The temperature of a hydrogen furnace can vary depending on the specific application and materials being processed.
For brazing with hydrogen, the optimal temperature for copper is usually between 1,100 and 1,500℉ (593-816℃). The atmosphere within the furnace should be slightly positive when brazing with hydrogen.
When using hydrogen as a filler gas, it is important to heat the vessel above the autoignition temperature, which is around 932°F (500°C), to ensure the hydrogen is burnt in a controlled manner.
For lower-temperature processes where hydrogen properties are required, a nitrogen and hydrogen mixture with a maximum of 5% hydrogen can be used. At such low concentrations, hydrogen is not typically explosive. However, when working with gases that contain more than 5% hydrogen, a gas safety system is required to protect against explosions.
In the case of a hydrogen vacuum furnace, it is dedicated to annealing materials under a hydrogen and vacuum environment. The maximum temperature for this furnace is 1000℃ (1832℉). Ultra-high purity hydrogen and argon gases are available for annealing processes, with flow rates controlled in the range of 0-100 sccm for hydrogen and 0-1000 sccm for argon.
For hydrogen annealing furnaces in general, the temperature can be as high as the melting point of molybdenum, which is 2630℃ (4766℉). These furnaces use hydrogen or a mixture of hydrogen and nitrogen (with hydrogen content >5%) as a protective atmosphere.
In powder metallurgy sintering processes, hydrogen gas is widely used as a non-air atmosphere for high-temperature sintering. The sintering temperature in pure hydrogen typically ranges from at least 1300℃ (2372℉) to up to 1600℃ (2912℉) for specialized alloys.
Overall, the temperature of a hydrogen furnace can vary depending on the specific application, materials, and processes involved.
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