Mbemba Stainless is a reputable manufacturer and supplier of **Stainless Steel 440B Nuts** based in Kinshasa, Congo. They’re well-known for delivering top-notch fastening solutions that are engineered for strength, precision, and durability. These nuts are made from high-quality 440B stainless steel, which provides outstanding resistance to wear, corrosion, and high temperatures. With a strong commitment to quality and performance, Mbemba Stainless guarantees that each product meets international standards and industrial needs. They cater to a variety of sectors, including petrochemical, marine, automotive, and construction, offering reliable fastening components that are designed to perform efficiently in demanding and high-stress environments throughout Congo and beyond.
**Stainless Steel 440B Nuts** primarily consist of chromium (16–18%), carbon (0.75–0.95%), along with trace amounts of molybdenum, manganese, and silicon. This alloy strikes a fantastic balance between hardness, corrosion resistance, and mechanical strength. The nuts boast a tensile strength of about 700–900 MPa and a yield strength of around 450 MPa. They also exhibit good wear and fatigue resistance, maintaining their shape even under thermal stress. When heat-treated, 440B nuts achieve exceptional hardness, making them perfect for tough environments that demand both durability and precise fastening performance.
C | Si | Mn | P | S | N | Cr | Cu | Mo | Ni | Ti | V |
|---|---|---|---|---|---|---|---|---|---|---|---|
0.75 – 0.95 | – | – | – | – | – | 16.00 – 18.00 | – | 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 |
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.74 g/cm3 | 0.280 lb/in³ |
| Melting point | 1482°C | 2700°F |
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A corrosion-resistant product, Stainless Steel 440B nuts are available in sizes from M6 to M64. Known for their high strength and hardness, they are ideal for heavy-duty applications in industrial machinery and automotive components.
A corrosion-resistant product, Stainless Steel 440B coupling nuts, used to join two male threads, come in sizes from M6 to M36. They provide exceptional strength and durability, making them suitable for high-stress and heavy-duty applications.
A corrosion-resistant product, Stainless Steel 440B nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert prevents loosening under vibration, offering secure fastening in high-strength and demanding environments.
A corrosion-resistant product, Stainless Steel 440B flange hex nuts feature an integrated flange and come in sizes from M5 to M20. They provide enhanced load distribution and stability, suitable for high-stress and high-temperature applications.
A corrosion-resistant product, Stainless Steel 440B heavy hex nuts are available in sizes from M10 to M48. Their increased thickness and strength make them ideal for heavy-duty applications and high-stress environments requiring robust and secure fastening.
A corrosion-resistant product, Stainless Steel 440B square nuts offer a larger contact surface and come in sizes from M6 to M30. They are ideal for high-strength applications requiring reliable performance in heavy clamping and industrial settings.
Mbemba Stainless ensures high-quality materials with a string of tests for excellence. Stainless Steel 440B Nut goes through proper checks such as hardness testing, spectrochemical analysis, PMI testing, tensile testing, micro and macro structural tests, pitting resistance, and IGC testing. We assure high performance through these strict checks. Supporting our commitment to quality, we provide documentation, such as commercial invoices, packing lists, labels, Certificates of Origin, and Third-Party Inspection Certificates, for customer satisfaction on pricing, delivery, and reliability of the products.
**Stainless Steel 440B Nuts** find extensive use in **chemical processing, oil and gas, marine, aerospace, and automotive industries**, where high strength and corrosion resistance are essential. They’re perfect for assembling machinery, valves, pumps, turbines, and other mechanical systems that face vibration, pressure, or heat. These nuts excel in moderately corrosive environments and applications that involve wear and abrasion. Thanks to their hardness and strength, they are frequently used in heavy-duty equipment, precision instruments, and structural assemblies that require dependable, long-lasting fastening solutions in challenging operational conditions.
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