Super Duplex F53 Bars (UNS S32750)

Maass Special Alloys supplies Super Duplex F53 bars as rolled and forged bar upon request. Also known as Super Duplex 2507, UNS S32750, EN 1.4410 or X2CrNiMoN25-7-4, this grade is used where high strength and resistance to chloride-induced corrosion are required. The supply range runs from small diameters up to 600 mm.

High-quality Super Duplex F53 bars

Reliable bar supply for demanding super duplex requirements

High strength

High yield strength for pressure parts.

Pitting resistance

PREN above 40 in chloride media.

2507 grade

Super duplex for severe service.

Rolled & forged

Available as rolled or forged bar.

Certified supply

EN 10204 3.1 or 3.2.

Super Duplex F53 bar specifications and certification

Responsive Specification Table
Property Value
Material Super Duplex F53 / Super Duplex 2507
UNS S32750
EN / WNR 1.4410
Product forms Rolled bar and forged bar
Delivery time Approx. 1 - 2 weeks

Super Duplex F53 bars are supplied on request according to the required project specification. The available size range extends up to 600 mm diameter. In practice, larger sections are usually supplied as forged bar, while rolled bar is more commonly considered for smaller and mid-range diameters.

Certified supply & additional information

  • EN 10204 / 3.1 certified
  • ASTM / ASME specifications available where applicable
  • Material supplied in compliance with applicable international specifications
  • Random lengths or cut-to-length supply
  • Heat number traceability

Upon request

  • Additional testing
  • EN 10204 / 3.2 certification
  • Third-party inspection

Chemical composition

Super Duplex F53 / UNS S32750 is a chromium-nickel-molybdenum-nitrogen alloy with a balanced duplex microstructure. Its chemistry is aimed at high strength, strong pitting resistance and reliable performance in chloride-containing environments.

Below chemical composition limits are provided for quick reference. Final compliance is confirmed by the Mill Test Certificate and the applicable order specification.

Responsive Chemical Composition Table
Element Limit (%)
Chromium (Cr) 24.0 – 26.0
Nickel (Ni) 6.0 – 8.0
Molybdenum (Mo) 3.0 – 5.0
Nitrogen (N) 0.24 – 0.32
Copper (Cu) 0.50 max.
Manganese (Mn) 1.20 max.
Silicon (Si) 0.80 max.
Carbon (C) 0.030 max.
Phosphorus (P) 0.035 max.
Sulfur (S) 0.020 max.
Iron (Fe) Balance

Typical physical and mechanical properties of Super Duplex F53

The values below give a general indication of typical Super Duplex F53 bar properties. Actual values depend on product form, diameter, heat treatment, supply condition and the final order specification.
Responsive Mechanical Properties Table
Property Unit Typical value
Density g/cm³ 7.8
Density lb/in³ 0.28
Modulus of elasticity GPa 200
Thermal conductivity at 20°C W/m·°C 14–15
Specific heat capacity at 20°C J/kg·°C approx. 490
Tensile strength MPa 750–930
Yield strength MPa 550 min.
Elongation % 25 min.
Hardness HB 310 max.
PREN - ≥40 / typically ≥41
Typical service range °C -46 to approx. 300

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sales@maass-special-alloys.com

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+31 (0)30 8200 370