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Manufacturer of ASTM A790 S31803 Duplex Pipes EN 10204 3.2 Certified UNS S31803

Manufacturer of ASTM A790 S31803 Duplex Pipes EN 10204 3.2 Certified UNS S31803

  • Manufacturer of ASTM A790 S31803 Duplex Pipes EN 10204 3.2 Certified UNS S31803
  • Manufacturer of ASTM A790 S31803 Duplex Pipes EN 10204 3.2 Certified UNS S31803
  • Manufacturer of ASTM A790 S31803 Duplex Pipes EN 10204 3.2 Certified UNS S31803
  • Manufacturer of ASTM A790 S31803 Duplex Pipes EN 10204 3.2 Certified UNS S31803
Manufacturer of ASTM A790 S31803 Duplex Pipes EN 10204 3.2 Certified UNS S31803
Productdetails:
Plaats van herkomst: China
Merknaam: YUHONG
Certificering: ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Modelnummer: ASTM A790 S31803
Betalen & Verzenden Algemene voorwaarden:
Min. bestelaantal: 100 kg
Prijs: Onderhandelbaar
Verpakking Details: Vouw-houten het Gevalbundel van Geval/Iron met plastic GLB/Geweven Geval
Levertijd: Hangt af van de hoeveelheid
Betalingscondities: L/c, t/t
Levering vermogen: 1000 ton per maand
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Gedetailleerde productomschrijving
Materiële standaard: ASTM A790/ASME SA790 UNS-nummer: S31803
Gelijkwaardige graad: EN 1.4462 | UNS S32205 | Duplex 2205 Buistype: Naadloos | Gelast
Certificatieniveau: EN 10204 3.1 | 3.2 | Norsok Het Beëindigen eindigt: Gewoon gesneden | Afgeschuind (30-35 °) | Schroefdraad (NPT/BSP)
Markeren:

ASTM A790 duplex stainless steel pipes

,

EN 10204 3.2 certified S31803 pipes

,

UNS S31803 seamless stainless pipes


ASTM A790 S31803 Duplex Stainless Steel Pipe | UNS S31803 | High Strength Corrosion Resistant Pipes



Meta Description:


Manufacturer of ASTM A790 S31803/2205 duplex steel pipes. Certified EN 10204 3.1, 100% hydro tested, PREN >38. Ideal for offshore, chemical & oil/gas. Request specs.



Product Overview


Our ASTM A790 seamless duplex pipes (UNS S31803) combine austenitic and ferritic microstructures, delivering 2x the yield strength of 316L stainless steel with exceptional chloride stress corrosion cracking (SCC) resistance. Ideal for high-pressure, corrosive environments.

Key Advantages:


  • PREN >38 (Pitting Resistance Equivalent)


  • 100% Hydrostatic Testing per ASTM A790


  • Low-Temperature Toughness (-50°C / -58°F)


  • Certified Traceability: EN 10204 3.1 MTC



Chemical Composition (Wt. %) – Optimized for Corrosion Resistance


Table: Balanced Chemistry of S31803 Duplex Steel Pipe


Element Min Max Target Role in Performance
Cr 21.0 23.0 22.0 Pitting/Corrosion Resistance
Ni 4.5 6.5 5.5 Austenite Stability
Mo 2.5 3.5 3.0 Chloride Resistance
N 0.08 0.20 0.15 Strength & PRE Boost
Mn - 2.0 1.2 Deoxidation
C - 0.030 0.02 Weldability
S - 0.020 0.001 Machinability
P - 0.030 0.025 -
Fe Balance




Equivalent Grades – Global Compliance


Table: Cross-Standard Material Equivalents


Standard Grade Common Name Similarity
UNS S31803 Duplex 2205 Identical
EN 1.4462 X2CrNiMoN22-5-3 Direct Equivalent
ASME SA790 - Parent Spec
GOST 03Kh22N6M2 - Comparable
JIS SUS 329J3L - Near Match



Mechanical Properties – Engineered for Extreme Service


Table: Room-Temperature Mechanical Properties per ASTM A790


Property Requirement Typical Value Advantage vs. 316L
Tensile Strength ≥ 620 MPa 750-895 MPa +40% Higher
Yield Strength (0.2%) ≥ 450 MPa 550-625 MPa 2x Higher
Elongation (%) ≥ 25% 28-35% Superior Ductility
Hardness (Rockwell C) ≤ 32 HRC 28-32 HRC Optimal for Sour Service
Impact Toughness ≥ 100 J (-50°C) ≥140 J Arctic Readiness



Dimensional Tolerances – Precision Manufacturing


Table: Permissible Variations per ASTM A790/ASME B36.19


Parameter Tolerance (Seamless Pipe) Critical Application Focus
OD (Outer Diameter) ±0.8% or ±0.2mm* Fitting Compatibility
Wall Thickness +20% / -12.5% Pressure Integrity
Straightness ≤ 0.2% of length Offshore Installation
Cut Length +3mm / -0mm Welding Efficiency




Application Domains – Where S31803 Duplex Excels


Corrosion-Demanding Environments:


  • Offshore Oil & Gas: Seawater injection lines, risers, umbilicals


  • Chemical Processing: Acid coolers, chloride-bearing reactors


  • Power Generation: FGD (Flue Gas Desulfurization) systems


  • Pulp & Paper: Bleach plants, digesters


  • Desalination Plants: High-salinity brine heaters



Why Choose YUHONG Duplex S31803 Pipes?


  • Full Traceability


  • NACE MR0175/ISO 15156 Compliant (Sour Service)


  • Global Stock: Sizes 1/2" to 24" (DN15-DN600), SCH 10S to XXS


  • Custom Processing: Beveling, polishing, PMI testing


label:

naadloze roestvrij staalbuis,

Naadloze Boilerbuizen,

RVS naadloze buizen

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