What is the Chemical Composition of 32760 Stainless Steel?

Typical composition in percent: Chromium 24.0-26.0; Nickel 6.0-8.0; Molybdenum 3.0-4.0; Tungsten 0.5-1.0; Copper 0.5-1.0; Nitrogen 0.20-0.30; Carbon 0.03 max; Manganese 1.2 max; Silicon 0.8 max; Phosphorus 0.035 max; Sulfur 0.02 max; Iron balance. The Mo, W and N levels support high resistance to pitting and stress corrosion cracking.

Super Duplex 32760 (1.4501/F55)

Q: What are the Mechanical Properties of Super Duplex 32760?

Typical values: tensile strength 750-930 MPa; yield strength (0.2 percent proof) >= 550 MPa; elongation >= 25 percent; hardness approx 290 HB (Brinell); modulus of elasticity 200 GPa. High strength with ductility supports thinner wall designs in pressure rated systems for offshore, marine and industrial applications.

Q: What are the Physical Properties of Super Duplex 32760?

Typical values: density 7.8 g/cm3; melting point 1350-1400 C; thermal conductivity approx 15 W/m K; thermal expansion approx 13.5 x 10^-6 per K; electrical resistivity approx 0.82 micro-ohm m. These properties support consistent performance under thermal cycling and pressure variation in oil and gas, desalination and marine systems.

Q: Are There Variants of Super Duplex 32760?

Related grades include Super Duplex 32750 (F53 / 1.4410), which is very similar and may be used as a cost effective alternative, and proprietary modified 32760 variants for improved weldability or machinability. Selection depends on corrosion severity, fabrication needs and budget.

Q: Where is Super Duplex 32760 Used?

Common applications: oil and gas (offshore platforms, risers, subsea pipelines); marine engineering (desalination intakes, splash zone structures); chemical and petrochemical processing (reactor vessels, tanks, valves, piping); water treatment and desalination (heat exchangers, evaporators, filter housings); power generation (condenser tubing, scrubber systems); pulp and paper (digesters and bleaching equipment). Its strength to weight ratio, corrosion reliability and weldability suit structural components and critical flow systems.

Exceptional corrosion resistance & high strength in one reliable, high-performance alloy, trusted for the world’s toughest industrial environments.

Super Duplex 32760

Super Duplex 32760 is a premium-grade stainless steel designed for extreme-service environments where both mechanical performance and corrosion resistance are paramount. Engineered for the world’s most corrosive and high-pressure environments, this super duplex grade combines austenitic toughness with ferritic strength, delivering unmatched durability and resistance to cracking under stress, heat, and chloride exposure.

With elevated levels of chromium, molybdenum, tungsten, nitrogen, and copper, it provides enhanced protection against pitting, crevice corrosion, and chloride stress corrosion cracking, even in high-salinity, high-pressure conditions. Super Duplex 32760 is widely used across offshore platforms, subsea systems, desalination units, and chemical processing plants, offering long service life and structural reliability in some of the world’s harshest environments.

AVAILABLE FORMS

Intamet offers 32760 in a wide range of forms, including:

Tubes & Pipes

Fitting & Flanges

Round Bars

Sheet & Plate

FAQs: Super Duplex 32760

What are the Mechanical Properties of Super Duplex 32760?

Super Duplex 32760 offers excellent mechanical strength while maintaining ductility and toughness. These properties allow for thinner wall designs in pressure-rated systems without compromising safety — ideal for offshore, marine, and high-pressure industrial applications.

Typical Mechanical Properties:

Tensile Strength: 750–930 MPa - Enables high load-bearing capacity in structural and pressurised systems, even under dynamic or impact conditions.

Yield Strength (0.2% proof): ≥550 MPa - Provides excellent resistance to permanent deformation under stress, supporting long-term structural integrity.

Elongation: ≥25% - Maintains good ductility for cold forming, welding, and fabrication without brittleness.

Hardness (Brinell): ~290 HB - Offers solid wear resistance while still allowing for machinability in custom-engineered parts.

Modulus of Elasticity: 200 GPa - Delivers structural stiffness and reliability under static and cyclic loading conditions.

These properties make 32760 a top choice for load-sensitive infrastructure where both mechanical strength and service life are critical.

What are the Physical Properties of Super Duplex 32760?

