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At Themban Nickel Alloys, we take pride in being a leading manufacturer and distributor of duplex steel bolts in Cape Town , South Africa. Our duplex steel bolts are crafted from high-quality, corrosion-resistant materials designed to withstand extreme conditions and heavy loads. Perfect for industries such as oil and gas, construction, and marine, these bolts offer exceptional strength, durability, and performance. With a commitment to excellence and a customer-centric approach, Themban Nickel Alloys delivers reliable, top-tier products that meet the highest industry standards. Trust us for your duplex steel bolt needs and experience unparalleled quality and service.
| Specifications | ASTM A479 & ASME SA479 |
| Standard | DIN, ASTM, BS and all International Standards |
| Length | 3 to 200 MM |
| Duplex Steel Nut and Bolts Size | M3 To M56 3/6″ to 2″ |
| Duplex Steel 2205 Machine Screws Size | M1.6 To M12 |
| Duplex Steel 2205 Washers Size | M3 To M56 3/6″ to 2″ |
| Duplex Steel Bolts | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
As a premier Duplex Steel Bolts Manufacturer in the Cape Town, we produce bolts with a carefully balanced chemical composition, typically featuring 22–23% Chromium, 4.5–6.5% Nickel, 3–3.5% Molybdenum, and minimal carbon content. These bolts boast impressive mechanical properties, including high tensile strength (620–880 MPa), yield strength (~450 MPa), and outstanding hardness and elongation. The unique microstructure of duplex stainless steel, which combines austenitic and ferritic phases, provides enhanced corrosion resistance, stress corrosion cracking resistance, and toughness, making them perfect for critical and high-pressure applications across various industrial sectors.
Contact us to get a quick quote for your requirement.
The Duplex Steel Bolts we manufacture at Themba Nickel Alloys are widely utilized in numerous industries throughout the Cape Town, such as oil and gas, marine, petrochemical, offshore drilling, and desalination plants. Their remarkable strength and resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking make them ideal for demanding environments. These bolts are commonly found in flanged joints, pressure vessels, structural assemblies, and subsea equipment, where safety and performance are paramount. In construction and infrastructure projects, they ensure long-lasting durability in coastal or chemically aggressive environments, making Themba Nickel Alloys the go-to partner for high-performance fastening solutions.
