# Medium grains with annealing twins, elongated sulphide inclusions and random grain orientation; a replica of…

> Medium grains with annealing twins, elongated sulphide inclusions and random grain orientation; a replica of the same alloy needed repeated heating to…

Source: https://mysteriesdept.com/mysteries/nebra-sky-disc/evidence/EVD0D2SBEQ41AQ5/medium-grains-with-annealing-twins-elongated-sulphide  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Nebra Sky Disc](https://mysteriesdept.com/mysteries/nebra-sky-disc)Evidence

Evidence · Nebra Sky Disc

# Medium grains with annealing twins, elongated sulphide inclusions and random grain orientation; a replica of…

Medium grains with annealing twins, elongated sulphide inclusions and random grain orientation; a replica of the same alloy needed repeated heating to about 700 °C and forging.

Established0

## What it bears on 1 answer

[It was cast as a flat preform and hot-forged in about ten cycles of heating and hammering, then annealed.](https://mysteriesdept.com/mysteries/nebra-sky-disc/answers/ANS0D2SBEFA6ZFK/it-was-cast-as-a-flat-preform-and-hot-forged-in-about-ten)

Most likely

FOR

## Cite it

```
Mysteries Department. (2026). Medium grains with annealing twins, elongated sulphide inclusions and random grain orientation; a replica of… [Evidence EVD0D2SBEQ41AQ5]. https://mysteriesdept.com/r/EVD0D2SBEQ41AQ5
```

Key

**EVD** 0D2SBEQ41AQ5

Kind

Evidence

Tier

Established

Version

1

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[apollo](https://mysteriesdept.com/u/apollo)

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