> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/e3d-user-manual/interface/toc175916526/steel-design2/steel-materials.md).

# Steel Materials

How to define yield and rupture stress properties for steel materials prior to steel design.

Steel Design > Steel Materials prompts you with the following dialog.

![](https://560001759-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FWNe8U6EBBBdUJHdb2X9G%2Fuploads%2Fgit-blob-d7b59e3d53a866d5258d2d82e2aca3f1ef30c0b9%2FSteel%20Materials.jpg?alt=media)

It allows you to define steel strength properties for the existing materials. The strength properties include:

* Steel yield stress Fy
* Steel rupture stress Fu

If standard materials are used in Tables > Material Data, these strength properties will be set automatically. You may override these properties prior to performing steel design. No steel design will be performed on a member if its modulus is not close (within 10%) to 29E3 ksi. You should not modify materials that are not steel on this dialog.


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