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Duplex Steel 2304 Sheet & Plate

Duplex Steel 2304 Sheet & Plate
Design Standards: ASTM A240, ASME SA240, EN 10088-2
Material Grade: Lean Duplex 2304 (UNS S32304 / 1.4362)
Alloy Strategy: Lean Duplex (Economical Nickel & Moly Content)
Strength Profile: Yield Strength approx. 2x Grade 304/316
Thickness Range: 0.5 mm to 60 mm
Surface Finish: No.1 (HRAP), 2B, BA, No.4, Polished
Key Property: Superior Stress Corrosion Cracking (SCC) Resistance
Core Applications: Storage Tanks, Bridges, Food & Drink, Water Treatment
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Duplex Steel 2304 Sheet & Plate is a high-performance "Lean Duplex" stainless steel characterized by its balanced 50:50 austenitic-ferritic microstructure. Designed as a cost-effective alternative to standard austenitic grades like SS 316L, Grade 2304 offers significantly higher mechanical strength and superior resistance to stress corrosion cracking (SCC). By minimizing the content of expensive alloying elements like nickel and molybdenum, while maintaining high chromium levels, these plates provide an optimized balance of durability and economic value for large-scale structural and industrial projects.

Manufactured in compliance with ASTM A240 and ASME SA240, Duplex 2304 plates possess nearly double the yield strength of Grade 304, allowing for thinner wall thicknesses and substantial weight savings in vessel and tank fabrication. Its excellent fatigue resistance and thermal conductivity make it highly efficient for heat exchangers and structural components in water treatment, food processing, and architectural applications. Whether utilized in bridges, storage silos, or chemical piping, our Duplex 2304 sheets provide the long-term integrity of duplex technology with the price stability of a lean-alloyed material.



Duplex Steel 2304 Sheet & Plate Features

  • » High Mechanical Strength: Possesses nearly twice the yield strength of Grades 304 and 316, allowing for thinner plate designs and significantly lower overall material weight.
  • » Excellent Stress Corrosion Cracking (SCC) Resistance: The ferritic-austenitic structure provides inherent protection against chloride-induced SCC, far outperforming standard 300-series austenitic steels.
  • » Cost Stability: As a "Lean Duplex" grade with low nickel and molybdenum content, it offers more stable and predictable pricing compared to high-nickel stainless alloys.
  • » Good General Corrosion Resistance: Provides corrosion resistance comparable to SS 316L in most environments, making it ideal for water treatment and chemical storage.
  • » Superior Fatigue & Erosion Resistance: High hardness and mechanical integrity ensure long-lasting performance in applications involving high-velocity fluids or cyclic mechanical stress.
  • » Improved Thermal Conductivity: Higher thermal conductivity than austenitic grades allows for better heat distribution and efficiency in heat exchangers and processing equipment.
  • » Good Weldability and Formability: Can be easily welded using standard methods and formed into complex shapes, provided the balanced microstructure is maintained through proper heat input.
  • » Broad Temperature Versatility: Maintains excellent mechanical properties and corrosion resistance in service temperatures ranging from -50°C to 300°C.

Duplex Steel 2304 Sheet & Plate Specification

Standard Specs

  • ASTM: A240 / A240M
  • ASME: SA240 / SA240M
  • UNS Number: S32304
  • Werkstoff No: 1.4362

Chemical Profile

  • Chromium (Cr): 21.5% – 24.5%
  • Nickel (Ni): 3.0% – 5.5%
  • Molybdenum (Mo): 0.05% – 0.60%
  • Nitrogen (N): 0.05% – 0.20%

Mechanical Data

  • Tensile Strength: 600 MPa (Min)
  • Yield Strength: 400 MPa (Min)
  • Elongation: 25% (Min)
  • Hardness: 290 Brinell (Max)

Size Range

  • Thickness: 0.5mm to 60mm
  • Width: 1000mm, 1250mm, 1500mm, 2000mm
  • Length: 2000mm to 6000mm
  • Forms: Plates, Sheets, Coils, Strips

Surface & Finish

  • Industrial: No.1 (HRAP), 2B (Cold Rolled)
  • Polished: No.4 (Brushed), Satin, Mirror
  • Protection: PVC / Laser Fiber Film
  • Edges: Mill, Slit, or Plasma Cut

Quality Control

  • PREn Value: 24 – 26
  • Testing: PMI, Impact, Tensile, Microstructure
  • Certification: EN 10204 3.1 MTC
  • Inspection: Ultrasonic (UT) & NDT

Duplex Steel 2304 Sheet & Plate Detailed Specifications

Property Specification
Specifications ASTM A240 / ASME SA240
Width 1000mm / 1219mm /1250mm / 1500mm / 2000mm
Length 2000 mm / 2440 mm / 2500 mm / 3000 mm / 6000 mm
Thickness 0.1mm to 12 mm Thk
Hardness Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc.
Finish Hot rolled plate (HR), Cold rolled sheet (CR).
Form Coils, Foils, Rolls, Plain Sheet, Strip, Flats, Blank (Circle), Ring (Flange) etc.

Duplex Steel 2304 Sheet & Plate Chemical Composition

Element Composition %
C (Carbon) Max 0.03
Cr (Chromium) 22.0 - 23.0
Ni (Nickel) 4.5 - 6.5
Fe (Iron) Balance
Mo (Molybdenum) 0.3 - 0.8
Mn (Manganese) 2.0 - 4.0
Si (Silicon) 1.0
P (Phosphorus) Max 0.03
S (Sulfur) Max 0.01
Cu (Copper) Max 0.50

Industrial Locations & Keywords

Industrial Locations & Keywords
Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair)
Jeddah Industrial Cities (1st, 2nd & 3rd)
Dammam Industrial Areas (1st, 2nd & 3rd)
Jubail Industrial City
Yanbu Industrial City
Rabigh Industrial City
Al Khobar Industrial Area
Al Ahsa Industrial City
Madinah Industrial City
Makkah Industrial City
Taif Industrial City
Tabuk Industrial City
Jazan Industrial City
Industrial supplier in Saudi Arabia
Pipe fittings supplier in Jubail / Dammam / Riyadh
Flange and valve supplier Saudi Arabia
Fast delivery industrial materials KSA
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