Super Duplex Steel Tubes Manufacturer and Supplier Thailand
Super duplex steel tube is a specialized tube made from a super duplex alloy, which combines austenitic and ferritic structures to offer outstanding mechanical strength and excellent corrosion resistance, especially in harsh environments like seawater and aggressive chemical processing. Thaida, a trusted manufacturer and supplier based in Thailand, we provide high-quality Super Duplex Steel Tubes that are tailored to meet the toughest industry demands. Backed by years of experience and technical expertise, we maintain stringent quality standards and advanced manufacturing processes. These tubes are engineered with a higher content of chromium, molybdenum, and nitrogen, giving them superior durability compared to standard duplex steel. With advanced production facilities and strict quality control, we deliver seamless tubes, U-tubes, boiler tubes, and instrumentation tubing that perform reliably in oil & gas, marine, desalination, and chemical industries.
About Super Duplex steel Tubes
Super Duplex Tubing is a high-performance stainless steel product characterized by a two-phase ferritic and austenitic microstructure. These super duplex tubes are alloyed with chromium, molybdenum, nickel, and nitrogen, offering a superior balance of high strength, toughness, and excellent corrosion resistance. Commonly available grades include UNS S32750, UNS S32760, SAF 2507, and WNR 1.4410, each offering specific performance benefits for various industrial needs. Known for their high hardness and wear resistance properties, SDSS tubes perform exceptionally well in demanding environments like offshore, chemical processing, and marine applications. Super duplex stainless steel tubes also exhibit good resistance to stress corrosion cracking and maintain good toughness even in low temperatures, making them ideal for critical structural and flow-related applications.
Advantages of ASTM A789 Super Duplex Tubes
The key advantages of ASTM A789 Super Duplex Tubes include corrosion resistance, strength, and performance in harsh environments.
Exceptional Corrosion Resistance
These tubes offer excellent resistance to a wide range of corrosive environments, including chloride-rich and marine settings, due to their high chromium and molybdenum content.
Wear and Hardness Properties
These tubes have high hardness and wear resistance properties, offering a longer service life even under abrasive and erosive operating conditions.
High Strength and Toughnes
ASTM A789 super duplex tubes provide superior mechanical strength and good toughness, making them suitable for high-pressure and load-bearing applications.
Resistance to Stress Corrosion Cracking
Their dual-phase ferritic and austenitic structure gives them good resistance to stress corrosion cracking, especially in aggressive and fluctuating environments.
Cost-Effective Performance
Due to their long-term durability, reduced maintenance, and extended lifecycle, these tubes present a cost-efficient solution for demanding industrial uses.
Why Choose Thaida for Your Super Duplex Tubing Needs?
Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd. specializes in delivering high-quality tubing solutions, backed by years of expertise in duplex steel tube manufacturing. As trusted super duplex stainless steel tube suppliers, we are committed to providing products that offer exceptional strength, corrosion resistance, and long-term reliability. With a strong focus on quality, precision, and customer satisfaction, we stand out as the preferred choice for industries looking for reliable and high-performance solutions.
Competitive Pricing
Global Exports Expertise
Large Inventory & Fast Dispatch
Custom Sizes & Finishes
Industry Certifications & Compliance
Advanced Production Technology
After-Sales Support, Service- Technical Support
In-House Testing & Full Traceability
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Specifications of Super Duplex Stainless Steel Tubes
This Super duplex stainless steel tube specifications section includes dimensional specifications, pipe size, wall thickness, outside diameter, and surface finish details.
