[Shop-talk] Annealing Copper bars

[John Innis]

The oven would work fine, you just need to add a quench as soon as possible
when you come out.

On Sat, Aug 8, 2020 at 10:43 AM Pat Horne <patintexas at icloud.com> wrote:

> So, referring back to the OP about using the oven to anneal the bars, it
> WOULDN’T be a good choice.
>
> Peace,
> Pat
>
> Pat Horne
> We support Habitat for Humanity
>
>
> On Aug 8, 2020, at 10:03 AM, John Innis <jdinnis at gmail.com> wrote:
>
> 
> This matches my understanding as well.  Brass and copper soften when
> quenched.  Steel and Aluminum harden when quenched.
>
> On Sat, Aug 8, 2020 at 9:59 AM Bob Spidell <bspidell at comcast.net> wrote:
>
>> Could be (the plot thickens):
>>
>> "Annealing copper makes it softer and less brittle, which allows you to
>> bend it without breaking it. This malleability allows you to hammer and
>> mold the copper into any shape you wish without cracking the metal. You
>> can anneal any grade and thickness of copper as long as you have a flame
>> that can transmit enough heat to the metal. The most straightforward way
>> to anneal copper is by heating it with an oxygen acetylene torch and
>> rapidly cooling it in water."
>>
>> https://www.wikihow.com/Anneal-Copper
>>
>>
>>
>> On 8/8/2020 7:43 AM, Pat Horne wrote:
>> > Maybe you’re right & I’m wrong! Wouldn’t be the first time.
>> >
>> > Peace,
>> > Pat
>> >
>> > Pat Horne
>> > We support Habitat for Humanity
>> >
>> >
>> > On Aug 8, 2020, at 9:33 AM, Bob Spidell <bspidell at comcast.net> wrote:
>> >
>> > Well snap. I've been doing it wrong all these years I've reused
>> copper, mostly on sealing washers for oil pan plugs.
>> >
>> > Thanks for the reply.
>> > Bob
>> >
>> >
>> >> On 8/8/2020 7:21 AM, Pat Horne wrote:
>> >> I thought quenching made the metal less soft.
>> >>
>> >> Annealing requires slow cooling.
>> >>
>> >> Peace,
>> >> Pat
>> >>
>> >> Pat Horne
>> >> We support Habitat for Humanity
>> >>
>> >>
>> >> On Aug 8, 2020, at 9:18 AM, Bob Spidell <bspidell at comcast.net> wrote:
>> >>
>> >>  Question for the List: Is it proper to quench--in water, presumably,
>> or oil maybe--copper to achieve softness after it's been heated 'cherry
>> red?'
>> >>
>> >> Bob
>> >>
>>
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>
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