---
type: "WebPage"
title: "Ferrite testing in laboratory"
description: "Would you like to realise a ferrite testing of your steels and steel alloys? What is the ferrite content of a steel? The ferrite content is the proportion of ferritic phase present in a stainless steel or metal alloy. It..."
resource: "https://filab.fr/en/our-services/our-analysis-services/metallurgical-analysis-laboratory/ferrite-testing/"
tags: ["EN", "pll_67c1cc949acaa", "Arnaud JOUDRAIN Meta"]
timestamp: "2026-04-22T07:47:44Z"
published: "2025-02-28T15:19:02Z"
language: "en"
author: "Laure Durieux"
---

# Ferrite testing in laboratory

## Would you like to realise a ferrite testing of your steels and steel alloys?

### What is the ferrite content of a steel?

The **ferrite content** is the proportion of ferritic phase present in a stainless steel or metal alloy. It is generally expressed as a percentage (%) or as a **ferrite number (FN)** and plays a crucial role in the mechanical properties and [corrosion resistance](https://filab.fr/en/our-services/our-expertise-services/laboratory-analysis-deposit-contamination/corrosion-resistance-testing.md) of materials.

**Ferrite testing** content mainly concerns **stainless steels and their alloys**, but it can also be relevant for other metallic materials containing ferritic phases.

## The FILAB laboratory helps manufacturers in ferrite testing

### Why choose FILAB to realise a ferrite testing?

The FILAB laboratory has recognised expertise in metallurgy and materials science. As an independent laboratory, FILAB guarantees objective and reliable results. Our state-of-the-art analytical equipment enables us to carry out precise measurements tailored to each need. Our approach is tailored to your industrial and regulatory requirements. What’s more, our optimal responsiveness means we can guarantee short analysis times and tailor-made support for ferrite testing and support for measuring the ferrite content in your steels and steel alloys.

  ressources
## FERRITE - Ferrite testing

 At the FILAB laboratory, we have the most advanced techniques for accurately assessing the ferrite content of your samples: XRD
[XRD analysis](https://filab.fr/en/our-technical-resources/x-ray-crystallography-laboratory-xrd.md)

 SEM-EDX
Microscopic observation and analysis of the microstructure of materials using [SEM-EDX](https://filab.fr/en/our-technical-resources/laboratory-analysis-sem-scanning-electron-microscopy.md)

### Why realise a ferrite testing ?

The **ferrite content has a direct influence on the functional properties of the steel** – its elasticity, hardness, weldability and magnetism.

Ferrite content is a key parameter in metallurgy, particularly for :

 Ensuring mechanical strength
The right ferrite content improves strength and reduces the risk of hot [fissuration](https://filab.fr/en/our-services/our-expertise-services/laboratory-analysis-failures/fissure-analysis-laboratory.md).

 Optimise corrosion resistance
Too low a ferrite content can make the material more sensitive to aggressive environments.

 Improving weldability
In austenitic stainless steels, a certain level of ferrite in the welds limits the risk of fissuration.

 Resist high temperatures
In some applications, excessive ferrite can lead to hot embrittlement (sigma phase).

### Our accreditations

 ![](https://filab.fr/wp-content/uploads/2025/11/ESSAI-Logo-COFRAC.jpg)
The FILAB laboratory is accredited by COFRAC (French Accreditation Committee) – Laboratories section – for its departments in Chemistry, Metallurgy, Organic Chemistry, Chemical Expertise, Materials Expertise, and Environment in the following fields: 

✔️ Physicochemical analysis of metallic materials
✔️ Physicochemical analysis of cosmetic and pharmaceutical products
✔️ Physicochemical analysis of medical devices, medical equipment, and chemical and biological products

Scope available No. 1-1793

This [Nadcap accreditation](https://filab.fr/en/about-us/accreditations-en/materials-testing-nadcap-laboratory.md) notably covers:
✔️ Chemical analysis (ICP-OES) of critical metallic alloys (Al, Fe, Ni, Ti)
✔️ Metallography

An international recognition that confirms our commitment to quality and reliability for the most demanding applications, particularly in the aerospace sector.

 ![](https://filab.fr/wp-content/uploads/2026/04/PNG-bleu-e1775737225243-1024x446.png) [Explore our accreditations](https://filab.fr/en/about-us/accreditations-en.md)