---
title: "Temper Embrittlement"
slug: "temper-embrittlement"
updated: 2026-10-27T23:12:43Z
published: 2026-10-27T23:12:43Z
canonical: "ims-handbook.cenosco.com/temper-embrittlement"
---

> ## Documentation Index
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# Temper Embrittlement

## Summary

Temper embrittlement is a loss of low temperature ductility after prolonged exposure to high temperatures exhibited by specific low alloy ferritic steels, containing high levels of residual elements. Temper embrittlement particularly affects 2.25Cr-1Mo and 3Cr-1Mo steels. More highly alloyed (e.g., 5Cr-0.5Mo and 9Cr-1Mo) and less highly alloyed (e.g., 1Cr-0.5Mo and 1.25Cr-0.5Mo) steels are less susceptible to temper embrittlement.

The loss in ductility due to temper embrittlement is apparent only at temperatures below approximately 150°C (300°F).

[PDF document](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/CEN.16.10668 - Temper Embrittlement.pdf?sv=2026-02-06&spr=https&st=2026-10-28T14%3A19%3A59Z&se=2026-10-28T15%3A19%3A59Z&sr=c&sp=r&sig=%2BizLGcoNptAcK5keYxtpdGbO2XQQCw0q5cLwkkNPw80%3D)