UNS S32760 tube is a super duplex stainless steel tube with high chromium, molybdenum, tungsten and copper content. It provides superior strength and corrosion resistance for harsh environments.
ASTM A789 Super Duplex S32760 Seamless Tubes Manufacturer in China
We, Zhejiang Xintongda Special Steel (XTD), are a trusted manufacturer in China and a global supplier of high-performance Super duplex S32760 seamless tube. This tube, also known as Zeron 100, features an approximately 50% austenite and 50% ferrite microstructure It consists of 24.0-26.0% chromium, 6.0-8.0% nickel, 3.0-4.0% molybdenum, and the same amounts of tungsten and copper (0.50-1.00%). We produce this tube in compliance with the ASTM A789 standard. The ferritic phase provides high strength while the austenitic phase provides superior resistance to chloride stress corrosion cracking. This makes it a preferred choice for heavy industrial environments. We offer this tube with high impact strength and no ductile–brittle transition. This 1.4501 seamless tube endures chloride pitting and crevice corrosion in maximum continuous service temperature up to 572°F (300°C). We have an annual supply capacity of 25000 tons and deliver UNS S32760 tube within a week for stock orders.
Being a reliable Super Duplex Stainless Steel Tube supplier, we ensure our tubes meet these specifications:
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Standard
ASTM A789
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OD Range
6-720 mm
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Thickness
1-65 mm
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Length
≤ 22 m
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Technical Data
Technical Data
Key steps in manufacturing Super Duplex Steel S32760 Seamless Tubes
We start the production of 32760 tube by heating a high-quality steel billet and piercing it to create a hollow shell. Then we use cold rolling or drawing to achieve the precise dimensions and smooth finish required. Finally, it is solution annealed in a controlled atmosphere, followed by water quenching to ensure the best corrosion resistance. Visit this page to learn about our detailed manufacturing process.
What are the Features of Super Duplex S32760 Seamless Tube?
Super duplex S32760 tube has 5 important features:
- Exceptional Corrosion Resistance: Our super duplex stainless steel UNS S32760 tube contains high levels of chromium, molybdenum, tungsten, copper, and nitrogen to resist acid corrosion. This chemical balance allows it to survive in highly aggressive and sour chemical environments.
- Pitting and Crevice Resistance: Our tube delivers a high Pitting Resistance Equivalent Number (PREN- typically above 40). It prevents pitting in stagnant or low-velocity seawater conditions. The addition of tungsten (0.50-1.00%) and nitrogen specifically strengthens the protective surface layer against chloride attacks.
- Superior Mechanical Properties: The dual-phase structure provides much higher yield strength than standard austenitic stainless steels. This allows the use of thinner walls in the tube. This reduces its overall weight and cost.
- Stress Corrosion and Fatigue Resistance: The ferritic grain structure helps the tube resist cracking under combined tensile stress and corrosive heat. It is an ideal choice for equipment that undergoes constant pressure cycles in salty conditions.
- Good Impact Toughness: This tube maintains excellent energy absorption and does not become brittle at sub-zero temperatures. It ensures the tube remains durable and safe during transport or operation in cold climates.
ASTM A789 S32760 Tube Equivalent Grade
32760 seamless tube is made from the UNS S32760 material. This is also its standard equivalent designation. Its other global equivalents include EN 1.4501 and Zeron 100.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| 2760 | S32760 | S27603 | 022Cr25Ni7Mo4N | SUS329J4L | X2CrNiMoN25-7-4 | 1.4501 | - |
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
What industries commonly use Super Duplex 32760 Seamless Tube?
Super duplex 32760 seamless tube is used in 6 major industries:
Marine Engineering
This tube is used for propeller shafts and rudder parts that stay submerged in salt water. The material prevents metal loss and structural failure in deep-sea environments.
Pulp & Paper
The 32760 seamless tube carries bleaching chemicals and corrosive liquors through the digestion and recycling stages. It withstands the acidic cleaners used to process wood fibres into paper products.
Oil & Gas Industry
Subsea pipelines and flowlines use the tube to transport sour crude oil and natural gas. It resists hydrogen sulfide and prevents leaks in high-pressure underwater wells.
Power Generation
Flue gas desulfurization systems use Super duplex 32760 tube to handle the hot, corrosive gases produced by burning coal. It helps clean emissions while resisting the sulfuric acid created during the process.
Seawater Desalination Plants
This tube is used in high-pressure piping systems to move salt water through reverse osmosis membranes. It resists the high salt concentrations that would destroy lower grades of metal.
Chemical Processing Equipment
Distillation columns and heat exchangers use this Super duplex tubing to process organic acids and chloride-based chemicals. It provides a long service life in plants that produce plastics and fertilisers.
Frequently Asked Questions
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What is the UNS S32760 Tube?
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What is the difference between Super Duplex UNS S32760 and S32750 tubes?The difference between Super duplex UNS S32760 and S32750 tubes is that S32760 has added tungsten and copper for better pitting and crevice corrosion resistance. S32750 does not include tungsten or copper, relying on molybdenum and nitrogen alone for corrosion resistance. Both have similar strength but S32760 is suitable for more aggressive conditions.
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Why is Super Duplex S32760 preferred in marine environments?Super Duplex S32760 is preferred in marine environments because of its high resistance to seawater corrosion, pitting and stress cracking from chlorides. It performs better than standard duplex grades in desalination, offshore and seawater systems.