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904l Stainless Steel Round Bar

904L stainless steel round bar is a high-alloy austenitic stainless steel designed for extreme corrosion environments. Compared with standard 300 series

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Product Details

904L Stainless Steel Round Bar: Performance Breakdown and Common Applications

904L stainless steel round bar is a high-alloy austenitic stainless steel designed for extreme corrosion environments. Compared with standard 300 series stainless steels such as 304 and 316, 904L contains higher levels of nickel, chromium, and molybdenum, giving it superior resistance to strong acids, chloride attack, and pitting corrosion.

It is widely used in chemical processing, offshore engineering, and high-corrosion industrial systems where standard stainless steels cannot provide sufficient service life.

1. 904L Stainless Steel Chemical Composition (Performance Basis)

Element	Typical Content (%)	Function
Nickel (Ni)	23–28%	Improves corrosion resistance and structural stability
Chromium (Cr)	19–23%	Forms passive film for oxidation resistance
Molybdenum (Mo)	4–5%	Enhances pitting and crevice corrosion resistance
Copper (Cu)	1–2%	Improves resistance to sulfuric acid
Carbon (C)	≤0.02%	Improves weldability and reduces carbide precipitation

2. Key Performance Characteristics of 904L Round Bar

Property	Performance Description
Corrosion resistance	Excellent in strong acids and chloride environments
Pitting resistance	Very high due to high Mo content
Acid resistance	Strong resistance to sulfuric and phosphoric acid
Mechanical strength	Moderate, lower than duplex but stable in harsh conditions
Weldability	Good due to low carbon content
Workability	More difficult than 304 due to high alloy content

3. Performance Breakdown (Why 904L Is Special)

High Nickel System: Stabilizes austenitic structure and improves resistance to stress corrosion cracking
High Molybdenum: Strong protection against pitting and crevice corrosion
Copper Addition: Enhances performance in reducing acids such as sulfuric acid
Ultra-low Carbon: Reduces carbide precipitation during welding

This combination makes 904L one of the most corrosion-resistant austenitic stainless steels available for industrial use.

4. Common Applications of 904L Stainless Steel Round Bar

Industry	Application
Chemical processing	Reactors, heat exchangers, acid storage components
Oil & gas	Corrosive pipelines, offshore equipment parts
Marine engineering	Seawater handling systems, desalination equipment
Pharmaceutical	High-purity processing equipment
Pollution control	Flue gas desulfurization systems

5. 904L vs 316 Stainless Steel (Quick Comparison)

Property	316	904L
Corrosion resistance	Good	Excellent (especially acid environments)
Nickel content	10–14%	23–28%
Molybdenum content	2–3%	4–5%
Cost	Lower	Higher
Application level	General industrial	Severe corrosive environments

6. Teda Ganghua Stainless Steel Supply Capability

As a professional stainless steel supplier, Teda Ganghua provides 904L stainless steel round bars with stable chemical composition, strict dimensional tolerance, and reliable surface finishing options. Our products are widely used in chemical, marine, and high-corrosion industrial systems.

We support cutting, polishing, heat treatment, and customized machining services based on customer requirements.

Explore our stainless steel products here: Stainless Steel Products

Conclusion

904L stainless steel round bar offers outstanding corrosion resistance through its high nickel, molybdenum, and copper alloy system. It is the preferred material for extreme chemical and marine environments where standard stainless steels cannot perform reliably.