ASTM A182 F55 (UNS S32760) Specification for Flanges and Fittings

ASTM A182 F55 (UNS S32760) Specification for Flanges and Fitting

Super Duplex Stainless Steel F55 Forged Flanges & Fittings | Technical Specification PDF Download

The ASTM A182 F55 (UNS S32760) Specification  provides a comprehensive technical reference for super duplex stainless steel forgings used for pipe flanges, forged fittings, valves, and pressure components. This specification covers chemical composition, mechanical properties, heat treatment requirements, manufacturing process, dimensions and tolerances, testing and inspection, and typical applications in highly corrosive and high-pressure service environments.

ASTM A182 Standard

ASTM A182 is the standard specification for forged or rolled alloy and stainless steel pipe flanges, forged fittings, valves, and parts intended for high-temperature and corrosive service. Materials manufactured to ASTM A182 are widely used in critical piping systems requiring high strength and superior corrosion resistance.

Grade F55 is a super duplex stainless steel grade covered under ASTM A182 and corresponds to UNS S32760.

Material Grade: ASTM A182 F55 (UNS S32760)

  • Standard: ASTM A182 / ASME SA182

  • Grade: F55

  • UNS Number: S32760

  • Material Type: Super Duplex Stainless Steel

  • Product Form: Forged Flanges, Forged Fittings, Valves, and Components

ASTM A182 F55 (UNS S32760) offers excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking, along with very high mechanical strength.

Chemical Composition (Typical, %)

Chemical Composition Limits
Weight% C Mn P S Si Cr Ni Mo N W
Super Duplex F55 0.03 max 1.00 max 0.03 max 0.01 max 1 max 24-26 4.5-6.5 3-4 0.25 0.08-0.20

Chemical limits are defined by ASTM A182 for Grade F55 (UNS S32760).

Mechanical Properties (Minimum Requirements)

Grade Heat Treat Type Solution Temp (°F) Solution Temp (°C) Cooling Media Quench Temp Below (°F) Quench Temp Below (°C) Tensile Strength (ksi) Tensile Strength (MPa) Yield Strength (ksi) Yield Strength (MPa) Elongation (%) Reduction of Area (%) Brinell Hardness
F55 solution treat and quench 2010–2085 1100–1140 liquid 500 260 109–130 750–895 80 550 25 45

Heat Treatment

ASTM A182 F55 forgings are supplied in the solution-annealed condition followed by rapid quenching. Proper heat treatment is critical to achieve correct phase balance and optimum corrosion resistance.

Manufacturing Process

ASTM A182 F55 super duplex stainless steel forgings are manufactured by:

  • Hot forging or ring rolling

  • Solution annealing and water quenching

  • Precision machining of flanges and fittings

  • Final inspection and testing

The forging process ensures refined grain structure and superior mechanical integrity.

Super Duplex F55 Products

Dimensions of ASTM A182 F55 flanges and fittings are governed by applicable dimensional standards, including:

  • ASME B16.5 / ASME B16.47 for pipe flanges

  • ASME B16.11 for forged fittings

  • Project-specific drawings for custom components

Dimensional controls include outside diameter, thickness, bore size, facing finish (RF, RTJ), and machining tolerances.

Testing & Inspection

Each ASTM A182 F55 forging may be subjected to:

  • Chemical analysis

  • Mechanical testing

  • Impact testing (when specified)

  • Non-destructive testing (UT / PT / MT, if required)

  • Dimensional and visual inspection

Mill Test Certificates (EN 10204 3.1) are typically supplied.

Applications

  • Offshore Oil & Gas Platforms

  • Subsea and High-Pressure Piping Systems

  • Petrochemical and Chemical Processing

  • Desalination Plants

  • Marine and Shipbuilding

  • Corrosive and High-Temperature Service

ASTM A182 F55 (UNS S32760) flanges and fittings are widely used where maximum strength and corrosion resistance are required.

Download ASTM A182 F55 (UNS S32760) Specification PDF

Download the complete ASTM A182 F55 (UNS S32760) Specification for Flanges and Fittings PDF, including chemical composition limits, mechanical requirements, heat treatment conditions, and testing procedures.

👉 Download ASTM A182 F55 (UNS S32760) Specification PDF

👉 Download ASTM A182 Standard Specification PDF

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