| Tubes Specifications | ASTM A789 / ASME SA789 |
|---|---|
| Dimensional specification | ANSI/ASME B36.19M, ANSI/ASME B36.10M |
| ASTM A789 Seamless Tubes Size | 1 / 2" NB - 16" NB |
| Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
| Super Duplex Tubes Manufacturing Techniques | Seamless |
| Super Duplex Tubes Schedule Thickness Range | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Ferritic / Austenitic Tubes End Types | Plain End, Beveled End, Treaded One End, TBE (Treaded Both Ends) |
| Delivery Condition of Super Duplex steel Tubes | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Surface Finish | No.1, No.4, No.8 Mirror Finish, 2B |
| Value Added Services | Cutting, Beveling, Polishing, Threading, Destructive, Non-Destructive, Ultrasonic Testing |
| Inspection and Test Reports | EN 10204 3.1, Mill Test Certificates, Chemical Reports, PMI Test Reports, Mechanical Reports, Third Party Inspection, NABL Approved Lab, Visual Inspection, Destructive Test and Non-Destructive Test Reports |
| Marking | Specification Grade Nominal Tubes Sizes Tubes Schedule or Wall Thickness Manufacturing Method (Seamless) Heat Number Manufacturer’s Name or Custom Logo - on request |
| Outside Finish | 2B, No.4, No.1, No.8 Mirror Finish for Super Duplex Tubes, Finish as per customer Requirements |
| Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Packing of Super Duplex Tubes | Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests |
| Specials | Sizes and Specifications other than above can be on request |
Various Types of Super Duplex Stainless Steel Tubes
Here are the 12 different types of Super Duplex Stainless Steel Tubes used across various industries for their superior strength and resistance:
At Thaida, we only provide high-quality super duplex stainless steel seamless tubes.
These tubes are made without any welding seams, offering uniform strength and corrosion resistance. Ideal for high-pressure and high-temperature environments.
Super Duplex 2507 Welded Tubes
Though not offered by Thaida, welded tubes are typically used in low-pressure applications and made by welding super duplex steel plates. They are less preferred for critical environments due to lower strength at the weld joints.
1.4410 Mechanical Tubing
Also known as UNS S32750, this type is engineered for structural and mechanical applications requiring high strength, hardness, and dimensional accuracy.
Alloy 2507 Square Tubes
These tubes are used in structural applications and offer superior strength with a uniform square profile. Ideal for load-bearing constructions in corrosive environments.
Super Duplex Boiler Tubes
Designed to perform under high pressure and temperature, these tubes are used in boiler systems due to their exceptional thermal conductivity and corrosion resistance.
WNR 1.4410 Coil Tubes
Manufactured in long continuous lengths, these coil tubes are suitable for instrumentation and hydraulic applications requiring high precision and flexibility.
Super Duplex Heat Exchanger Tubes
Used extensively in chemical processing and oil & gas industries, these tubes offer excellent heat transfer and stress corrosion cracking resistance in aggressive environments.
SAF 2507 Capillary Tubes
These ultra-fine tubes are used in instrumentation and medical industries where small internal diameters and corrosion resistance are essential.
Super Duplex 2507 Annealed Tubes
These tubes undergo an annealing process for enhanced ductility and improved mechanical properties, making them suitable for forming and shaping.
UNS S32750 Rectangular Tubes
Rectangular tubes provide a strong flat profile for structural applications and architectural designs needing both aesthetics and durability.
UNS S32760 Gas Tubes
These tubes are tailored for gas transmission and processing systems, offering good toughness and reliability under variable pressure conditions.
Duplex 2507 U Shaped Tubing
Commonly used in heat exchangers, these U-bent tubes ensure efficient fluid flow and heat transfer while withstanding high pressure and temperature fluctuations.
Super Duplex Tubing Chemical Composition
The Super duplex steel tubing chemical composition table highlights essential elements such as chromium, nickel, carbon, and manganese levels.
| Element | Content (%) |
|---|---|
| Chromium, Cr | 24 – 26 |
| Nickel, Ni | 6 – 8 |
| Molybdenum, Mo | 3 – 5 |
| Manganese, Mn | 1.20 max |
| Silicon, Si | 0.80 max |
| Copper, Cu | 0.50 max |
| Nitrogen, N | 0.24 – 0.32 |
| Phosphorous, P | 0.035 max |
| Carbon, C | 0.030 max |
| Sulfur, S | 0.020 max |
| Iron, Fe | Balance |
Super Duplex Tubing Mechanical Composition
Mechanical Properties of Super duplex steel tube, such as tensile strength, yield strength, elongation, and hardness, are provided below.
