Super Duplex Steel S32750 Fin Tubes, Super Duplex 32750 Fin Tubes, 32750 Super Duplex Steel Fin Tube Manufacturer, Super Duplex 32750 Fin Tube Supplier, Super Duplex 32750 Fin Tube Exporter,Super Duplex 32750 Precision Tubing,Super Duplex 32750 Small Diameter Tube ,Super Duplex 32750 Fin Tubes
Super Duplex Steel S32750 fin tubes are high-performance heat exchanger components made from a super duplex stainless steel alloy that offers superior mechanical strength and corrosion resistance. These tubes are widely used in industries such as petrochemical, oil and gas, marine, and power generation, where equipment is exposed to harsh and corrosive environments. The finned design increases the surface area of the tube, enhancing its heat transfer efficiency, which is critical in systems where energy conservation and performance are priorities.
The S32750 grade is a super duplex stainless steel known for its balanced composition of chromium, molybdenum, and nitrogen. This unique chemistry provides exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-containing environments. These properties make S32750 fin tubes ideal for seawater applications and other aggressive service conditions. The high yield strength of the material also contributes to long-term durability under high-pressure operations.
Fin tubes made from S32750 are produced by attaching fins (typically made of the same or a compatible metal) to the outer surface of the tube through mechanical or extrusion processes. The fins improve the tube’s thermal efficiency by increasing the exterior surface area, allowing for more efficient heat transfer between the fluid inside the tube and the surrounding environment. These tubes are often used in air coolers, condensers, and heat recovery systems.
From a fabrication and welding standpoint, S32750 requires expertise due to its high strength and work-hardening characteristics. However, when properly handled, it can be formed and welded with satisfactory results. Post-weld heat treatment may be necessary depending on the application to restore corrosion resistance. Additionally, these tubes are available in various sizes and fin configurations, customized to suit specific thermal and mechanical requirements.
Specification of Super Duplex Steel S32750 Fin Tubes
| Property / Specification | Details |
|---|---|
| Material Grade | Super Duplex Stainless Steel S32750 (UNS S32750 / 1.4410) |
| Standards | ASTM A789 / A790, ASME SA789 / SA790, ASTM B111, ASME B111 |
| Chemical Composition (%) | Cr: 24–26, Ni: 6–8, Mo: 3–5, N: 0.24–0.32, Mn: ≤1.2, Si: ≤0.8, C: ≤0.03 |
| Tensile Strength | ≥ 795 MPa (115 ksi) |
| Yield Strength (0.2% Offset) | ≥ 550 MPa (80 ksi) |
| Elongation | ≥ 15% |
| Hardness | ≤ 32 HRC |
| Density | 7.8 g/cm³ |
| Melting Point | 1350–1400°C |
| Fin Type | Integral (extruded), welded, or embedded fins |
| Tube Outer Diameter (OD) | 12 mm to 50.8 mm (customizable) |
| Wall Thickness | 0.5 mm to 3.0 mm (depending on OD and application) |
| Fin Height | Typically 6 mm to 15 mm |
| Fin Thickness | 0.3 mm to 1.2 mm |
| Fin Density | 5 to 26 fins per inch (FPI) |
| Maximum Operating Temperature | Up to 315°C (in chloride environments) |
| Corrosion Resistance | Excellent resistance to pitting, crevice corrosion, and SCC in chlorides |
| Applications | Heat exchangers, air coolers, offshore platforms, condensers, desalination |
Overall, Super Duplex Steel S32750 fin tubes represent an excellent choice for high-demand heat exchanger applications. Their combination of high corrosion resistance, mechanical strength, and enhanced thermal performance ensures reliability and longevity in the most demanding industrial settings. This makes them a cost-effective solution over the long term, reducing maintenance needs and improving operational efficiency.
Chemical Composition of Super Duplex Steel S32750 Fin 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 |
| Manganese (Mn) | — | 1.20 |
| Silicon (Si) | — | 0.80 |
| Carbon (C) | — | 0.030 |
| Phosphorus (P) | — | 0.035 |
| Sulfur (S) | — | 0.020 |
| Iron (Fe) | Balance | Balance |
Specification of Super Duplex Steel S32750 Fin Tubes
| Property / Specification | Details |
|---|---|
| Material Grade | Super Duplex Stainless Steel S32750 (UNS S32750 / 1.4410) |
| Standards | ASTM A789 / A790, ASME SA789 / SA790, ASTM B111, ASME B111 |
| Chemical Composition (%) | Cr: 24–26, Ni: 6–8, Mo: 3–5, N: 0.24–0.32, Mn: ≤1.2, Si: ≤0.8, C: ≤0.03 |
| Tensile Strength | ≥ 795 MPa (115 ksi) |
| Yield Strength (0.2% Offset) | ≥ 550 MPa (80 ksi) |
| Elongation | ≥ 15% |
| Hardness | ≤ 32 HRC |
| Density | 7.8 g/cm³ |
| Melting Point | 1350–1400°C |
| Fin Type | Integral (extruded), welded, or embedded fins |
| Tube Outer Diameter (OD) | 12 mm to 50.8 mm (customizable) |
| Wall Thickness | 0.5 mm to 3.0 mm (depending on OD and application) |
| Fin Height | Typically 6 mm to 15 mm |
| Fin Thickness | 0.3 mm to 1.2 mm |
| Fin Density | 5 to 26 fins per inch (FPI) |
| Maximum Operating Temperature | Up to 315°C (in chloride environments) |
| Corrosion Resistance | Excellent resistance to pitting, crevice corrosion, and SCC in chlorides |
| Applications | Heat exchangers, air coolers, offshore platforms, condensers, desalination |
🏭 Industry & Application
- ✅ Super Duplex 32750 Fin Tubes for Medical Industry
- ✅ Super Duplex 32750 Fin Tubes for Chemical Processing
- ✅ Super Duplex 32750 Tubes for Fin Lines
- ✅ Super Duplex Steel S32750 Fin Tubes for Gas & Liquid Flow
- ✅ Super Duplex 32750 Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1:What are Super Duplex Steel S32750 Fin Tubes?
Super Duplex Steel S32750 fin tubes are heat exchanger tubes made from a super duplex stainless steel alloy. They have fins attached to their external surface to enhance heat transfer efficiency. S32750 offers excellent corrosion resistance and mechanical strength, making it suitable for harsh environments.
Q2:Where are these fin tubes typically used?
These tubes are commonly used in: Heat exchangers Air-cooled condensers Desalination plants Offshore oil and gas platforms Petrochemical processing Power generation plants
Q3:What makes S32750 suitable for aggressive environments?
S32750 contains high levels of chromium, molybdenum, and nitrogen, which give it superior resistance to: Pitting and crevice corrosion Stress corrosion cracking (especially in chloride environments) General corrosion and erosion
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