Pound:
I used this to cast a pyrite crystal to make a detector for a crystal radio I am making. I melted the alloy in a copper plumbing end cap using a heat gun and placed the crystal on top of the molten metal. The detector brought in a very strong signal.
This alloy is ideal for making replicas of antique s that are missing metal parts. A mold can be made from parts to be replicated by using epoxy. The melting temperature of this alloy does not affect the mold.
Works just as good as i could expect. Was much more attractively priced than many alternatives.
Worked great! Timely delivery. I’m pleased!
Clean metal, fast service, excellent communication.
A speedy doorstep delivery in my case VIA FedEx as I live way up in the Sierra Nevada Mountains West of Yosemite National Park. All Items ordered were well packaged and were remarkably accurate as to their advertised weight. I had spent a good deal of time browsing the Rotometals Web page where found a treasure-trove of valuable data on their products. Highly recommended and I will continue to do business with them.