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Duplex Steel Seamless Pipes
HUASHANG STEEL
7304419000
As a leading stockist and supplier in China, we offer a comprehensive range of Duplex Steel Seamless Pipes, combining the best of austenitic and ferritic stainless steel properties. Duplex steel, with its unique microstructure of approximately 50% austenite and 50% ferrite, provides a balanced combination of high strength, superior corrosion resistance, and excellent toughness. Our inventory includes various grades such as S31803 (2205) and S32750 (2507), available in diverse sizes and specifications to meet global industry standards like ASTM, EN, and ASME.
High Strength-to-Weight Ratio: Duplex steel seamless pipes offer up to twice the yield strength of conventional austenitic stainless steels, allowing for thinner wall thicknesses and lighter structures without compromising integrity. This reduces material costs and installation weights in offshore and structural applications.
Excellent Corrosion Resistance: The dual-phase microstructure provides enhanced resistance to chloride-induced stress corrosion cracking (SCC), pitting, and crevice corrosion compared to single-phase steels. They perform exceptionally well in chloride-rich environments, such as seawater, brine solutions, and industrial process waters.
Versatile Fabrication: Despite their high strength, duplex steel pipes can be readily welded, formed, and machined using standard techniques. Proper heat treatment during manufacturing ensures consistent mechanical properties and resistance to intergranular corrosion.
Stock Availability and Customization: As a reliable stockist, we maintain extensive inventories to facilitate quick delivery, while also offering customization services for special lengths, surface finishes, and certification requirements.
Our duplex steel seamless pipes are extensively used in the oil and gas industry, particularly for offshore platforms, subsea pipelines, and refinery equipment exposed to harsh marine and acidic conditions. In the chemical processing sector, they are suitable for handling organic and inorganic acids, alkalis, and salt solutions in reactors, distillation columns, and piping systems. The automotive industry utilizes these pipes for exhaust systems requiring high-temperature resistance and strength, while the power generation sector benefits from their durability in steam and water circuits. Additionally, they are ideal for architectural applications in coastal areas, where resistance to salt-laden air is crucial for long-term structural integrity.
Our pipe factory has 296 employees ,including 4 senior engineers,18 engineers and 38 professional technicians.
We can produces 30,000tons of austenitic steel and duplex steel pipes annually with 18 seamless production lines and 3 perforation production lines.
Our pipe factory has been certified to the ISO9001:2015 quality management system and certified by various classification societies (such as BV, ABS,CCS,DNV/GL,TUV,LR,KR etc).
Chemical Composition | ||||||||||
Grade | C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu |
Max | Max | Max | Max | Max | Max | Max | ||||
S32205 | 0.03 | 1.00 | 2.00 | 0.03 | 0.02 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 | 0.50 |
S31803 | 0.03 | 1.00 | 2.00 | 0.03 | 0.02 | 21.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 | 0.50 |
S32750 | 0.03 | 0.80 | 1.20 | 0.035 | 0.02 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 | 0.50 |
Mechanical Properties | |||||||
Grade | Density | Temperature | Coefficient Of Thermal Expansion | Annealing Temperature | Tensile Strength | Yield Strength | Elongation |
g/cm | ℃ | mm/m℃ | ℃ | >nPm(Mpa)Min | Rp0.2(>Mpa)Min | Min% | |
S32205 | 7.8 | 20-100 | 13.7 | 1025-1100 | 655 | 485 | 25 |
S31803 | 7.8 | 20-100 | 13.7 | 1025-1100 | 655 | 485 | 25 |
S32750 | 7.8 | 20-100 | 11.5 | 1025-1125 | 800 | 50 | 15 |
Specifications Of Duplex Steel Seamless Pipe |
OD: 6mm-325mm
WALL THICKNESS: 0.5mm-20mm
Max Length:12m (Special specifications are available as required)
STANDARD: ASTM A789,ASTM A790
Material: S31500, S32101, S32003, S32304, S31803, S32205, S32750, S32760
Production Processes |
As a leading stockist and supplier in China, we offer a comprehensive range of Duplex Steel Seamless Pipes, combining the best of austenitic and ferritic stainless steel properties. Duplex steel, with its unique microstructure of approximately 50% austenite and 50% ferrite, provides a balanced combination of high strength, superior corrosion resistance, and excellent toughness. Our inventory includes various grades such as S31803 (2205) and S32750 (2507), available in diverse sizes and specifications to meet global industry standards like ASTM, EN, and ASME.
