- Excellent resistance to strong acids (sulfuric, phosphoric, acetic acid)
- Superior chloride corrosion and pitting resistance
- High nickel and molybdenum content for enhanced performance
- Good weldability and machinability
- Excellent durability in harsh chemical environments
- Long service life in extreme conditions
904L Stainless Steel Round Bar
904L stainless steel round bar is a super austenitic stainless steel designed for extreme corrosion resistance in highly aggressive environments. With high levels of nickel, chromium, and molybdenum, it offers outstanding resistance to strong acids, chloride corrosion, and pitting, making it ideal for chemical, marine, and industrial applications.
Compared with standard stainless steels like 304 and 316, 904L provides significantly superior corrosion resistance and durability in harsh conditions.
Key Features
- Excellent resistance to strong acids (sulfuric, phosphoric, acetic acid)
- Superior chloride corrosion and pitting resistance
- High nickel and molybdenum content for enhanced performance
- Good weldability and machinability
- Excellent durability in harsh chemical environments
- Long service life in extreme conditions
Chemical Composition (Typical)
- Nickel (Ni): 23.0 – 28.0%
- Chromium (Cr): 19.0 – 23.0%
- Molybdenum (Mo): 4.0 – 5.0%
- Copper (Cu): 1.0 – 2.0%
- Carbon (C): ≤ 0.02%
- Manganese (Mn): ≤ 2.0%
- Iron (Fe): Balance
Mechanical Properties
- Tensile Strength: ≥ 490 MPa
- Yield Strength: ≥ 220 MPa
- Elongation: ≥ 35%
- Hardness: ≤ 90 HRB
Available Specifications
- Diameter: 6 mm – 600 mm (customizable)
- Length: 1000 mm – 6000 mm or custom cut length
- Form: Hot rolled / Cold drawn / Forged round bar
- Surface Finish: Black, Bright polished, Peeled, Ground
- Standard: ASTM B649 / EN 1.4539 / UNS N08904
Applications
- Chemical processing equipment
- Sulfuric acid and phosphoric acid systems
- Marine and offshore engineering
- Heat exchangers and condensers
- Pharmaceutical and food processing equipment
- Pulp and paper industry
- Desalination plants
- High-corrosion industrial environments
Surface Finishes
- Hot rolled black bar – for industrial use
- Cold drawn bright bar – smooth and precise surface
- Peeled round bar – improved dimensional accuracy
- Ground polished bar – high precision engineering use
Processing Services
- Cutting to length
- Heat treatment (solution annealing)
- CNC machining
- Centerless grinding
- Custom diameter processing
Why Choose Our 904L Round Bar?
- High-purity raw materials with strict quality control
- Stable corrosion resistance performance
- Precise diameter tolerance and straightness
- OEM and custom machining available
- Reliable supply for chemical and marine industries
- Factory direct pricing with fast delivery
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904L Stainless Steel Properties
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