UNS S32550 Bolting Products
UNS S32550 is listed in the SUPER DUPLEX STAINLESS STEEL material family. The reference data below should be checked against the governing product specification, product form and delivery condition before selection or certification.
The reference chemistry table for UNS S32550 lists Carbon (C): 0.04% Max; Manganese (Mn): 1.50% Max; Phosphorus (P): 0.040% Max; Sulfur (S): 0.030% Max. Confirm exact limits and analysis tolerances against the governing standard and product form.
The mechanical-property table for UNS S32550 lists Tensile Strength: 760 Minimum MPa; Yield Strength: 550 Minimum MPa; Elongation: 15 Minimum %; Hardness: 302 Maximum BHN. These are reference entries; supplied condition, dimensions, test method and governing specification control the requirements, and the figures are not design allowables.
Werkstoff / EN cross-reference for UNS S32550: 1.4507. This comparison does not guarantee interchangeability; confirm chemistry, product form and condition against the governing specification.
View Technical Information →Standard identification and material designation information for UNS S32550.
The reference chemistry table lists Carbon (C): 0.04% Max; Manganese (Mn): 1.50% Max; Phosphorus (P): 0.040% Max; Sulfur (S): 0.030% Max. Confirm the governing standard, product analysis tolerances and product form before ordering.
| Element | Symbol | Composition |
|---|---|---|
| Carbon | C | 0.04% Max |
| Manganese | Mn | 1.50% Max |
| Phosphorus | P | 0.040% Max |
| Sulfur | S | 0.030% Max |
| Silicon | Si | 1.00% Max |
| Chromium | Cr | 24.00 – 27.00% |
| Nickel | Ni | 4.50 – 6.50% |
| Molybdenum | Mo | 2.90 – 3.90% |
| Nitrogen | N | 0.10 – 0.25% |
| Copper | Cu | 1.50 – 2.50% |
| Iron | Fe | Balance |
The table reports Tensile Strength: 760 Minimum MPa; Yield Strength: 550 Minimum MPa; Elongation: 15 Minimum %; Hardness: 302 Maximum BHN as reference data for UNS S32550. Actual requirements depend on condition, dimensions, test method and specification; these values are not design allowables.
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 760 Minimum | MPa |
| Yield Strength | 550 Minimum | MPa |
| Elongation | 15 Minimum | % |
| Hardness | 302 Maximum | BHN |
UNS S32550 provides a combination of high mechanical strength, excellent corrosion resistance and good resistance to demanding chloride and acidic environments.
Provides excellent resistance to general corrosion and localized corrosion in demanding industrial environments.
Offers significantly higher strength than conventional austenitic stainless steels.
The duplex microstructure provides excellent resistance to chloride-induced stress corrosion cracking.
Copper additions improve performance in certain acidic environments including demanding chemical processing service.
UNS S32550 is selected for applications requiring high strength and excellent corrosion resistance in severe industrial environments.
Offshore equipment, valves, pumps and components operating in demanding corrosive environments.
Marine systems and offshore components exposed to chloride-rich seawater environments.
Process equipment and components exposed to corrosive chemicals and acidic environments.
Pumps, piping and equipment handling seawater and high-chloride process streams.
Consider chloride concentration, acid exposure and operating conditions when selecting UNS S32550.
Appropriate fabrication procedures should be used to maintain the duplex microstructure and corrosion resistance of the material.
UNS S32550 is suitable where high strength and excellent resistance to demanding corrosive environments are required.
The commonly listed Werkstoff / EN cross-reference for UNS S32550 is 1.4507. Treat this as a grade comparison, not a guarantee of interchangeability. Verify chemistry, product form, condition and governing specification against the supplier certificate before substitution.
Yes. UNS S32550 offers excellent resistance to general corrosion, pitting, crevice corrosion and chloride stress corrosion cracking.
It is commonly used in oil and gas, marine, offshore, chemical processing and seawater desalination applications.
Our engineering team can help you select suitable materials based on operating temperature, pressure and service conditions.