High Strength-to-Weight Ratio: Duplex steel seamless pipes offer up to twice the yield strength of conventional austenitic stainless steels, allowing for thinner wall thicknesses and lighter structures without compromising integrity. This reduces material costs and installation weights in offshore and structural applications.
Excellent Corrosion Resistance: The dual-phase microstructure provides enhanced resistance to chloride-induced stress corrosion cracking (SCC), pitting, and crevice corrosion compared to single-phase steels. They perform exceptionally well in chloride-rich environments, such as seawater, brine solutions, and industrial process waters.
Versatile Fabrication: Despite their high strength, duplex steel pipes can be readily welded, formed, and machined using standard techniques. Proper heat treatment during manufacturing ensures consistent mechanical properties and resistance to intergranular corrosion.
Stock Availability and Customization: As a reliable stockist, we maintain extensive inventories to facilitate quick delivery, while also offering customization services for special lengths, surface finishes, and certification requirements.
Our duplex steel seamless pipes are extensively used in the oil and gas industry, particularly for offshore platforms, subsea pipelines, and refinery equipment exposed to harsh marine and acidic conditions. In the chemical processing sector, they are suitable for handling organic and inorganic acids, alkalis, and salt solutions in reactors, distillation columns, and piping systems. The automotive industry utilizes these pipes for exhaust systems requiring high-temperature resistance and strength, while the power generation sector benefits from their durability in steam and water circuits. Additionally, they are ideal for architectural applications in coastal areas, where resistance to salt-laden air is crucial for long-term structural integrity.
Our pipe factory has 296 employees ,including 4 senior engineers,18 engineers and 38 professional technicians.
We can produces 30,000tons of austenitic steel and duplex steel pipes annually with 18 seamless production lines and 3 perforation production lines.
Our pipe factory has been certified to the ISO9001:2015 quality management system and certified by various classification societies (such as BV, ABS,CCS,DNV/GL,TUV,LR,KR etc).
Chemical Composition | ||||||||||
Grade | C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu |
Max | Max | Max | Max | Max | Max | Max | ||||
S32205 | 0.03 | 1.00 | 2.00 | 0.03 | 0.02 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 | 0.50 |
S31803 | 0.03 | 1.00 | 2.00 | 0.03 | 0.02 | 21.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 | 0.50 |
S32750 | 0.03 | 0.80 | 1.20 | 0.035 | 0.02 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 | 0.50 |
Mechanical Properties | |||||||
Grade | Density | Temperature | Coefficient Of Thermal Expansion | Annealing Temperature | Tensile Strength | Yield Strength | Elongation |
g/cm | ℃ | mm/m℃ | ℃ | >nPm(Mpa)Min | Rp0.2(>Mpa)Min | Min% | |
S32205 | 7.8 | 20-100 | 13.7 | 1025-1100 | 655 | 485 | 25 |
S31803 | 7.8 | 20-100 | 13.7 | 1025-1100 | 655 | 485 | 25 |
S32750 | 7.8 | 20-100 | 11.5 | 1025-1125 | 800 | 50 | 15 |
Specifications Of Duplex Steel Seamless Pipe |
OD: 6mm-325mm
WALL THICKNESS: 0.5mm-20mm
Max Length:12m (Special specifications are available as required)
STANDARD: ASTM A789,ASTM A790
Material: S31500, S32101, S32003, S32304, S31803, S32205, S32750, S32760
Production Processes |
