Copper now liquid

Scabble??

 

Each post in the thread has a number, down in the lower right corner. This one is #22
In post #7, there is a picture of a typical Amazon/Vevor type gauge
In post #9, there are some Scrabble (scabble) pictures along with the tongs and a Devil Forge gauge

 

Thanks Tops, yes Scrabble Word Game. Where is auto correct when you need it?

 

thank you

 

Well, to my experience, when keeping oxygen away from copper by using charcoal floating on the Cu bath as Jammer says, it is very fluid and pours easily. Much better that the very drossy brass. Bronze (with tin or silicon) also works well.

 

If you have drossy Brass your doing something VERY Wrong. probable starting with dirty metal, or melting way too slow

V/r HT1

 

I have some crucibles that are bottom pour, a tube goes down to the bottom. Would these be good for copper?

 

You mean like ladles in the steel industry with a valve in the bottom controlled by the tube you mentioned which opens when the steel is to be poured and that for (and much smaller scale) copper ?
Not easy to make.
Like this:

 

Do you wait until you're done melting what you're going to melt, then add the charcoal on top? Or do you add it as you go along? Do you have to wait until it burns off before pouring, or...? Sorry, just trying to visualize the process. Perhaps I'm overthinking it. I like this idea, as I've been told phosphor copper granules/copper shot is good, but I can't seem to find it in quantities less than 5 pounds... Too much, and way too expensive, LOL!

 

I have used the copper brazing rod as a substitute for phosphor/copper shot. Same metal, just not as much phosphorous content. It is hard for me to tell if it made any difference or not as I only melt bronze, which has little problems with oxidation, and mostly melt Everdur, which has basically no problem with it.

The brazing rod is this:



Richard

 

can you share a link the picture doesnt tell me enough to try it out, I'm almost out of Phos copper and have to cast a couple of pieces and it would be nice to have a backup


Thanks in advance
HT1

 

The brazing rod is made for brazing copper and its alloys. There are several alloys, and several manufacturers. I use Harris as their web site is clear and comprehensive. The Harris 0 (zero) indicates zero percent silver. They make it also with silver in various formulations up to 15% for increased flow and gap fill characteristics.

Here is the link to the tech data sheet:

https://ch-delivery.lincolnelectric...t/07a047c58c50429f860f053f51743364?v=3c1039e8

and to the Harris brazing rod page:

https://www.harrisproductsgroup.com/en/Products/Brazing-Soldering-Fluxes/Brazing-Alloys

Richard

 

Thank you very Much Richard, definitely a great option available on Amazon
https://www.amazon.com/Harris-0620F1-Silver-PhosCopper-Brazing/dp/B002BY8K6Y

The Bad it's 7% Phos Cu, for $22/Lb

Belmont sells 15% Phos Cu for $19/lb
https://www.belmontmetals.com/product/15-phosphor-copper/


I Know a lot of our Non US folk mayn't be able to use Belmont or shipping may become an issue, but if you need Phos Cu belmont is a better deal, which I was hoping was not the case I need to raise my prices


V/r HT1

 

Thanks for the info! Perhaps the picture on Amazon is deceptive. It looks like a burly rod on that site, was just wondering how I'd add it to my melt (cut a piece off and drop it in, stir it around, let some melt?). If it's really a lot smaller, I imagine I'd just cut and drop in. Does seem like an expensive option though, perhaps for special use and not when just making bars and coins...

So, was curious after posting on Monday, and did another melt. Dropped in a piece of lump charcoal on top, and it just bobbed there. Was amazed it didn't just burst into flames with the heat. Didn't seem to make much difference, but didn't wait a long while before pouring.