N₂/H₂ protective atmosphere from ammonia crackers for bright annealing, carburizing, nitriding, and sintering. One gas source replaces bottled H₂ and N₂ mixtures.
75% H₂ + 25% N₂ reducing atmosphere removes surface oxides and prevents re-oxidation during heating and cooling cycles. Essential for bright annealing.
Metal emerges with bright, oxide-free surface. No pickling, grinding, or chemical cleaning required post-treatment. Saves 30%+ in finishing costs.
Ammonia cracking is the most economical way to produce H₂/N₂ atmosphere on-site. 55%+ cost reduction vs. delivered bottled H₂/N₂ mixtures.
Automatic monitoring and control of dissociated gas composition. ±2% H₂ concentration stability ensures repeatable heat treatment results.
Liquid NH₃ stored on-site
NH₃ → 75% H₂ + 25% N₂ at 850°C
Remove residual NH₃ to <10 ppm
Blend ratio & dew point monitoring
Continuous protective atmosphere
| Parameter | Value |
|---|---|
| Output Gas | 75% H₂ + 25% N₂ |
| Flow Range | 5–300 Nm³/h |
| Residual NH₃ | <10 ppm (standard) |
| Residual NH₃ | <1 ppm (with purifier) |
| Dew Point | −40°C to −60°C |
| Payback | 12–18 months |
Continuous annealing lines. Bright surface finish for deep-drawing quality strip.
Iron, steel, and stainless powder metal parts. Controlled carbon potential.
High-alloy tool steels. Precise atmosphere prevents decarburization.