Harsh Metalloys, based in Mumbai, India, stands out as a top manufacturer and supplier of high-quality Stainless Steel 440B Fasteners, specifically crafted for demanding mechanical applications. Renowned for their impressive strength, wear resistance, and heat-treatable hardness, these 440B fasteners are perfect for precision work in high-stress settings. Made from martensitic stainless steel, they come in various forms like bolts, nuts, screws, washers, and stud bolts, all adhering to international standards such as ASTM and ASME. Whether in automotive, tooling, aerospace, or industrial machinery, our SS 440B fasteners guarantee secure and long-lasting connections, even in the toughest conditions.
Stainless Steel 440B Fasteners are crafted from a high-carbon martensitic alloy that includes around 16–18% Chromium and 0.75–0.95% Carbon, along with Manganese, Silicon, and trace elements. This unique blend allows for heat treatment, achieving a Rockwell hardness of 55 HRC or higher. They boast excellent tensile strength, typically exceeding 720 MPa, along with good toughness and moderate corrosion resistance. These fasteners excel in wear resistance and maintain their shape under mechanical stress, making them ideal for high-load, high-friction applications in industrial, mechanical, and structural assemblies.
| 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 Harsh Metalloys, India, Mumbai, 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 widely used in applications that demand exceptional hardness, strength, and resistance to wear. Common industries include aerospace, automotive, tooling, and heavy machinery, where reliable fastening is critical. These fasteners are ideal for use in engines, transmission systems, die and mold fabrication, surgical instruments, pumps, and valves. Their performance in dry or mildly corrosive environments makes them suitable for high-temperature, high-pressure conditions. Due to their heat-treatability and precision, SS 440B fasteners are often chosen for equipment requiring exact alignment and strong mechanical locking over extended service periods.
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