654SMO Stainless Steel Plate UNS S32654 1.4652 SS Plate Thickness 1.0 80.0mm

Product Specification

654SMO Stainless Steel Plate (UNS S32654, 1.4652) SS PlateThickness 1.0 - 80.0mm

Products Specification

Comprehensive Overview of S32654 Stainless Steel Plate

1. Product Description

S32654 (commonly known as 654SMO) is a super-austenitic stainless steel characterized by ultra-high corrosion resistance, surpassing conventional austenitic grades (e.g., 316L) and even duplex steels. Its composition includes elevated chromium (23–25%), nickel (21–23%), molybdenum (7–8%), and nitrogen (0.45–0.55%), enabling performance comparable to nickel-based alloys like Inconel or Hastelloy in aggressive environments. Key advantages include:

• Exceptional pitting/crevice corrosion resistance in chloride-rich media (e.g., seawater, acids)16.

• High strength (yield strength ≥430 MPa) due to nitrogen enhancement, outperforming 254SMO and 904L38.

• Excellent weldability and toughness across cryogenic to elevated temperatures69.

 2. Key Parameters

Chemical Composition (%)135:

Physical & Mechanical Properties1710:

• Density: 8.24 g/cm³

• Melting Point: 1320–1390°C

• Tensile Strength: ≥750 MPa

• Yield Strength: ≥430 MPa

• Elongation: ≥40%

• Hardness: ≤250 HB

• Magnetism: Non-magnetic

3. Standards & Specifications

S32654 plates comply with international standards for quality assurance:

• Plate Standards: ASTM A240, ASTM A480, ASME SA-240210.

• Other Product Forms:

  • Tubes: ASTM A312, A358

  • Bars: ASTM A276, A47925.

• Dimensional Tolerance: Adheres to ASTM/EN thickness and flatness norms.

 4. Packaging

Plates are protected to prevent damage during transit:

• Standard Packaging: Wooden crates or pallets with rust-proof paper wrapping and waterproof plastic covering. Edges are guarded with protective strips48.

• Customization: Cut-to-size plates, surface polishing (e.g., No. 4 finish), or specific coating upon request310.

 5. Equivalent Grades

Global designations for S32654 include259:

• UNS: S32654

• EN: X1CrNiMoCuN24-22-8 (1.4652)

• China: 015Cr24Ni22Mo8Mn3CuN (GB/T)

• Japan: JIS-designated equivalents under development.

6. Applications

S32654 plates are critical in extreme corrosion environments:

• Offshore/Marine: Seawater piping, heat exchangers, submarine components16.

• Energy: Flue gas desulfurization (FGD) systems, desalination plants, nuclear wastewater handling310.

• Chemical Processing: Reactors, scrubbers, and pipelines for acids/chlorides69.

• Industrial: Bleaching equipment (pulp/paper), high-pressure RO systems, salt/酱油 brewing tanks48.

Why Choose S32654 Plates?

This alloy bridges the gap between standard stainless steels and costlier nickel alloys, offering >55 PRE (Pitting Resistance Equivalent) for longevity in critical infrastructure69. Its versatility in fabrication (welding, forming) and compliance with global standards make it ideal for engineers prioritizing safety and lifecycle cost.