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Based in Delhi, India, Punit Fasteners is a top producer and supplier of high-quality stainless steel 440B stud bolts. We provide high-performance fasteners appropriate for crucial industrial applications and are renowned for our precision engineering and dedication to quality. The remarkable hardness, moderate corrosion resistance, and wear resistance of our 440B Stud Bolts are well-known. These fasteners, which are made in accordance with international standards, are perfect for heavy machinery, the automotive, and aerospace industries. Punit Fasteners is your dependable partner for premium stainless steel fastening solutions in India and overseas thanks to its customer-focused philosophy, prompt deliveries, and affordable prices.
Stainless Steel 440B is a high-carbon martensitic stainless steel containing approximately 16–18% chromium and 0.75–0.95% carbon, with trace amounts of manganese, silicon, and molybdenum. When heat-treated, it provides exceptional hardness up to 58 HRC, high tensile strength (up to 760 MPa), and yield strength of about 450 MPa. It maintains high wear and abrasion resistance while offering superior toughness over 440C. It works well in dry or mildly corrosive environments, which makes it perfect for load-bearing and high-friction applications even though it is not very corrosion-resistant.
| 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 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Stainless steel 440B stud bolts are ideal for high-stress applications that require exceptional strength and durability. They are commonly used in the automotive and aerospace industries, marine refineries, and industrial equipment where wear and tear resistance is required. Their rigidity makes them suitable for valve assemblies, pumps and high pressure situations. In addition, 440B stud bolts are used in construction applications and equipment exposed to severe conditions, providing reliable performance and longevity under harsh conditions
Applications requiring high strength, resistance to wear, and dimensional stability under stress frequently use stainless steel 440B stud bolts. They are frequently used in tooling applications, aerospace for structural assemblies, and the automotive industry for engine and drivetrain components. These bolts can also be used in mechanical systems, high-performance industrial equipment, and pump and valve assemblies. In settings where fastener integrity is crucial under mechanical stress, 440B stud bolts are recommended because of their exceptional hardness and load-bearing capability. For optimum performance and longevity, they are best utilised in non-corrosive or mildly corrosive environments.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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