Metinox Overseas is a renowned manufacturer, supplier, stockist, and exporter of high-grade quality Duplex Steel UNS S31803 Welded Tubes, known for delivering exceptional performance and long-lasting durability across a wide range of industrial applications.

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Our Duplex Steel UNS S31803 Welded Tubes are crafted using premium quality raw materials and advanced manufacturing techniques, ensuring superior strength, excellent corrosion resistance, and outstanding mechanical properties. These tubes are a highly demanded product in the market due to their dual-phase microstructure, which combines the best properties of austenitic and ferritic stainless steels.

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This unique composition provides enhanced resistance to stress corrosion cracking, pitting, and crevice corrosion, making them ideal for use in harsh and corrosive environments such as marine industries, offshore oil drilling, chemical processing, and petrochemical sectors. At Metinox Overseas, we maintain stringent quality standards throughout the production process, ensuring that each Duplex Steel UNS S31803 Welded Tube meets international standards such as ASTM, ASME, and other global specifications.

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The Duplex Steel UNS S31803 Welded Tubes from Metinox Overseas are widely recognized for their robust construction, longevity, and low maintenance costs, which significantly reduce the total cost of ownership over their operational life. Whether it’s for high-pressure systems or aggressive chemical environments, our welded tubes are trusted for their superior quality and consistent performance. As a trusted name in the steel industry.

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Metinox Overseas continues to set benchmarks in innovation, reliability, and customer-centric service. Our commitment to excellence and adherence to international quality norms have made us a preferred choice among engineers, fabricators, and procurement professionals across the globe. Choose Metinox Overseas for premium Duplex Steel UNS S31803 Welded Tubes that offer unmatched value and performance, in the most demanding applications.

Duplex Steel UNS S31803 Welded Tubes Specification

Specifications ASTM A790 / ASME SA790
Dimensions ASTM, ASME and API
Seamless & Welded Pipe Size 6" NB - 24" NB
Outer Diameter 6.0-630mm
Thickness 0.3mm – 50 mm
Length Single Random, Double Random & Required Length
Schedule SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH120, SCH140, SCH160, XXS
Type Seamless, Welded, ERW, EFW
Form Round Pipes, Square Pipes, Rectangular Pipe
End Plain End, Beveled End, Treaded

Duplex Steel UNS S31803 Tubes Equivalent Grades

STANDARD WERKSTOFF NR. UNS
S31803 1.4462 S31803

Duplex Stainless Steel S31803 Tubes Chemical Composition

Element Grade C Si Mn P S Cr Mo Ni N Other
S31803 2507 0.030 0.80 1.20 0.035 0.020 24.0
-26.0
3.0
/5.0
6.00
/8.00
0.24
/0.32
Cu:0.50

Duplex Steel S31803 Tubes Mechanical & Physical Properties

No Grade Proof Stress
0.2% (MPa)
Tensile Strength
(MPa)
Elongation
A5(%)
Hardness Max
HB HRB
S31803 2507 550 795 15 310 32*

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