- High strength duplex stainless steel round bar
- Excellent resistance to chloride stress corrosion cracking
- Superior pitting and crevice corrosion resistance
- Good oxidation resistance in mild to moderate environments
329 Round Bar (UNS S32900 Duplex Stainless Steel Bar)
329 Round Bar, also known as UNS S32900 duplex stainless steel bar, is a high-performance duplex stainless steel round bar combining austenitic and ferritic microstructures. It offers an excellent balance of high strength, corrosion resistance, and stress corrosion cracking resistance, making it ideal for demanding industrial and marine environments.
Compared with standard stainless steels such as 304 and 316, 329 stainless steel bar provides significantly higher mechanical strength and improved resistance to chloride-induced corrosion, especially in seawater and chemical environments.
Key Features of 329 Stainless Steel Round Bar
329 duplex stainless steel bar is widely used in corrosion-critical applications:
- High strength duplex stainless steel round bar
- Excellent resistance to chloride stress corrosion cracking
- Superior pitting and crevice corrosion resistance
- Good oxidation resistance in mild to moderate environments
- Higher mechanical strength than 304/316 stainless steel
- Good weldability with proper procedures
- Ideal corrosion resistant stainless steel round bar for marine use
Chemical Composition (UNS S32900 / Duplex Stainless Steel)
- Chromium (Cr): 23.0 – 28.0%
- Nickel (Ni): 3.0 – 6.0%
- Molybdenum (Mo): ≤ 1.0%
- Carbon (C): ≤ 0.08%
- Manganese (Mn): ≤ 2.0%
- Silicon (Si): ≤ 1.0%
- Nitrogen (N): ≤ 0.10%
This composition ensures excellent performance in duplex stainless steel bar corrosion resistant applications.
Mechanical Properties (Typical)
- Tensile Strength: 620 – 880 MPa
- Yield Strength: ≥ 450 MPa
- Hardness: ≤ 290 HB
- High fatigue strength
- Excellent stress corrosion resistance
Product Specifications
We supply premium quality 329 stainless steel round bar stock for industrial applications:
- Diameter: 5mm – 300mm (custom sizes available)
- Length: 1000mm / 3000mm / 6000mm / cut-to-length
- Surface Finish: Black, Peeled, Turned, Polished
- Standards: ASTM A276 / ASTM A479 / UNS S32900
- Condition: Hot rolled / Solution annealed
Applications of 329 Round Bar
329 duplex stainless steel round bar is widely used in industries requiring strength and corrosion resistance:
- Marine engineering and seawater systems
- Offshore oil and gas platforms
- Chemical processing equipment
- Heat exchangers and pressure vessels
- Pump shafts and valve components
- Desalination plants
- Petrochemical and refinery equipment
- Structural components in corrosive environments
It is an excellent choice for marine grade stainless steel bar supplier applications.
Advantages of 329 Stainless Steel Bar
Compared with standard austenitic stainless steels, 329 round bar offers:
- Higher mechanical strength and load capacity
- Excellent resistance to chloride stress corrosion cracking
- Improved performance in seawater environments
- Longer service life in aggressive conditions
- Cost-effective duplex stainless steel solution
It is widely used as a high strength corrosion resistant stainless steel round bar alternative to 316 stainless steel.
FAQ – 329 Round Bar
1. What is 329 stainless steel round bar?
329 round bar (UNS S32900) is a duplex stainless steel combining austenitic and ferritic phases, offering high strength and corrosion resistance.
2. What is 329 stainless steel used for?
It is used in marine environments, chemical plants, offshore platforms, heat exchangers, and high-corrosion industrial applications.
3. Is 329 stainless steel better than 316?
329 stainless steel bar offers higher strength and better resistance to stress corrosion cracking than 316 stainless steel.
4. Is 329 stainless steel suitable for seawater?
Yes, 329 duplex stainless steel round bar performs well in seawater and chloride-rich environments, making it ideal for marine applications.
5. Can 329 round bar be welded?
Yes, it can be welded using proper duplex stainless steel welding procedures to maintain corrosion resistance and strength.
6. What industries use 329 stainless steel bar?
It is widely used in marine engineering, oil & gas, desalination, chemical processing, and power generation industries.
7. What sizes are available?
We supply 329 stainless steel round bar in diameters from 5mm to 300mm, with custom cutting and machining available.
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Email: sales@hengyimetal.com
WhatsApp: +86 19521258704
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