- Neutral Flame (Equal oxygen and acetylene – 1 : 1)
- Temperature: ~3200°C
- Used for mild steel, stainless steel, aluminum, and copper.
- Carburizing Flame (Excess acetylene)
- Low-temperature flame (~3000°C) with a yellowish tip.
- Used for welding high-carbon steel and certain non-ferrous metals.
- Oxidizing Flame (Excess oxygen)
- High-temperature flame (~3500°C) with a shorter, bluish-white inner cone.
- Used for welding brass and copper.
