ASTM A789/A790 329 Stainless Steel Pipe UNS S32900 Duplex Seamless/Welded Tubes for Corrosion Resistance
Products Specification
| Products Name | Stainless Steel Seamless Pipe |
Grade: | 304 304L 309S 310S 314 316L 316Ti 321 329 347H 410 2205 2507 904L 254SMO and equal grade in GB JIS EN DIN Standard |
| Standards: | ASTM A213M-94b ASTM A249M-94a ASTM A269-94a
ASTM A312M-94b,ect. |
| DIN 17456-85 DIN 17458-85 DIN 17459-92.ect |
| JIS G3446-1994 JIS G3448-1997 JIS G3459-1997 JIS G3463-1994,ect. |
| GB13296-1991 GB14975-2002 GB14976-2002,ect. |
| Size: | ND5 - DN400 |
| Length: | 6m length or cutting any length as request |
| Applications: | fluid and gas transport, structure , boiler, heat exchanger, super heater |
329 stainless steel pipe, also known as ASTM A789/A790 329 SST pipe, is a duplex stainless steel grade renowned for its exceptional corrosion resistance, high strength, and durability. Composed of a balanced ferrite-austenite microstructure, it combines the best properties of ferritic and austenitic stainless steels, making it ideal for harsh environments.
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Chemical Composition:
- Chromium (Cr): 23-28%
- Nickel (Ni): 3-6%
- Molybdenum (Mo): 1-3%
- Carbon (C): ≤0.08%
- Other elements: Manganese, Silicon, Phosphorus, Sulfur.
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Mechanical Properties:
- Tensile strength: ≥795 MPa
- Yield strength: ≥450 MPa
- Elongation: ≥25%
- Excellent resistance to stress corrosion cracking (SCC) and pitting in chloride-rich media.
329 SST pipe is widely used in industries requiring high corrosion resistance and structural integrity:
- Marine Engineering: Offshore platforms, shipbuilding, seawater systems.
- Chemical Processing: Reactors, heat exchangers, pipelines for corrosive fluids.
- Oil and Gas: Subsea equipment, wellheads, and pipelines in sour gas environments.
- Power Generation: Nuclear and thermal power plant components.
- Environmental Engineering: Wastewater treatment facilities, chemical waste systems.
- Duplex Structure: Balanced ferrite-austenite phases enhance strength and resistance to SCC.
- Cost-Effective: Lower nickel content than austenitic grades (e.g., 316L) while maintaining high performance.
- Weldability: Good weldability with proper procedures, suitable for complex fabrications.
- Temperature Resistance: Performs well in both high (-20°C to 300°C) and low-temperature applications.
329 stainless steel pipes are produced via:
- Seamless Pipe: Manufactured from solid billets for high-pressure applications.
- Welded Pipe: Formed from sheets/plates, suitable for lower-pressure systems.
Standards compliance:
- ASTM A789/A790, ASME SA789/SA790, EN 10216-5, JIS G3463.
- 329 stainless steel pipe
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- 329 SST pipe corrosion resistance
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- welded 329 SST pipe supplier
For projects demanding superior resistance to chloride-induced corrosion, high tensile strength, and long-term reliability, 329 stainless steel pipe offers a proven solution. Its duplex microstructure makes it a preferred choice in harsh industrial environments where conventional stainless steels may fail.
Looking for 329 stainless steel pipe suppliers? Contact reputable manufacturers adhering to international standards for quality assurance and custom specifications.
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ASTM A789 / A790 329 Stainless Steel Pipe UNS S32900 Duplex Seamless / Welded Tubes for Corrosion Resistance Images
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