Super Duplex Steel S32750 Sanitary Tubes, Super Duplex 32750 Sanitary Tubes, 32750 Super Duplex Steel Sanitary Tube Manufacturer, Super Duplex 32750 Sanitary Tube Supplier, Super Duplex 32750 Sanitary Tube Exporter, Super Duplex 32750 Precision Tubing, Super Duplex 32750 Small Diameter Tube , Super Duplex 32750 Sanitary Tubes
Super Duplex Steel S32750 sanitary tubes are a high-performance alloy product widely used in industries requiring superior corrosion resistance and high mechanical strength. These tubes are composed of a mixed microstructure of austenite and ferrite, which provides them with a unique combination of properties. S32750, also known as SAF 2507, contains high levels of chromium (around 25%), molybdenum (4%), and nitrogen, enhancing its resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in harsh environments like marine or chemical processing.
One of the main features of S32750 sanitary tubes is their excellent resistance to chloride-induced corrosion, making them ideal for use in industries such as pharmaceuticals, food and beverage processing, and biotechnology, where cleanliness and purity are essential. Sanitary tubes are specifically manufactured with smooth, polished interiors to prevent bacterial growth and contamination, a crucial factor in hygiene-sensitive applications.
The mechanical strength of Super Duplex S32750 is significantly higher than that of standard austenitic stainless steels, allowing for thinner walls and lighter components without compromising performance. This results in cost savings on material and improved efficiency in system design. The alloy’s high yield strength also makes it suitable for high-pressure systems and structural applications.
From a fabrication standpoint, S32750 sanitary tubes offer good weldability and formability, though they require expertise due to the complex nature of duplex microstructures. Proper heat treatment and handling are critical to maintaining their corrosion resistance and mechanical properties. Welding procedures must be carefully controlled to avoid issues like intermetallic phase formation, which can degrade performance.
Specification of Super Duplex Steel S32750 Sanitary Tubes
| Property | Specification / Value |
|---|---|
| Material Grade | Super Duplex Stainless Steel S32750 (UNS S32750, SAF 2507) |
| Standards | ASTM A789 / ASTM A790, ASME SA789 / SA790, EN 10216-5, ISO 1127 |
| Chemical Composition (%): | |
| – Chromium (Cr) | 24.0 – 26.0% |
| – Nickel (Ni) | 6.0 – 8.0% |
| – Molybdenum (Mo) | 3.0 – 5.0% |
| – Nitrogen (N) | 0.24 – 0.32% |
| – Carbon (C) | ≤ 0.030% |
| – Manganese (Mn) | ≤ 1.20% |
| – Phosphorus (P) | ≤ 0.035% |
| – Sulfur (S) | ≤ 0.020% |
| – Silicon (Si) | ≤ 0.80% |
| Mechanical Properties: | |
| – Tensile Strength | ≥ 795 MPa |
| – Yield Strength (0.2% offset) | ≥ 550 MPa |
| – Elongation | ≥ 15% |
| – Hardness | ≤ 32 HRC |
| Density | 7.8 g/cm³ |
| Tube Size Range | ½" to 8" OD (12.7 mm to 219.1 mm) |
| Wall Thickness | 0.5 mm to 6 mm (customizable based on application) |
| Surface Finish | Bright Annealed, Electropolished (Ra ≤ 0.8 µm for sanitary applications) |
| End Type | Plain End, Beveled End, Tri-Clamp, Orbital Weld |
| Applications | Food & Beverage, Pharmaceutical, Biotech, Dairy, Chemical Processing, Marine, Oil & Gas |
In summary, Super Duplex Steel S32750 sanitary tubes are a reliable solution for critical applications demanding hygiene, strength, and corrosion resistance. Their unique blend of mechanical and chemical properties makes them a preferred material in demanding industries such as oil and gas, marine, pharmaceuticals, and food processing. As the demand for high-performance, hygienic piping systems grows, the use of S32750 sanitary tubes continues to expand globally.
Chemical Composition of Super Duplex Steel S32750 Sanitary Tubes
| Element | Minimum (%) | Maximum (%) |
|---|---|---|
| Chromium (Cr) | 24.0 | 26.0 |
| Nickel (Ni) | 6.0 | 8.0 |
| Molybdenum (Mo) | 3.0 | 5.0 |
| Nitrogen (N) | 0.24 | 0.32 |
| Carbon (C) | — | 0.030 |
| Manganese (Mn) | — | 1.20 |
| Phosphorus (P) | — | 0.035 |
| Sulfur (S) | — | 0.020 |
| Silicon (Si) | — | 0.80 |
| Iron (Fe) | Balance | — |
Specification of Super Duplex Steel S32750 Sanitary Tubes
| Property | Specification / Value |
|---|---|
| Material Grade | Super Duplex Stainless Steel S32750 (UNS S32750, SAF 2507) |
| Standards | ASTM A789 / ASTM A790, ASME SA789 / SA790, EN 10216-5, ISO 1127 |
| Chemical Composition (%): | |
| – Chromium (Cr) | 24.0 – 26.0% |
| – Nickel (Ni) | 6.0 – 8.0% |
| – Molybdenum (Mo) | 3.0 – 5.0% |
| – Nitrogen (N) | 0.24 – 0.32% |
| – Carbon (C) | ≤ 0.030% |
| – Manganese (Mn) | ≤ 1.20% |
| – Phosphorus (P) | ≤ 0.035% |
| – Sulfur (S) | ≤ 0.020% |
| – Silicon (Si) | ≤ 0.80% |
| Mechanical Properties: | |
| – Tensile Strength | ≥ 795 MPa |
| – Yield Strength (0.2% offset) | ≥ 550 MPa |
| – Elongation | ≥ 15% |
| – Hardness | ≤ 32 HRC |
| Density | 7.8 g/cm³ |
| Tube Size Range | ½" to 8" OD (12.7 mm to 219.1 mm) |
| Wall Thickness | 0.5 mm to 6 mm (customizable based on application) |
| Surface Finish | Bright Annealed, Electropolished (Ra ≤ 0.8 µm for sanitary applications) |
| End Type | Plain End, Beveled End, Tri-Clamp, Orbital Weld |
| Applications | Food & Beverage, Pharmaceutical, Biotech, Dairy, Chemical Processing, Marine, Oil & Gas |
🏭 Industry & Application
- ✅ Super Duplex 32750 Sanitary Tubes for Medical Industry
- ✅ Super Duplex 32750 Sanitary Tubes for Chemical Processing
- ✅ Super Duplex 32750 Tubes for Sanitary Lines
- ✅ Super Duplex Steel S32750 Sanitary Tubes for Gas & Liquid Flow
- ✅ Super Duplex 32750 Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1:What is Super Duplex Steel S32750?
Super Duplex Steel S32750 (also known as SAF 2507) is a high-alloy duplex stainless steel with a balanced microstructure of austenite and ferrite. It offers excellent strength, corrosion resistance (especially against chlorides), and is used in demanding environments such as marine, chemical, and sanitary systems.
Q2:Why is S32750 used for sanitary applications?
S32750 is used for sanitary tubes because it combines high corrosion resistance with mechanical strength, and its smooth, polished internal surfaces (typically Ra ≤ 0.8 µm) prevent contamination and bacterial growth—critical in food, beverage, pharmaceutical, and biotech industries.
Q3:How does S32750 differ from regular stainless steel like 316L?
Compared to 316L, S32750 has: Higher strength (about twice the yield strength) Much better resistance to pitting, crevice, and stress corrosion (especially in chloride-rich environments) A longer service life in aggressive conditions However, it is more expensive and requires skilled fabrication.
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