An oxygen acetylene torch flame is around 6000 degrees F. Oxygen Acetylene Torch Considering Steel melts at around 2800F that is pretty freakin hot!
You can make a lot of things happen with an oxygen acetylene torch kit. You can braze air conditioning line sets, solder copper water pipe, silver braze stainless steel, weld 4130 chromoly tubing, and even heat and bend metal thicker than 1 inch. But oxy-fuel torches can be extremely dangerous if not used properly. OSHA even requires employers to ensure workers that use oxyfuel equipment to be properly trained and qualified for oxy-fuel welding, cutting, heating, and brazing. (see 29 CFR 1910.252)
From my 30 plus years in the welding field, I am constantly surprised by the lack of training in the safe operation of oxyfuel equipment.. Even seasoned welders are often deficient in use of oxygen acetylene torches unless they have received hands-on training where demonstration of proficiency was required
Safe operation of oxygen acetylene equipment requires training, willingness to follow basic safety guidelines, and understanding some basic safety principles: