coffee-forum.net
Promoting coffee discussion.

Main
Date: 09 Dec 2006 08:14:43
From: Michael Horowitz
Subject: Metals to avoid?
If I'd like to build a cylinder for roasting over the BBQ grill, are
there any metals that should be avoided? - Mike




 
Date: 11 Dec 2006 00:54:53
From: Ed Needham
Subject: Re: Metals to avoid?
The one most common mistake I see drum builders making is to use galvanized
material where it can erode and contaminate the beans. Galvanized is not
approved by NSF or any other standards organization that I know of for
contact with food in machinery design.
I prefer stainless, but plain steel or cast metal works fine.
--
*********************
Ed Needham®
"to absurdity and beyond!"
http://www.homeroaster.com
(include [FRIEND] in subject line to get through my SPAM filters)
*********************

"Michael Horowitz" <mhorowit@cox.net > wrote in message
news:ojdln2hjifdf03m5i76lh208ucja04s512@4ax.com...
> If I'd like to build a cylinder for roasting over the BBQ grill, are
> there any metals that should be avoided? - Mike




 
Date: 10 Dec 2006 04:04:03
From: Dan
Subject: Re: Metals to avoid?

Dan Bollinger wrote:

> > mercury?
>
> A solid at roasting temps? Not.

that's one reason not to use it - another being it's poisonous!

>
> > Hydrogen?
>
> A metal? Not.
>

One of my science teachers once argued that it should be classed as a
metal!


> > Caesium?
>
> Born in Britain? Cesium.
>
yup - born in britain!



 
Date: 09 Dec 2006 19:03:44
From: Flasherly
Subject: Re: Metals to avoid?

Dan Bollinger wrote:
> > In ch 1996, however, a group of scientists at Lawrence Livermore
> > National Laboratory reported that they had serendipitously produced,
> > for about a microsecond and at temperatures of thousands of kelvins
> > and pressures of over a million atmospheres, the first identifiably
> > metallic hydrogen, ending the 60-year search.
>
> But not at STP, right? ;)

Find that on second tier kets today, like BigLots and DollarGeneral,
but not Lucas -

http://www.lucasoil.com/



  
Date: 10 Dec 2006 09:15:25
From: Dan Bollinger
Subject: Re: Metals to avoid?

"Flasherly" <gjerrell@ij.net > wrote in message
news:1165719824.582369.184200@16g2000cwy.googlegroups.com...
>
> Dan Bollinger wrote:
>> > In ch 1996, however, a group of scientists at Lawrence Livermore
>> > National Laboratory reported that they had serendipitously produced,
>> > for about a microsecond and at temperatures of thousands of kelvins
>> > and pressures of over a million atmospheres, the first identifiably
>> > metallic hydrogen, ending the 60-year search.
>>
>> But not at STP, right? ;)
>
> Find that on second tier kets today, like BigLots and DollarGeneral,
> but not Lucas -

STP, Standard Temperature and Pressure, i.e. ambient




 
Date: 09 Dec 2006 13:58:50
From: Dan
Subject: Re: Metals to avoid?

Michael Horowitz wrote:

> If I'd like to build a cylinder for roasting over the BBQ grill, are
> there any metals that should be avoided? - Mike

mercury?
Hydrogen?
Caesium?



  
Date: 09 Dec 2006 19:13:52
From: Dan Bollinger
Subject: Re: Metals to avoid?
> mercury?

A solid at roasting temps? Not.

> Hydrogen?

A metal? Not.

> Caesium?

Born in Britain? Cesium.



D


   
Date: 10 Dec 2006 00:46:47
From: I->Ian
Subject: Re: Metals to avoid?
On Sat, 9 Dec 2006 19:13:52 -0500, "Dan Bollinger"
<danNObollinger@insightSPAMbb.com > wrote:

>
>> Hydrogen?
>
>A metal? Not.

In ch 1996, however, a group of scientists at Lawrence Livermore
National Laboratory reported that they had serendipitously produced,
for about a microsecond and at temperatures of thousands of kelvins
and pressures of over a million atmospheres, the first identifiably
metallic hydrogen, ending the 60-year search.


    
Date: 09 Dec 2006 20:00:24
From: Dan Bollinger
Subject: Re: Metals to avoid?
> In ch 1996, however, a group of scientists at Lawrence Livermore
> National Laboratory reported that they had serendipitously produced,
> for about a microsecond and at temperatures of thousands of kelvins
> and pressures of over a million atmospheres, the first identifiably
> metallic hydrogen, ending the 60-year search.

But not at STP, right? ;)


     
Date: 10 Dec 2006 01:14:53
From: I->Ian
Subject: Re: Metals to avoid?
On Sat, 9 Dec 2006 20:00:24 -0500, "Dan Bollinger"
<danNObollinger@insightSPAMbb.com > wrote:

>> In ch 1996, however, a group of scientists at Lawrence Livermore
>> National Laboratory reported that they had serendipitously produced,
>> for about a microsecond and at temperatures of thousands of kelvins
>> and pressures of over a million atmospheres, the first identifiably
>> metallic hydrogen, ending the 60-year search.
>
>But not at STP, right? ;)

I was thinking I have a couple of old beans that I'd like to try at
the conditions required for the metal hydrogen. Nothing else has
worked thus far <vbg >


      
Date: 09 Dec 2006 19:21:11
From: DougW
Subject: Re: Metals to avoid?
> On Sat, 9 Dec 2006 20:00:24 -0500, "Dan Bollinger"
> <danNObollinger@insightSPAMbb.com> wrote:
>
>>> In ch 1996, however, a group of scientists at Lawrence Livermore
>>> National Laboratory reported that they had serendipitously produced,
>>> for about a microsecond and at temperatures of thousands of kelvins
>>> and pressures of over a million atmospheres, the first identifiably
>>> metallic hydrogen, ending the 60-year search.
>>
>> But not at STP, right? ;)
>
> I was thinking I have a couple of old beans that I'd like to try at
> the conditions required for the metal hydrogen. Nothing else has
> worked thus far <vbg>

For purposes of having nothing else quite better to do, how long do
you think it would take to first crack or would the speed of sound
make the question moot? Cherenkov radiation? Woud the beans lase?

