{"id":101258,"date":"2026-03-06T04:00:19","date_gmt":"2026-03-06T04:00:19","guid":{"rendered":"https:\/\/hdcmfg.com\/?p=101258"},"modified":"2026-02-26T05:17:26","modified_gmt":"2026-02-26T05:17:26","slug":"904l-stainless-steel","status":"publish","type":"post","link":"https:\/\/hdcmfg.com\/fr\/resources\/blog\/904l-stainless-steel\/","title":{"rendered":"Acier inoxydable 904L"},"content":{"rendered":"

Have you ever encountered 904L stainless steel in your experience? Do you know or have an idea what 904L stainless steel is? Regardless of your answer, we\u2019ll get you the information you need about SAE 904L in this article.<\/p>\n

We\u2019ll talk about what it is, why people choose it over other stainless steel types, what businesses and companies use it for, and more!<\/p>\n

What is 904L Stainless Steel?<\/h2>\n

\"tigesSource: Acier sp\u00e9cial Fushun<\/u><\/a><\/p>\n

904L stainless steel is a high-alloy austenitic stainless steel built for environments where corrosion is a real concern.<\/p>\n

It has higher amounts of nickel, chromium, and molybdenum, plus copper, to handle aggressive chemicals and acidic conditions usual stainless steels struggle with. This grade is easy to make, weld, and form, and it\u2019s non-magnetic in nature.<\/p>\n

\u00c0 lire \u00e9galement\u00a0: 321 Stainless Steel: Is It What You Need?<\/u><\/a><\/p>\n

Does Rolex Use 904L Stainless Steel?<\/h2>\n

\"904lSource: Time & Tide Watches<\/u><\/a><\/p>\n

Yes, they do. In fact, Rolex is a brand that takes pride in them using 904L in their watches. Dubbing it as Oystersteel, Rolex since used 904L in making their steel watches since the \u201880s because of its superb ability to withstand harsh conditions.<\/p>\n

904L Stainless Steel Characteristics, Properties, and More<\/h2>\n

To further understand and really know 940L stainless steel, we need to look at its properties. Let\u2019s start with its chemical composition.<\/p>\n

Composition chimique<\/h3>\n

Durabilit\u00e9 et r\u00e9sistance<\/h3>\n

Now, let\u2019s talk about its strength. 904L offers reliable strength for process equipment and pressure-related applications. Although its strength isn\u2019t its main selling point, 904L is chosen more for its longevity in corrosive and chemically-active environments than for load-bearing performance.<\/p>\n

Basically, it\u2019s not as strong as other grades, but it does just fine in regular or typical conditions.<\/p>\n

Densit\u00e9<\/h3>\n

The density of 904L stainless steel is about 7.9 g\/cm3. This density is usual for high-performing, high-alloy stainless steels. This gives it a solid feel without adding unnecessary weight to fabricated components.<\/p>\n

REMARQUE: <\/strong>Density is an important and factor and a \u201cgood-to-know\u201d because it helps people understand the logistics and performance of the material.<\/p>\n

R\u00e9sistance \u00e0 la corrosion<\/h3>\n

Corrosion resistance is the standout feature of this grade. 904L performs extremely well against uniform corrosion, pitting, and stress corrosion cracking<\/u><\/a>, especially in acidic and chloride-rich environments. It clearly outperforms other grades in its like, such as 316L in these conditions.<\/p>\n

R\u00e9sistance \u00e0 la temp\u00e9rature<\/h3>\n

904L handles moderate heat well and maintains good oxidation resistance. However, long-term use and exposure at very high temperatures (typically above 400\u00b0C) is not its purposeful or intended use. There are other grades good at that, but not 904L.<\/p>\n

En savoir plus: \u00c9tain contre aluminium\u00a0: une comparaison d\u00e9taill\u00e9e<\/u><\/a><\/p>\n

Soudabilit\u00e9 et usinabilit\u00e9<\/h3>\n

When people choose steel grades, two of the most important things to factor in would be their machinability and weldability. 904L stainless steel welds well using standard welding methods and, in most cases, does not need preheating or post-weld heat treatment.<\/p>\n

On the other hand, machining is more demanding because 904L work-hardens quickly due to its high nickel content. However, with sharp tools, steady feeds, and proper cooling, you can be sure that you\u2019ll be able to machine them for custom parts and precision components without major issues.<\/p>\n

Co\u00fbt<\/h3>\n

Last but most definitely not least is the cost. Understanding the cost is as important as knowing all the other factors, in itself because you\u2019ll be buying this in bulk and a small difference compounds.<\/p>\n

904L stainless steel is slightly more expensive than common grades like 304 or 316. Why? It\u2019s due to its alloy content and overall functionality. That higher cost is often justified in applications where corrosion failure would be far more expensive.<\/p>\n

Applications of 904L Stainless Steel: Where Can You Use Them?<\/h2>\n

\"904l<\/p>\n

Source: Stainless Sheets<\/u><\/a><\/p>\n

We know that one of the most common applications of 904L stainless steel is in the watches industry, but what else are they used for?<\/p>\n

You\u2019ll mostly see 904L stainless steel used in several environments including, but not limited to:<\/p>\n