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Themba Nickel Alloys, a prominent manufacturer and supplier located in Cape Town, Cape Town, specializes in high-quality Duplex Steel Screws. These screws are crafted for outstanding strength, corrosion resistance, and durability, making them perfect for tough industrial settings. With precision manufacturing that meets international standards, they excel in applications where mechanical reliability and resistance to harsh chemicals are essential. The unique blend of ferritic and austenitic stainless steels in Themba Nickel Alloys’ Duplex Steel Screws ensures exceptional toughness, high tensile strength, and remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking, making them ideal for the chemical, petrochemical, marine, and offshore sectors.
Duplex Steel Screws are crafted from a well-balanced mix of iron, chromium, nickel, and molybdenum. This specific composition delivers impressive tensile strength, usually ranging from 700–850 MPa, a yield strength of 450–550 MPa, and an elongation of 20–25%. Thanks to their duplex microstructure, these screws offer excellent resistance to pitting and crevice corrosion, especially in chloride-rich environments, along with outstanding fatigue and stress corrosion cracking resistance. They maintain their mechanical integrity even under high temperatures and pressures, while also being easy to machine and weld, making them perfect for heavy-duty and corrosive applications.
| Standard | : | ASTM A193, A194 / SA193 / SA194 |
| Dimension | : | ASTM, DIN, BS, GB, IS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Bolts Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Screw Size | : | M02 to M33 | Custom Sizes |
| Heat Treatment | : | Annealing, Stress Relieving, Case Hardening, Quenching and Tempering. |
| Type | : | Hex Bolt/ Hex Screw, Square Head Bolt, U Bolt, Carriage Bolt, Eye Bolt, T Bolt/ J Bolt/ L bolt, Flange Bolt, Coach Screw etc. |
At Themban Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Screws in Cape Town , South Africa, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Cape Town, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Duplex Steel Screws find extensive use in the chemical processing, oil and gas, marine, and offshore industries. They are particularly effective for securing structural components, pressure vessels, piping systems, heat exchangers, and machinery that operate in chloride-rich or highly corrosive conditions. Their impressive combination of high strength and corrosion resistance makes them suitable for high-pressure and high-temperature applications. In offshore and subsea installations, these screws ensure long-lasting durability against seawater corrosion.
