When used in the open air, a propane-oxygen torch reaches a maximum temperature of 3,623 degrees Fahrenheit or 1,995 degrees Celsius. Propane is a naturally-occurring hydrocarbon, a component of natural gas or crude oil.Click to see full answer. Considering this, what is the temperature of propane flame? Flame temperatures of common gases and fuels Gas / Fuels Flame temperature Propane in air 1980 °C 3596 °F Butane in air 1970 °C 3578 °F Wood in air (normally not reached in a wood stove) 1980 °C 3596 °F Acetylene in air 2550 °C 4622 °F Beside above, what temp does hydrogen burn at? Hydrogen gas forms explosive mixtures with air in concentrations from 4–74% and with chlorine at 5–95%. The explosive reactions may be triggered by spark, heat, or sunlight. The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). Consequently, how hot will a propane torch get metal? The process of melting metal will take much longer than most other projects as a propane torch can only reach a certain maximum temperature. The average melting point for most types of metals is around 1,800 degrees, and the maximum heat point for a propane torch is around 1,900 degrees.What is the hottest burning fuel?Dicyanoacetylene, also called carbon subnitride or but-2-ynedinitrile burns the hottest.