# case hardening

> heat treatment of steel

**Wikidata**: [Q1205902](https://www.wikidata.org/wiki/Q1205902)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Case-hardening)  
**Source**: https://4ort.xyz/entity/case-hardening


## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. National Library of Israel Names and Subjects Authority File
3. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)