Duplex Steel S31803 Stud Bolts

About Duplex Steel S31803 Stud Bolts

Duplex steel S31803 stud bolts are high-strength fasteners used in heavy-duty industrial applications. This material is called 'duplex' because it has a dual-phase microstructure. It consists of roughly equal parts of ferrite and austenite. This specific balance gives the bolts better corrosion resistance than standard stainless steel, like 304 or 316. These stud bolts are commonly used in environments where chloride stress corrosion cracking is a risk.

Superior Corrosion and Pitting Resistance

Duplex Steel S31803 Stud Bolts deliver excellent resistance to both general and localized corrosion, making them ideal for applications in aggressive environments. Their PREN value exceeds 34, ensuring outstanding performance in environments where pitting corrosion is a concern. This makes them especially suited for saltwater, chemical, and offshore settings where reliability is paramount.


Robust Mechanical Properties

Boasting a minimum yield strength of 450 MPa and tensile strengths of at least 620 MPa, Duplex Steel S31803 Stud Bolts provide durability and stability in critical structural connections. Their moderate machinability allows easier manufacturing compared to standard austenitic stainless steel, furthering their versatility in precise, high-strength applications.


Wide Range of Applications and Compliance

S31803 stud bolts are used extensively across petrochemical, oil & gas, marine, power plant, and structural projects. Available as ex-stock or on-demand with full compliance to ASTM and ASME standards, these bolts can be supplied with ISO certifications, tailored dimensions, and packaging suited to each client's requirements.