It was my second attempt at making a heat treat oven, this time I decided to make it more powerful. Used better isolation materials and made thicker heating coils. Results of this combination is that this oven reaches 800°C in less than 7 minutes, for comparison previews one needs for almost 3 hours.
Below I made a material list, let me know in the coment's section if I missed something or if you want some more details in any aspects.

Main material list:
- Aerated concrete 600 kg/m3
- IFB 23 Bricks
- Mortar Silcas M
- Kanthal A1 wire (1,2mm, 10m)
- Thermocouple type k
- Fuse 16A
- Transmit G7
- SSR 25

Performance:
800°C (1472°F) → 6.38 minutes
900°C (1652°F) → 10.10 minutes
1000°C (1832°F) → 15.45 minutes
1100°C (2012°F) → 25.09 minutes

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