Specifications of Duplex Steel Plate

The specifications of Duplex Steel Plate are mentioned in the table below, including standards, thickness and surface finish.

Parameter Specification
Material Grade Duplex Stainless Steel 2205 (UNS S32205 / S31803)
Standards ASTM A240 / ASME SA240
Thickness Range 3 mm to 100 mm
Width Range 1000 mm to 2500 mm
Length Range 2000 mm to 12000 mm
Form Plates, Sheets
Finish Types Hot Rolled (HR), Cold Rolled (CR), Pickled
Surface Condition Annealed, Pickled, Shot Blasted

Duplex Steel Plate Price

Standard 2205 duplex typically costs ₹750–1,500/kg in India and about $8–18/kg USD. Duplex plate prices depend on grade, thickness, quantity, surface finish, and current alloy surcharges. Because nickel and molybdenum prices change, customers should ask for a custom quote to get accurate, up-to-date pricing for their needs.

Duplex Steel Plate Grades

The grade covers duplex plate applications. Selection depends on corrosion severity and project budget.

Grade 2205 (Standard Duplex)

ASTM A240, UNS S32205 plate is the most widely specified duplex grade. Chromium at 22-23% and molybdenum at 3.0-3.5% give it a PREN of approximately 35. Typical uses include pressure vessels, heat exchangers, and storage tanks across chemical and oil and gas facilities.

Duplex Steel Plate Sizes

We stock duplex steel plate in the following size ranges:

Parameter Specification
Thickness 3 mm to 100 mm
Standard Thickness 6, 8, 10, 12, 16, 20, 25, 30, 40, 50, 60, 80, 100 mm
Width Up to 2500 mm
Standard Width 1000 mm, 1219 mm, 1500 mm, 2000 mm
Length Up to 12000 mm
Standard Length 2438 mm, 3000 mm, 6000 mm, 12000 mm
Custom Sizes Cut-to-size available as per project requirements

Duplex Steel Plate Industrial Applications

4 sectors account for the majority of duplex steel plate consumption. It requires high-performance and corrosion resistance.

Oil and Gas Industry

Offshore process vessels, manifolds, and platform fire-water systems use duplex stainless steel plate because it is strong and resists corrosion.

Chemical and Petrochemical Processing

Reactor shells and column internals use 2205 duplex plate. Reactor vessels and distillation column internals are fabricated from 2205 duplex stainless steel plate to offer high strength and corrosion resistance.

Desalination and Water Treatment

Duplex steel plate is used in evaporator vessels and brine heater units throughout desalination and water treatment facilities.

Marine and Offshore

Offshore platform structures and seawater-cooled heat exchangers require duplex stainless steel with high pitting corrosion resistance in aggressive marine environments.

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Duplex Steel Plate vs 316L Stainless Steel Plate

Duplex 2205 plate is about twice as strong as 316L (65 ksi vs 25 ksi) and resists chloride stress corrosion cracking better.

Property Duplex 2205 316L
Yield Strength 65 ksi (450 MPa) 25 ksi (170 MPa)
Chloride SCC Resistance High Moderate
PREN ~35 ~24
Initial Cost per kg Higher Lower
Plate Thickness Required Thinner sections possible Thicker sections needed

That higher strength allows thinner cross-sections, lowering material weight and fabrication cost over the project lifecycle.

Shipping & Packaging

Main export packaging setup Heavy-duty wooden boxes Packing
Export Packaging Standard

We strictly follow seaworthy export handling standards to protect duplex steel plate from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

  • Heavy-duty wooden boxes with moisture barrier lining
  • HDPE stretch film wrapping on all bundles
  • Edge and corner protection with plastic padding
  • Silica gel desiccants to minimize moisture exposure
  • ISPM-15 fumigated wooden packaging for export
shipping preparation Plate Bundle Yard Staging
Shipping packaging Plate Bundle Edge Protection
Shipping stock Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies duplex steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.

  • USA flagUSA
  • Canada flagCanada

Frequently Asked Questions

What grade is Duplex Steel Plate?+
Duplex steel plate is most commonly available in Grade 2205 (UNS S32205) per ASTM A240.
What is the difference between Duplex Plate and 316L Plate?+
Duplex 2205 plate has approximately twice the yield strength of 316L (65 ksi vs 25 ksi) and far better resistance to chloride stress corrosion cracking. The higher per-kilogram cost is offset by thinner plate sections, reducing material weight and fabrication expense.
What is Duplex Steel Plate used for?+
Duplex Steel Plate is used for pressure vessels, heat exchangers, storage tanks, and structural components in oil and gas, chemical processing, desalination, and marine sectors.
What is the price of Duplex Steel Plate per Kg?+
Standard duplex 2205 plate starts from ₹750 and goes up to 1,500/kg (approximately USD $8-18/kg). Contact us for a current quote based on your specific requirements.
What sizes are available in Duplex Steel Plate?+
Thickness ranges from 3 mm to 100 mm, widths up to 2500 mm, and lengths up to 12000 mm. Both standard mill sizes and cut-to-size are available from our Mumbai stock.
What ASTM standard covers Duplex Steel Plate?+
ASTM A240 / ASME SA-240 covers chromium and chromium-nickel stainless steel plate, sheet, and strip. Duplex Steel Plate 2205 falls under this specification.
Can Duplex Steel Plate be welded?+
Yes. Duplex plate can be welded if proper steps are followed: control the heat, use matching or higher‑alloy filler metals (such as ER2209 for 2205 plate), and keep the interpass temperature below 150 °C. These steps keep the right austenite‑ferrite balance in the weld area.
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