I'd like to try my hand at forge welding (possibly in the form of a hawk) but I'm not sure my forge will get up to heat. The forge I have I built off a tutorial by Chris Anderson and it does get to a bright yellow hot. Thing is, from what I've heard (please correct me if I'm wrong) welding temperature is about 1800 Fahrenheit or so, and I have no idea how to convert color to number. I've seen a couple heat charts, but they seem to vary a bit and I'm not sure which is best. So are there any reliable charts that I can compare to temporarily (that is until I get used to knowing right off the bat what color = what temperature)?