[TheForge] Re: Burning Metal

Wed Nov 5 00:23:00 2003

Hi Ralph:
It depends on how much extra heat you need to sustain the cut, which is 
to say, how thick the cast iron is. My recollection is using 1/2" scrap 
to fuel  a cut in 3/4" cast iron and it was a ragged cut. Could be it is 
more controllable with practice....Pete F

Ralph Sproul wrote:

>Hi Pete, That's an interesting idea - I've never tried that, but would like
>to.  Do you use something light like 1/4" or does it take 1/2 to keep the
>oxidizing stream going?
>
>Ralph
>
>----- Original Message -----
>From: "Peter Fels And Phoebe Palmer" <[email protected]>
>To: <[email protected]>
>Sent: Monday, November 03, 2003 9:13 PM
>Subject: Re: [TheForge] Re: Burning Metal
>
>
>  
>
>>One can use a sacrifice piece of steel to sustain a torch cut  in cast
>>iron..carbon isn't the critical factor..plain iron seems to be...PF
>>
>>Andy Gladish wrote:
>>
>>    
>>
>>>>I think if the carbon content was the accelerating factor, cast
>>>>iron should
>>>>cut easily.
>>>>The  best I can do on cast iron with an O/A torch is a very sloppy cut.
>>>>My plasma torch however cuts it easily.
>>>>chuck-
>>>>
>>>>
>>>>        
>>>>
>>>I think that what is happening when I use an O/A torch to cut cast iron
>>>      
>>>
>is
>  
>
>>>that the preheat is melting the metal and the oxygen jet is blowing it
>>>aside. Way different from the sharp, clean cut (burn) I get with steel
>>>      
>>>
>when
>  
>
>>>things are set up correctly.
>>>So, a torch will 'cut' things that it can't 'burn'.
>>>Andy G.
>>>
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>
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