| Yield Strength | Tensile Strength | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | UNS Designation | ksi | psi | MPa | Spec. | psi | MPa | ksi | Elongation in 2 in. (min.) % | Modulus of Elasticity (x106psi) | Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) | Grain Size Req. | Max. Hardness | Thermal Conductivity (BTU-in/ ft2-h-°F) |
| 2507 | S32750 | 116 | 80,000 | 550 | A789, A790 | 116,000 | 800 | 80 | 15 | 27.5 | 7.2 | - | 32 Rc | |
| 2507 | S32950 | 100 | 70,000 | 485 | A789, A790 | 100,000 | 690 | 70 | 20 | - | - | - | 30.5 Rc | - |
Super Duplex Tubing Sizes Chart
| OD mm | WT mm | Schedule | Kg/m | inch |
|---|---|---|---|---|
| 33.040 | 6.0352) | 160 | 4.030 | 1 |
| 42.016 | 2.077 | 10S | 2.073 | 1¼ |
| 42.016 | 3.056 | 40S | 3.044 | 1¼ |
| 42.016 | 4.085 | 80S | 4.053 | 1¼ |
| 42.016 | 6.0352 | 160 | 5.069 | 1¼ |
| 48.026 | 2.077 | 10S | 3.016 | 1½ |
| 48.026 | 3.068 | 40S | 4.011 | 1½ |
| 48.026 | 5.008 | 80S | 5.049 | 1½ |
| 60.033 | 2.077 | 10S | 3.099 | 2 |
| 60.033 | 3.091 | 40S | 5.052 | 2 |
| 60.033 | 5.054 | 80S | 7.060 | 2 |
| 60.033 | 8.0742 | 160 | 11.029 | 2 |
| 73.003 | 3.005 | 10S | 5.035 | 2½ |
| 73.003 | 5.016 | 40S | 8.077 | 2½ |
| 73.003 | 7.001 | 80S | 11.059 | 2½ |
| 88.090 | 3.005 | 10S | 6.056 | 3 |
| 88.090 | 5.049 | 40S | 11.047 | 3 |
| 88.090 | 7.062 | 80S | 15.051 | 3 |
| 88.090 | 11.0132 | 160 | 21.067 | 3 |
| 101.060 | 3.005 | 10S | 7.053 | 3½ |
| 13.072 | 1.065 | 10S | 0.050 | 1/4 |
| 13.072 | 2.024 | 40S | 0.064 | 1/4 |
| 13.072 | 3.002 | 80S | 0.081 | 1/4 |
| 17.015 | 1.065 | 10S | 0.064 | 3/8 |
| 17.015 | 2.031 | 40S | 0.086 | 3/8 |
| 17.015 | 3.020 | 80S | 1.012 | 3/8 |
| 21.034 | 2.011 | 10S | 1.002 | 1/2 |
| 21.034 | 2.077 | 40S | 1.029 | 1/2 |
| 21.034 | 3.073 | 80S | 1.065 | 1/2 |
| 26.067 | 2.011 | 10S | 1.030 | 3/4 |
| 26.067 | 2.087 | 40S | 1.071 | 3/4 |
| 26.067 | 3.091 | 80S | 2.023 | 3/4 |
| 33.040 | 2.077 | 10S | 2.013 | 1 |
| 33.040 | 3.038 | 40S | 2.054 | 1 |
| 33.040 | 4.055 | 80S | 3.029 | 1 |
| 101.060 | 5.074 | 40S | 13.078 | 3½ |
| 101.060 | 8.008 | 80S | 18.092 | 3½ |
| 114.030 | 3.005 | 10S | 8.050 | 4 |
| 114.030 | 6.002 | 40S | 16.032 | 4 |
| 114.030 | 8.056 | 80S | 22.067 | 4 |
| 114.030 | 13.0492 | 160 | 34.005 | 4 |
| 141.030 | 6.055 | 40S | 22.010 | 5 |
| 141.030 | 9.053 | 80S | 31.044 | 5 |
| 141.030 | 15.0882 | 160 | 49.087 | 5 |
| 168.028 | 3.04 | 10S | 14.004 | 6 |
| 168.028 | 7.011 | 40S | 28.069 | 6 |