--
DougW




       
Date: 10 Dec 2006 01:32:03
From: I->Ian
Subject: Re: Metals to avoid?
On Sat, 9 Dec 2006 19:21:11 -0600, "DougW"
<post.replies@invalid.address > wrote:

>> On Sat, 9 Dec 2006 20:00:24 -0500, "Dan Bollinger"
>> <danNObollinger@insightSPAMbb.com> wrote:
>>
>>>> In ch 1996, however, a group of scientists at Lawrence Livermore
>>>> National Laboratory reported that they had serendipitously produced,
>>>> for about a microsecond and at temperatures of thousands of kelvins
>>>> and pressures of over a million atmospheres, the first identifiably
>>>> metallic hydrogen, ending the 60-year search.
>>>
>>> But not at STP, right? ;)
>>
>> I was thinking I have a couple of old beans that I'd like to try at
>> the conditions required for the metal hydrogen. Nothing else has
>> worked thus far <vbg>
>
>For purposes of having nothing else quite better to do, how long do
>you think it would take to first crack or would the speed of sound
>make the question moot? Cherenkov radiation? Woud the beans lase?

Dusting off the old slide rule, I estimate cracks 1 though 28 to be
inaudible, the roast proceeding immediately to "Crack 29"


 
Date: 09 Dec 2006 08:42:07
From: Hunter
Subject: Re: Metals to avoid?

Michael Horowitz wrote:
> If I'd like to build a cylinder for roasting over the BBQ grill, are
> there any metals that should be avoided? - Mike

Almost any common metal could be used. I think the biggest issue would
be the material's ability to evenly heat the roasting surface.
Materials like stainless are going to give a little less even heat
distribution because of poor thermal conductivity. The more pure the
alloy is, the better it is going to conduct the heat. Carbon Steel
will give better heat distribution that SS, but then you have to worry
about a) corrosion and b) cleaning (since carbon steel is slightly
porous, unlike SS). Ideally, we would all be cooking with pure metals
like copper or simple allows like brass, but the price difference
rarely is worth the gain. Aluminum distributes heat well, but I would
use a high grade alloy for cooking, which has the price issue again. I
don't know how big you are talking about making the thing though....



 
Date: 09 Dec 2006 09:36:20
From: yetanotherBob
Subject: Re: Metals to avoid?
There are probably more to avoid, for various reasons of toxicity and/or
durability, than there are to be recommended. I'd stick with a good
grade of stainless steel. The dealer at this link sells prefab drums
that, if you haven't already, you could look at for ideas on making your
own:

http://www.rkdrums.com/products.htm

Bob
===================
In article <ojdln2hjifdf03m5i76lh208ucja04s512@4ax.com >,
mhorowit@cox.net says...
> If I'd like to build a cylinder for roasting over the BBQ grill, are
> there any metals that should be avoided? - Mike
>


  
Date: 09 Dec 2006 10:44:06
From: Dan Bollinger
Subject: Re: Metals to avoid?
> I'd stick with a good grade of stainless steel.

LOL! There are BAD grades of SS? Which are they? ;) Dan


   
Date: 09 Dec 2006 08:00:44
From: Roger Shoaf
Subject: Re: Metals to avoid?

"Dan Bollinger" <danNObollinger@insightSPAMbb.com > wrote in message
news:asadnb-havuHR-fYnZ2dnUVZ_vqpnZ2d@insightbb.com...
> > I'd stick with a good grade of stainless steel.
>
> LOL! There are BAD grades of SS? Which are they? ;) Dan

While perhaps not "bad" grades, there are lots of types that may be
inappropriate. Some alloys may be leaded for example to increase
machinability, but you really don't want lead in your coffee. Some grades
might be good for making scalpel blades, but would be a real pain to form
into a coffee roaster.

--
Roger Shoaf
If you are not part of the solution, you are not dissolved in the solvent.




  
Date: 09 Dec 2006 10:36:28
From: Michael Horowitz
Subject: Re: Metals to avoid?
Thanks for the link - MIke

On Sat, 9 Dec 2006 09:36:20 -0500, yetanotherBob
<yetanotherbob@gmail.com > wrote:

>There are probably more to avoid, for various reasons of toxicity and/or
>durability, than there are to be recommended. I'd stick with a good
>grade of stainless steel. The dealer at this link sells prefab drums
>that, if you haven't already, you could look at for ideas on making your
>own:
>
>http://www.rkdrums.com/products.htm
>
>Bob
>===================
>In article <ojdln2hjifdf03m5i76lh208ucja04s512@4ax.com>,
>mhorowit@cox.net says...
>> If I'd like to build a cylinder for roasting over the BBQ grill, are
>> there any metals that should be avoided? - Mike
>>



 
Date: 09 Dec 2006 09:24:15
From: Dan Bollinger
Subject: Re: Metals to avoid?
> If I'd like to build a cylinder for roasting over the BBQ grill, are
> there any metals that should be avoided? - Mike

Rather than list what to avoid, the list is long including Cadmium, Uranium,
just use any steel or stainless steel. Dan