Hillbilly iron Posted December 4, 2009 Share Posted December 4, 2009 At what temperature would a small gas forge get up too. Thankyou in Advance Quote Link to comment Share on other sites More sharing options...
Jack Evers Posted December 4, 2009 Share Posted December 4, 2009 It's been a while since I made the calculations, but the theoretical temp for combustion of propane is around 2400 degrees F. Depending on the lineing and air mix you should expect 2300 plus or minus. As I say, I'm trying to recall, so I don't mind being corrected. Quote Link to comment Share on other sites More sharing options...
pkrankow Posted December 4, 2009 Share Posted December 4, 2009 (edited) Flame Temperatures some Common Gases 1980 degrees Celsius = 3596 degrees Fahrenheit This is the theoretical limit assuming perfect insulation, optimal fuel/air mixture and no other losses. 2000-2500 are reasonable real world results for home made forges, depending on burner size, fuel pressure, insulation, insulated cavity size, and opening size(s). I think a good design can achieve 3000F or better without epic effort. Phil PS, this is using numbers for Propane Edited December 4, 2009 by pkrankow Quote Link to comment Share on other sites More sharing options...
Rich Hale Posted December 4, 2009 Share Posted December 4, 2009 This is really not a question that can be answered. Think of it like aksing how much does a ford vehicle weigh. If you were more specific about what kind of forge, what kind of fuel, how big, what kind and how much insulation and what kind and how many burners if it is a gasser, and maybe evenmore specific if it exists and does not meet your needs, fill in the above blanks and let us know what kind of problems you aer haveng with it and I bet someone with forge eqqpeience may be able to give you a better answer. Quote Link to comment Share on other sites More sharing options...
pkrankow Posted December 4, 2009 Share Posted December 4, 2009 You are right Rich, and I should have specified that I used the number for Propane. Phil Quote Link to comment Share on other sites More sharing options...
Nakedanvil - Grant Sarver Posted December 4, 2009 Share Posted December 4, 2009 I've seen claims by people with atmospheric forges that they get 2300 – 2400F checking with a pyrometer. And then they say “See, it gets to welding temperature”! I've checked my forced air forges with a properly calibrated optical pyrometer and the results I get running at what I consider a “welding heat” were 2800 – 3000F. Given that heat transfer is a function of the square of the temperature difference between the two bodies, I can get my parts to welding heat a whole lot faster. That is very important in forge welding. Waiting and waiting and waiting for a piece to get to equilibrium with the forge makes welding much more difficult. On the downside, I always had to use 3200 degree refractory. Quote Link to comment Share on other sites More sharing options...
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