| 168.028 | 10.097 | 80S | 43.021 | 6 |
| 168.028 | 14.027 | 120 | 54.075 | 6 |
| 168.028 | 18.0262 | 160 | 68.059 | 6 |
| 219.008 | 8.018 | 40S | 43.020 | 8 |
| 219.008 | 12.07 | 80S | 65.063 | 8 |
| 219.008 | 18.023 | 120 | 91.030 | 8 |
| 219.008 | 23.0012 | 160 | 112.097 | 8 |
Weight Chart of Super Duplex Boiler Tubes
| OUTER DIA MM | NOMINAL SIZES | WALL THK MM | WEIGHT, KILOGRAM/M |
|---|---|---|---|
| 48.26 | 1 1/2" 40S | 3.68 | 5.49 |
| 60.33 | 2" 5S | 1.65 | 2.42 |
| 60.33 | 2" 10S | 2.77 | 3.99 |
| 60.33 | 2" 40S | 3.91 | 5.52 |
| 73 | 2 1/2" 10s | 3.05 | 5.35 |
| 73 | 2 1/2" 40S | 5.16 | 8.77 |
| 88.90 | 3" 5S | 2.11 | 4.58 |
| 88.90 | 3" 10S | 3.05 | 6.56 |
| 88.90 | 3" 40S | 5.49 | 11.47 |
| 101.60 | 3 1/2" 10s | 3.05 | 7.53 |
| 114.30 | 4" 5S | 2.11 | 5.93 |
| 114.30 | 4" 10S | 3.05 | 8.50 |
| 114.30 | 4" 40S | 6.02 | 16.32 |
| 141.3 | 5" 10S | 3.4 | 11.74 |
| 141.3 | 5" 40S | 6.55 | 22.1 |
| 168.3 | 6" 5S | 2.77 | 11.48 |
| 168.3 | 6" 10S | 3.4 | 14.04 |
| 168.3 | 6" 40S | 7.11 | 28.69 |
| 219.1 | 8" 5S | 2.77 | 15.0 |
| 219.1 | 8" 10S | 3.76 | 20.27 |
| 219.1 | 8" 40S | 8.18 | 43.2 |
| 273 | 10" 5S | 3.40 | 22.95 |
| 273 | 10" 10S | 4.19 | 28.2 |
| 21.34 | 1/2" 10S | 2.11 | 1.02 |
| 21.34 | 1/2" 40S | 2.77 | 1.29 |
| 26.67 | 3/4" 10S | 2.11 | 1.30 |
| 26.67 | 3/4" 40S | 2.87 | 1.71 |
| 33.40 | 1" 5S | 1.65 | 1.31 |
| 33.40 | 1" 10S | 2.77 | 2.13 |
| 33.40 | 1" 40S | 3.38 | 2.54 |
| 42.16 | 1 1/4" 5S | 1.65 | 1.67 |
| 42.16 | 1 1/4" 10S | 2.77 | 2.73 |
| 42.16 | 1 1/4" 40s | 3.56 | 3.44 |
| 48.26 | 1 1/2" 5S | 1.65 | 1.92 |
| 48.26 | 1 1/2" 10S | 2.77 | 3.16 |
| 273 | 10" 40S | 9.27 | 61.22 |
| 323.9 | 12" 5S | 3.96 | 31.72 |
| 323.9 | 12" 10S | 4.57 | 36.54 |
| 323.9 | 12" 40S | 9.53 | 75.02 |
| 355.6 | 14" 10S | 4.78 | 41.99 |
| 355.6 | 14" STD | 9.53 | 82.583 |
| 406.4 | 16" STD | 9.53 | 94.706 |
| 406.4 | 16" 10S | 4.78 | 48.07 |
| 457.2 | 18" 10S | 4.78 | 54.151 |
| 508.0 | 20" 10S | 5.54 | 69.702 |
| 610.0 | *24" 10S | 6.35 | 95.919 |
Pressure Rating of Super Duplex Stainless Steel Tubes
| Tube Schedule | Tube Size | 200° | 100°F | 300° | 500° | 400° | 650° | 750° | 600° | 700° |
|---|---|---|---|---|---|---|---|---|---|---|
| 80 | 1″ | 3634 | 4213 | 3265 | 2791 | 3002 | 2580 | 2501 | 2659 | 2528 |
| 40 | 1″ | 2629 | 3048 | 2362 | 2019 | 2171 | 1867 | 1810 | 1924 | 1824 |
| 160 | 1″ | 5296 | 6140 | 4759 | 4068 | 4375 | 3761 | 3646 | 3876 | 3684 |
