UNS S32304 Alloy 2304 Duplex Stainless Steel Plate 1.0-80.0mm

Overview of Alloy 2304

Chemical Composition (Typical, % by Weight)

• Chromium (Cr): 21.5 - 23.5
• Nickel (Ni): 3.0 - 5.0
• Molybdenum (Mo): 0.05 - 0.6
• Manganese (Mn): ≤ 2.0
• Silicon (Si): ≤ 1.0
• Carbon (C): ≤ 0.03
• Nitrogen (N): 0.08 - 0.20
• Phosphorus (P): ≤ 0.03
• Sulfur (S): ≤ 0.015

Mechanical Properties

• Tensile Strength: ≥ 600 MPa
• Yield Strength (0.2% offset): ≥ 400 MPa
• Elongation: ≥ 25% (in 50mm gauge length)
• Hardness: ≤ 290 HV (Brinell hardness: ≤ 280 HB)

Product Standards of UNS S32304 Stainless Steel Plate

• ASTM A240 / A240M (Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications)
• EN 10088-2 (Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion-resistant steels for general purposes)
• JIS G4305 (Stainless steel plates, sheets and strips)

Equivalent

• DIN: 1.4362
• EN: X2CrNiN23-4
• GB/T: 022Cr23Ni4N

Product Features

1. Balanced Microstructure: Consists of approximately 50% austenite and 50% ferrite, combining the corrosion resistance of austenitic steels with the high strength of ferritic steels.
2. Excellent Corrosion Resistance: Resistant to general corrosion, pitting, and crevice corrosion in environments such as freshwater, seawater, and mild chemical solutions. It performs well in chloride-containing environments compared to 304 austenitic stainless steel.
3. High Strength: Offers twice the yield strength of 304 or 316 austenitic stainless steels, reducing material thickness and weight in structural designs.
4. Good Weldability: Can be welded using common methods (e.g., TIG, MIG) with minimal risk of sensitization, thanks to its low carbon content.
5. Cost-Effective: Contains lower nickel content than 316 stainless steel, providing a more economical alternative without compromising performance in many applications.

Applications

• Oil and Gas Industry: Pipelines, storage tanks, and offshore platforms (resistant to seawater and hydrocarbon environments).
• Chemical Processing: Reactors, tanks, and piping for handling mild acids and corrosive fluids.
• Water Treatment: Desalination plants, water pipelines, and wastewater equipment (resistant to chloride-induced corrosion).
• Construction: Structural components, architectural cladding, and bridges (high strength reduces material usage).
• Food and Beverage Industry: Equipment for processing and storage, where hygiene and corrosion resistance are critical.