TRACK: Emerging Technologies
The newly developed Ni-based alloy N06699 has been designed for high-temperature applications in the chemical and petrochemical industry, exhibiting an excellent resistance under metal dusting conditions due to the high Cr (approx. 30 wt.%) and Al (approx. 2 wt.%) content and the reduced Fe content (< 2.5 wt.%). The corrosion performance in these aggressive conditions has been proven in several metal dusting experiments, not only for the base material (plate and bar) but also for welded and printed samples from powder via PBF-LB/M. Recently, long-term experiments with a duration of up to 10,000 h verified again the outstanding metal dusting resistance of this Ni-based alloy and thus its suitability for high-temperature applications. In addition, ASME allowable stresses have been developed recently for BPV Code Case VIII Div. 1 up to 800°C/1500°F based on creep tests on bar and plate material and seamless tubes. These values are crucial for high-temperature applications and are in the range of N06601.