| 80 | 1.5″ | 2744 | 3182 | 2466 | 2108 | 2267 | 1949 | 1889 | 2009 | 1909 |
| 40 | 1.5″ | 1947 | 2257 | 1750 | 1496 | 1608 | 1383 | 1340 | 1425 | 1354 |
| 160 | 1.5″ | 3984 | 4619 | 3580 | 3060 | 3291 | 2829 | 2743 | 2916 | 2772 |
| 80 | 2″ | 2369 | 2747 | 2129 | 1820 | 1957 | 1682 | 1631 | 1734 | 1648 |
| 40 | 2″ | 1640 | 1902 | 1474 | 1260 | 1355 | 1165 | 1129 | 1201 | 1141 |
| 160 | 2″ | 3880 | 4499 | 3486 | 2980 | 3205 | 2755 | 2671 | 2840 | 2699 |
| 80 | 3″ | 2202 | 2553 | 1979 | 1691 | 1819 | 1564 | 1516 | 1612 | 1532 |
| 40 | 3″ | 1558 | 1806 | 1400 | 1196 | 1287 | 1106 | 1072 | 1140 | 1084 |
| 160 | 3″ | 3312 | 3840 | 2976 | 2544 | 2736 | 2352 | 2280 | 2424 | 2304 |
| 80 | 4″ | 1909 | 2213 | 1715 | 1466 | 1577 | 1355 | 1314 | 1397 | 1328 |
| 40 | 4″ | 1321 | 1531 | 1187 | 1014 | 1091 | 938 | 909 | 967 | 919 |
| 160 | 4″ | 3106 | 3601 | 2791 | 2386 | 2566 | 2206 | 2138 | 2273 | 2161 |
| 80 | 5″ | 1709 | 1981 | 1535 | 1312 | 1411 | 1213 | 1176 | 1250 | 1189 |
| 40 | 5″ | 1158 | 1342 | 1040 | 889 | 956 | 822 | 797 | 847 | 805 |
| 160 | 5″ | 2945 | 3414 | 2646 | 2262 | 2433 | 2091 | 2027 | 2155 | 2049 |
| 80 | 6″ | 1650 | 1913 | 1483 | 1267 | 1363 | 1172 | 1136 | 1208 | 1148 |
| 40 | 6″ | 1052 | 1219 | 945 | 808 | 869 | 747 | 724 | 770 | 732 |
| 160 | 6″ | 2836 | 3289 | 2549 | 2179 | 2343 | 2014 | 1953 | 2076 | 1973 |
| 80 | 8″ | 1459 | 1692 | 1311 | 1121 | 1205 | 1036 | 1005 | 1068 | 1015 |
| 40 | 8″ | 926 | 1073 | 832 | 711 | 765 | 657 | 637 | 678 | 644 |
| 160 | 8″ | 2738 | 3175 | 2460 | 2103 | 2262 | 1944 | 1885 | 2004 | 1905 |
| 80 | 10″ | 1388 | 1609 | 1247 | 1066 | 1147 | 986 | 956 | 1016 | 966 |
| 40 | 10″ | 840 | 974 | 755 | 945 | 694 | 596 | 578 | 615 | 584 |
| 160 | 10″ | 2714 | 3147 | 2439 | 2085 | 2242 | 1927 | 1868 | 1986 | 1880 |
Super Duplex Tubes Dimensions
| Outer Diameter (OD) | Range of Wall Thicknesses | Wall Thickness (WT) |
|---|---|---|
| 152.4 mm | 8.0 mm | 7 mm |
| 19 mm | 1.0 mm | 0.5 mm |
| 6.35 mm | 0.30 mm | 0.25 mm |
| 38.1 mm | 2.0 mm | 1 mm |
| 12.7 mm | 0.75 mm | 0.3 mm |
| 63.5 mm | 4.0 mm | 2 mm |
| 25.4 mm | 1.5 mm | 0.5 mm |
| 76.2 mm | 5.0 mm | 4 mm |
| 50.8 mm | 3.0 mm | 1.5 mm |
| 127 mm | 7.0 mm | 6 mm |
| 101.6 mm | 6.0 mm | 5 mm |
Manufacturing Process of Super Duplex Tubes Explained
1. Raw Material Selection
High-quality stainless steel billets and strips are carefully selected for superior strength and corrosion resistance.
