I have a smith brother who's making swords and other art steel pieces, and he is needing a heating oven with a precise heat regulation at high heat.

- The objectives : power source : 230/400 V, 3 phases with neutral 50 Hz (why not 60 Hz !)

- Power : over 7 kW (10 Arms by phase)

- Heat : 1100 - 1200 °C

- Precision of regulation : +/- 5 °C (needed to harden some stainless steel).

the regulation point should be between 700 and 1000 °C

take a look at the organigram linked.