Mbemba Stainless is your go-to manufacturer and supplier of top-notch Stainless Steel 440B Fasteners right in Kinshasa, Congo. They specialize in delivering high-performance fastening solutions that are perfect for demanding and high-strength applications. SS 440B is a high-carbon martensitic stainless steel grade, celebrated for its remarkable hardness, wear resistance, and corrosion protection. At Mbemba Stainless, you’ll find a diverse selection of 440B fasteners, including bolts, nuts, screws, washers, studs, and even custom-machined components. Each fastener is crafted with precision and adheres to strict quality standards, ensuring they provide excellent mechanical strength and durability—ideal for industries that need reliable, long-lasting, and high-temperature fastening performance.
When it comes to composition, Stainless Steel 440B contains 16–18% Chromium, 0.75–1.00% Carbon, along with carefully controlled amounts of Manganese, Silicon, Nickel, and Molybdenum. This blend gives it impressive hardness and wear resistance after heat treatment. As a martensitic grade, SS 440B boasts outstanding tensile and yield strength, along with excellent edge retention. These fasteners also offer moderate corrosion resistance, great toughness, and superior resistance to abrasion and impact. Their mechanical stability at high temperatures and ability to achieve high hardness levels make them perfect for heavy-duty and precision fastening applications.
| 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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Highly resistant to corrosion, Stainless Steel 440B Nuts are designed for high-strength applications. Available in sizes ranging from M3 to M24, they are precision-manufactured to ensure reliable performance and durability.
Stainless Steel 440B Stud Bolts offer excellent corrosion resistance and are ideal for demanding environments. Typically available in lengths from 50mm to 500mm and diameters from M6 to M30, they provide robust fastening solutions for various industrial applications.
Stainless Steel 440B Bolts exhibit superior corrosion resistance and are suitable for harsh conditions. They come in sizes from M6 to M30 and lengths ranging from 10mm to 300mm. Their high strength and durability make them ideal for critical applications.
With excellent corrosion resistance, Stainless Steel 440B threaded rods are used in heavy-duty applications. They are available in lengths from 100mm to 2000mm and diameters ranging from M6 to M30, offering versatility and strength in fastening solutions.
Stainless Steel 440B screws provide high corrosion resistance and are used in various applications. Sizes range from M3 to M20, with 10mm to 150mm lengths. They are known for their strength and reliability in tough environments.
Stainless Steel 440B washers offer exceptional corrosion resistance, crucial for distributing loads and reducing friction. They are available in sizes from M3 to M30, with standard thicknesses that ensure durability and performance in high-stress applications.
Here at Mbemba Stainless, Kinshasa, Congo, our primary concern is a faultless customer experience by providing comprehensive documentation for our premium Stainless Steel 440B Fasteners. This includes all the necessary documents like commercial invoice, packaging list, heat treatment chart, quality assurance plan and the NABL-approved lab test report. Additional offerings include MTC, PMI Test Certificate, radiography test reports, and Third-Party Inspection Certificates, assuring you of quality and customer satisfaction.
Stainless Steel 440B Fasteners are a go-to choice in industries that demand high strength, hardness, and wear resistance for secure and durable fastening. You’ll often find them in automotive parts, industrial machinery, tools, cutting equipment, aerospace components, and mechanical assemblies. They also play a crucial role in defense equipment, steel structures, heavy engineering, and environments that experience high temperatures. SS 440B fasteners excel in situations involving friction, stress, vibration, and load-bearing conditions. Their impressive durability and wear resistance make them perfect for precision instruments, knife manufacturing tools, and high-performance mechanical assemblies that need reliable fastening.
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