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Njabulo Stainless, based in Cape Town, South Africa, is a trusted manufacturer and supplier of premium Stainless Steel 440B Stud Bolts. These high-strength studs are designed for secure and reliable fastening in demanding industrial and structural applications. Njabulo Stainless produces studs with precision threading, smooth surfaces, and uniform dimensions, ensuring strong and leak-proof connections. Stainless Steel 440B stud bolts are widely used in chemical, petrochemical, power generation, marine, and construction industries, where high tensile strength and corrosion resistance are critical. They provide long-lasting, safe, and efficient performance under extreme operating conditions.
Stainless Steel 440B Stud Bolts are made from martensitic stainless steel 440B, containing high carbon and chromium content. This alloy provides excellent hardness, tensile strength, and wear resistance, while maintaining good corrosion resistance in moderately aggressive environments. Mechanically, 440B studs exhibit high fatigue strength, toughness, and dimensional stability, making them ideal for high-pressure and high-stress applications. Precision manufacturing ensures smooth threads for tight and secure fastening. These properties make 440B stud bolts suitable for critical assemblies where mechanical strength and reliability are essential.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.74 g/cm3 | 0.280 lb/in³ |
| Melting point | 1482°C | 2700°F |
C | Si | Mn | P | S | N | Cr | Cu | Mo | Ni | Ti | V |
|---|---|---|---|---|---|---|---|---|---|---|---|
0,85 – 0,95 | – | – | – | – | – | 17,00 – 19,00 | – | 0,90 – 1,30 | – | – | 0,07 – 0,12 |
| Tempering Temperature (°C) | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness Rockwell (HR C) | Impact Charpy V (J) |
|---|---|---|---|---|---|
| Annealed* | 758 | 448 | 14 | 269HB max | – |
| 204 | 2030 | 1900 | 4 | 59 | 9 |
| 260 | 1960 | 1830 | 4 | 57 | 9 |
| 316 | 1860 | 1740 | 4 | 56 | 9 |
| 371 | 1790 | 1660 | 4 | 56 | 9 |
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Stainless Steel UNS S44003 stud bolts are durable and corrosion-resistant, offering high strength for demanding applications. Ideal for industrial and mechanical use, they provide reliability in challenging environments.
Stainless Steel 440B flush head stud bolts feature a smooth, flush design for a sleek finish and secure fit. Ideal for applications requiring a low-profile fastener with high strength and corrosion resistance.
Each Stainless Steel 440B Stud Bolt shipped from the company has been packed with utmost care using the most premium packaging material to avoid rust and any damage during movement. We always focus on complete customer satisfaction by making timely delivery through prompt transportation. All relevant documents pertaining to the product are delivered to the customers at the time of delivery.
Stainless Steel 440B Stud Bolts are widely used in chemical processing plants, petrochemical industries, power generation, marine engineering, and heavy machinery. They are ideal for fastening equipment, pressure vessels, pumps, and structural components that operate under high stress, vibration, or temperature. Their corrosion and wear resistance make them suitable for outdoor and industrial environments. In construction and manufacturing, 440B stud bolts ensure safe, durable, and leak-proof connections. They are also used in valves, flanges, and pipeline assemblies, providing reliable performance and long service life in demanding industrial and structural applications.
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