The physical characteristics of 32760 stainless steel support performance in environments with significant thermal cycling, pressure variation, or corrosive attack, common in oil & gas, desalination, and marine systems.

Typical Physical Properties:

Density: 7.8 g/cm³ - Standard for duplex stainless steels, offering strong performance in a moderate-weight profile.

Melting Point: 1350–1400 °C
Provides thermal stability in high-heat environments such as flue gas desulfurisation and heat exchanger systems.

Thermal Conductivity: ~15 W/m·K - Supports efficient heat transfer in heat exchangers and process systems.

Thermal Expansion Coefficient: ~13.5 × 10⁻⁶/K - Ensures dimensional stability across thermal cycles, minimising distortion and fatigue.

Electrical Resistivity: ~0.82 µΩ·m - Offers resistance to current flow — a valuable trait in electrochemical systems and equipment exposed to moisture.

These physical traits enable 32760 to perform consistently in pressure vessels, thermal recovery systems, and marine-facing structures.

Are There Variants of Super Duplex 32760?

Super Duplex 32760 is part of a broader family of duplex stainless steels, with several close alternatives tailored to specific operational demands.

Common Variants Include:

Super Duplex 32750 (F53 / 1.4410): Very similar composition with slightly lower molybdenum and tungsten content. Often used as a cost-effective substitute where ultra-high corrosion resistance is not required.

Modified 32760 Grades: Certain suppliers offer proprietary variants optimised for better weldability, improved machinability, or tighter control of microstructure.

These alternatives give engineers flexibility to match alloy performance with corrosion exposure, fabrication needs, and budget considerations.

What are the Chemical Composition of 32760 Stainless Steel?

The alloying balance in Super Duplex 32760 underpins its corrosion resistance and high mechanical strength. Elevated levels of molybdenum, tungsten, and nitrogen provide exceptional defence against chloride-induced pitting and stress corrosion cracking.

Typical Composition (%):

Chromium (Cr): 24.0–26.0
Builds a stable passive film for strong general corrosion resistance.

Nickel (Ni): 6.0–8.0
Enhances toughness and supports the duplex microstructure.

Molybdenum (Mo): 3.0–4.0
Improves resistance to pitting and crevice corrosion in seawater and brine.

Tungsten (W): 0.5–1.0
Boosts resistance to localised corrosion in highly acidic or halide-rich conditions.

Copper (Cu): 0.5–1.0
Increases resistance to sulfuric and other reducing acids.

Nitrogen (N): 0.2–0.3
Strengthens the austenitic phase and increases pitting resistance (raises PREN).

Carbon (C): ≤0.03
Minimises carbide formation and intergranular corrosion risk during welding.

Manganese (Mn): ≤1.2
Aids in deoxidation and helps maintain material toughness.

Silicon (Si): ≤0.8
Contributes to oxidation resistance during high-temperature exposure.

Phosphorus (P): ≤0.035, Sulphur (S): ≤0.02
Kept low to preserve ductility and weldability.

Iron (Fe): Balance
The primary element supporting the duplex microstructure.

This chemical profile supports a PREN (Pitting Resistance Equivalent Number) typically above 40, a key benchmark for seawater performance and harsh chemical environments.

Where is Super Duplex 32760 Used?

Due to its resistance to cracking, erosion, and corrosion, especially in chloride-heavy or acidic conditions. Super Duplex 32760 is trusted in industries where failure is not an option.

Common Applications Include:

Oil & Gas: Offshore platforms, risers, and subsea pipelines exposed to seawater and pressure cycling.

Marine Engineering: Components for shipbuilding, desalination intakes, and splash zone structures.

Chemical & Petrochemical Processing: Reactor vessels, storage tanks, valves, and piping exposed to aggressive media.

Water Treatment & Desalination: Heat exchangers, evaporators, and filter housings requiring long-term resistance to saltwater.

Power Generation: Condenser tubing and pressure containment in scrubbers and thermal recovery plants.

Pulp & Paper: Digesters and bleaching equipment exposed to chemical slurries and temperature variation.

Its strength-to-weight ratio, corrosion reliability, and weldability make it a go-to material for structural components, critical flow systems, and mission-critical industrial infrastructure.

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Super Duplex 32760 (1.4501/F55)