Home >Duplex Steel > Duplex Steel Sheet and Plates
Duplex steel sheets and platesare flat, thin sections of material produced from duplex stainless steel. Duplex stainless steel is a category of stainless steel featuring a two-phase microstructure made up of approximately equal amounts of austenite and ferrite phases. This dual-phase composition delivers a blend of outstanding corrosion resistance and high strength, which makes duplex steel sheets/plates extremely well suited for a broad variety of uses across numerous industries.
| Specifications | ASTM B171, B122 / ASME SB171, SB122 |
| Standards | ASTM, ASME and API |
| Size | 1 mm to 100 mm |
| Finishing | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| Form | Coils, Foils, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) & Angle, Channel, Tray, Roll Etc. |
| Hardness | Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc. |
| Grade | UNS NO. C92200 & UNS NO. C83600, UNS NO. C70600 ( CU -NI- 90/10), C71500 ( CU -NI- 70/30), UNS NO C10100, C10200, C10300, C10800, C12000, C12200. |
| MN | C | SI | S | P | CR | NI | MO | N |
|---|---|---|---|---|---|---|---|---|
| 2.0 max | 0.03 max | 1.0 max | 0.02 max | 0.03 max | min: 21.0 max: 23.0 | min: 4.5 max: 6.5 | min: 2.5 max: 3.5 | min: 0.08 max: 0.20 |
At Koasteel, we take pride in being the largest supplier and manufacturer in the New Zealand, delivering innovative solutions for every one of your piping requirements. With advanced production facilities strategically positioned throughout the New Zealand, we maintain an extensive stock of more than 25,000 tons of top-quality materials kept readily on hand.
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We supply These Duplex Steel Sheet and Plates conforming to DIN, ISO, JIS or ANSI Standard.
Excellent Corrosion Resistance:Duplex stainless steel provides better resistance to corrosion than standard austenitic stainless steels, especially in chloride-heavy settings such as seawater and chemical processing.
High Strength:Duplex steel sheets/plates possess greater strength than austenitic stainless steels, which permits thinner material gauges and lower weight in structural uses while preserving structural integrity.
Cost-Effectiveness:Although duplex stainless steel might carry a higher upfront cost than austenitic stainless steels, its enhanced corrosion resistance and mechanical properties frequently lead to long-term savings by lowering maintenance, repair, and replacement expenses.
Versatility:Duplex steel sheets/plates are adaptable and suit a broad spectrum of applications across many industries, such as oil and gas, chemical processing, marine engineering, pulp and paper, and architectural applications.
Weldability:Duplex steel sheets/plates weld easily with standard welding methods, enabling straightforward fabrication and assembly into intricate structures without sacrificing corrosion resistance or mechanical properties.
Duplex steel sheets/plates are utilized extensively throughout industry in numerous sectors thanks to their distinctive blend of outstanding corrosion resistance, superior strength, and adaptability. Typical industrial applications encompass uses within the oil and gas sector for offshore platforms, pipelines, and subsea equipment, where strength and corrosion resistance are critical for enduring severe conditions.
Oil and Gas Industry:Duplex steel sheets/plates find application in offshore platforms, subsea equipment, pipelines, and storage tanks thanks to their corrosion resistance and high strength, particularly in harsh environments where chloride ions and hydrogen sulfide are present.
Chemical Processing:Duplex steel sheets/plates are used within chemical processing plants to build pressure vessels, heat exchangers, and piping systems that carry corrosive chemicals, acids, and solvents.
Marine Engineering:For marine purposes, duplex steel sheets/plates serve in shipbuilding, seawater desalination plants, offshore structures, and marine equipment owing to their ability to withstand seawater corrosion and their high mechanical strength..
Power Generation:Within the power generation sector, duplex steel sheets/plates are applied in producing boilers, heat exchangers, turbine components, and exhaust systems because they resist high temperatures and corrosion in steam and flue gas environments..
Aerospace Industry:Within the aerospace sector, duplex steel sheets/plates are applied in producing aircraft components like landing gear, engine mounts, and structural elements because of their lightweight nature, high strength, and corrosion resistance.
Identify Application Requirements:Identify the operating conditions—such as temperature, pressure, corrosion, and mechanical stress levels—so you can select duplex steel sheets/plates capable of enduring these demands.
Grade Selection:Pick the right duplex stainless steel grade according to the particular needs of your application. Widely used grades include duplex stainless steel UNS S31803, UNS S32205, and UNS S32750, with each providing varying degrees of corrosion resistance, strength, and other characteristics.
Corrosion Resistance:Assess how well the duplex steel sheets/plates resist corrosion when exposed to the particular corrosive substances found in your application, such as acids, alkalis, chlorides, and seawater, to guarantee lasting performance and durability.
Mechanical Properties:Take into account the mechanical characteristics of the duplex steel sheets/plates, such as tensile strength, yield strength, elongation, and hardness, to confirm they satisfy your application’s mechanical needs.
Size and Thickness:Choose duplex steel sheets/plates with the right dimensions and thickness to suit your application requirements, factoring in aspects like load-bearing capacity, dimensional tolerances, and available space.
Yes, Duplex steel sheets and plates can work well for hygienic and sanitary uses, especially across industries like food and beverage, pharmaceuticals, and biotechnology.
Duplex stainless steel grades frequently chosen for sheets/plates include UNS S31803 (2205), UNS S32205, UNS S32750 (2507), and UNS S32760, with each providing particular properties and performance traits suited to varying applications.
Duplex steel sheets and platescan be manufactured and machined using standard techniques including cutting, bending, forming, welding, and machining. Suitable measures should be taken to prevent work hardening and tool wear.
Duplex steel sheets and platesare offered in a range of sizes and standards including ASTM, ASME, and EN standards. Typical sizes span from thin gauge sheets to thick plates, with widths and lengths that differ according to application requirements.
| Thickness | Width | Length | Surface Finish |
|---|---|---|---|
| 15~85 mm | 914, 1219, 1524 mm | 3048, 6069 mm 10 M | Black |
| 3~8 mm | 20~1524 mm | Container Loading: Max. 10M Bulk: as request | No.1 |
| 8 up ~ 60 mm | 30~1524 mm | Max. 6096 mm | No.1 |
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