---
title: "Sigma Phase Embrittlement"
slug: "sigma-phase-embrittlement"
updated: 2026-10-27T23:12:43Z
published: 2026-10-27T23:12:43Z
canonical: "ims-handbook.cenosco.com/sigma-phase-embrittlement"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://ims-handbook.cenosco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sigma Phase Embrittlement

## Summary

Embrittlement refers to an upward shift of the low temperature ductile-to-brittle transition temperature in a material. Most austenitic and duplex type steels normally do not have such a ductile-to-brittle transition. However, under certain conditions such steels can also become brittle.

Degradation module “CEN.16.11753 - High Temperature Corrosion and Degradation” also addresses this damage mechanism, in lesser detail.

[PDF document](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/CEN.16.10663 - Sigma Phase Embrittlement(1).pdf?sv=2026-02-06&spr=https&st=2026-10-28T13%3A37%3A35Z&se=2026-10-28T14%3A37%3A35Z&sr=c&sp=r&sig=obpuNNcSp%2B%2F0%2BwST%2FoV5HlRbK85QNdqbUKyaAhHhTCA%3D)