Duplex Steel S31803 Plates

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Duplex Steel S31803 Plates Specification

Product Form
Plates / Sheets

Size
Custom length & width: up to 2500 mm width & up to 12000 mm length

Tensile Strength
620 MPa minimum

Recyclable
Yes

Material Composition %
Chromium 21.0-23.0%, Nickel 4.5-6.5%, Molybdenum 2.5-3.5%, Nitrogen 0.08-0.20%, Manganese 2.0%, Carbon 0.03%, Silicon 1.0%, Phosphorous 0.03%, Sulfur 0.02%, balance Iron

Corrosion Resistant
Excellent, including pitting and crevice corrosion

Hardness
Brinell 293 Max (HBW)

Heat Resistance
Good up to 300C (572F)

Diameter
N/A (as plate)

Coating Type
Uncoated / Custom coating on request

Product Name
Duplex Steel S31803 Plates

Steel Type
Duplex Stainless Steel

Steel Product Type
Plate

Grade
S31803

Thickness
3 mm to 100 mm

Shape
Rectangular / Square / Custom Cut

Steel Standard
ASTM A240, ASME SA240

Surface
Hot Rolled, Cold Rolled, Pickled, Annealed

Composition
22% Cr, 5-6% Ni, 3% Mo, balance Fe

Application
Oil & Gas, Chemical Processing, Marine, Petrochemicals, Power Generation, Heat Exchangers, Pressure Vessels

Dimension (L*W*H)
Customizable, as per client requirements

Weight
As per dimensions and thickness

Color
Silver/Grey

Material Grade
Duplex Steel UNS S31803

Finish Type
Mill Finish, Brushed, 2B, No. 1, No. 4

Usage
Structural, Fabrication, Industrial applications

About Duplex Steel S31803 Plates

What Are Specification Duplex Steel S31803 Plates?

Specification	ASTM A240 / ASME SA240
Length	2000 mm / 2440 mm / 2500 mm / 3000 mm / 6000 mm.
Width	1000mm / 1219mm /1250mm / 1500mm / 2000mm
Thickness	Ranging from 0.3mm to 20mm
Hardness	As per ASME A & NACE MR 175
Finish	Hot rolled plate (HR), Cold rolled sheet (CR)

Equivalent material Of Duplex Steel S31803 Plates?

STANDARD	WERKSTOFF NR.	UNS
Duplex Steel	1.4462	S31803 / S32205

Chemical Composition Of Duplex Steel S31803 Plates?

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	N	Fe
Duplex Steel S31803	0.030 max	2.00 max	1.00 max	0.030 max	0.020 max	22 23	3 3.5	4.50 6.50	0.14 0.20	63.72 min

Mechanical Properties Of Duplex Steel S31803 Plates?

Density	Melting Point (C)	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
7.8 g/cm 3	1350 C (2460 F)	Psi 80000 , MPa 550	Psi 116000 , MPa 800	15 %

Superior Corrosion and Impact Resistance

Duplex Steel S31803 Plates deliver outstanding resistance to pitting, crevice corrosion, and general wear, making them suitable for challenging marine, oil & gas, and chemical processing environments. The superior impact toughness at room and sub-zero temperatures assures reliability in structurally critical applications.

Precision Manufacturing and Customizability

Manufactured as per ASTM A240 and ASME SA240 specifications, these plates are available in hot/cold rolled, annealed, and pickled conditions with a range of surface finishes like Mill, Brushed, 2B, No.1, and No.4. Dimensions, edge types, and finishes are tailored to client needs, supporting up to 2500 mm width and 12000 mm length.

Sustainable and Cost-Effective Solution

Duplex Steel S31803 is recyclable, aligning with green manufacturing practices. With a minimum elongation of 25% (in 50mm), high tensile strength, and robust weldability, these plates minimize maintenance and replacement costs, offering long-term value in pressure vessels, heat exchangers, and power generation sectors.

FAQs of Duplex Steel S31803 Plates:

Q: How do Duplex Steel S31803 Plates perform in corrosive or harsh environments?

A: Duplex Steel S31803 Plates exhibit excellent corrosion resistance, including resistance to pitting and crevice corrosion. Their robust chemical composition makes them particularly suitable for use in oil & gas, chemical processing, and marine industries where exposure to harsh chemicals or saline conditions is common.

Q: What are the available thicknesses and dimension customization options for these plates?

A: These plates can be produced in thicknesses ranging from 3 mm to 100 mm and can be customized in width up to 2500 mm and length up to 12000 mm. Dimensions and shapes, including rectangular, square, or custom cuts, are tailored as per client requirements.

Q: When is it advisable to use Duplex Steel S31803 Plates over standard stainless steel?

A: It is recommended to use Duplex Steel S31803 Plates in environments where higher mechanical strength, excellent corrosion resistance, and reliable impact toughness are essential. They outperform standard stainless steel in demanding applications such as pressure vessels, heat exchangers, and marine structures.

Q: Where are Duplex Steel S31803 Plates commonly utilized?

A: Common applications include oil & gas facilities, chemical processing plants, marine engineering, petrochemical units, power generation infrastructure, heat exchangers, and fabrication of pressure vessels. Their versatility makes them suitable for numerous industrial and structural uses.

Q: What is the typical process for welding Duplex Steel S31803 Plates?

A: These plates have good weldability and can be welded using all common welding methods, such as TIG, MIG, and arc welding. It is important to follow recommended procedures to maintain corrosion resistance and mechanical properties, particularly avoiding weld heat input that exceeds guidelines.

Q: How do these plates contribute to sustainable and cost-effective projects?

A: Duplex Steel S31803 Plates are fully recyclable, promoting environmental sustainability. Their high elongation (25% min.), excellent mechanical strength, and durability reduce the frequency of replacement and associated maintenance costs, ultimately providing long-term value to industrial projects.

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