2. Tubes Formation
The selected raw material is formed into tubes using seamless extrusion methods, depending on the application.
3. Heat Treatment
Tube undergoes required controlled heat treatment to enhance mechanical properties and relieve internal stresses.
4. Cold Working and Finishing
After heat treatment, tubes are cold-worked for better surface finish, dimensional accuracy and improved strength.
5. Quality Control and Testing
Every tube is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.
Where all is Super Duplex Stainless Steel Tubes Used?
Oil and Gas Industry
Marine & Shipbuilding
Chemical and Petrochemical Industry
Power Generation & Heat Exchange
Aerospace & Defense
Pulp & Paper Mill Equipment
Desalination Equipment
Food and Beverage Industry
Pharmaceutical & Biotechnology
FAQ
What industries use Super Duplex Steel Tubes?
What industries use Super Duplex Steel Tubes?
Super Duplex Steel Tubes are used in offshore oil rigs, chemical plants, and desalination units. They are also common in pulp and paper mills, marine systems, and gas processing facilities. Any area facing harsh corrosion, seawater, or high stress benefits from these tubes.
What is super duplex tubing?
What is super duplex tubing?
Super duplex tubing is a high-strength stainless steel tube with a mix of austenitic and ferritic structures. It offers strong corrosion resistance, great strength, and crack resistance. This tubing works well in aggressive and high-pressure environments.
Can Thaida supply customized Super Duplex Steel Tubes?
Can Thaida supply customized Super Duplex Steel Tubes?
Yes, custom sizes and grades are available for special project needs. You can request custom thickness, length, and finishing for exact use cases. The goal is to make sure the tube suits your system needs without hassle.
What are the benefits of super duplex steel tube?
What are the benefits of super duplex steel tube?
These tubes offer high strength, strong corrosion resistance, and great life in harsh service. They handle seawater, chemicals, and high stress without quick wear. They also reduce repair work and downtime, making them cost-efficient long term.
What is the maximum operating temperature of Super Duplex Steel Tubes?
What is the maximum operating temperature of Super Duplex Steel Tubes?
Most grades can handle up to about 250°C in continuous service. Higher heat may reduce strength and corrosion resistance, so staying within limits keeps performance safe and steady. Always check the exact grade for final temperature values.
What is the difference between SS and SDSS?
What is the difference between SS and SDSS?
SS means regular stainless steel, while SDSS stands for Super Duplex Stainless Steel. SDSS has higher strength and better corrosion resistance, especially in salty and chemical conditions. It lasts longer where ordinary stainless steel may fail faster.
What is super duplex tube used for?
What is super duplex tube used for?
These tubes are used in saltwater systems, chemical processing units, heat exchangers, and offshore platforms. It also support water treatment units, fire-fighting systems, and pressure piping. Its strength and corrosion resistance make them ideal for tough setups.