Weston Stainless, headquartered in Midland, UK, is a topmost stainless steel fastener manufacturer and supplier of high-grade stainless steel fasteners to meet various industrial requirements. Of their high-end products, Stainless Steel 440B Bolts stand out due to their high hardness, corrosion resistance, and wear resistance. They are crafted from Grade 440B stainless steel and are martensitic in nature, possessing superior mechanical strength. They come in a range of shapes like hex bolts, stud bolts, U-bolts, and anchor bolts, which are suitable for high-strength applications. Their enhanced material properties make them durable and reliable in aggressive environments like the automotive, aerospace, and tooling sectors.
Stainless Steel 440B Bolts are made up of carbon (0.75-0.95%), chromium (16-18%), manganese (1% max), silicon (1% max), and molybdenum (0.75% max), which increase their strength and resistance to corrosion. Mechanically, they offer a tensile strength of 735-1000 MPa, yield strength of 450 MPa, and up to 58 HRC hardness when heat-treated. Their physical properties consist of a density of 7.7 g/cm³, thermal conductivity of 24.2 W/m·K, and coefficient of thermal expansion of 10.1 µm/m·°C, which guarantees stability under high-stress conditions.
|
Material |
Specification |
Standards |
Size |
Length |
|
Stainless Steel 440b Bolts |
ASTM, ASME and API |
ASTM B 193 / ASME SB 193 |
M02 to M30 |
3 mm To 200 mm |
| Element | SS 440b |
| Tensile Strength (MPa) min | 480 |
| Yield Strength 0.2% Proof (MPa) min | 275 |
| Elongation (% in 50mm) min | 16 |
| Rockwell B (HR B) max Hardness | 95 |
| Brinell (HB) max Hardness | 201 |
| Element | SS 440b |
| Ni | 0.75 |
| C | 0.15 |
| Mn | 1.00 max |
| P | 0.04 max |
| S | 0.03 max |
| Si | 1.00 max |
| Cr | 11.5 – 13.5 |
| Mo | – |
| N | – |
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Stainless Steel 440B Bolts find extensive applications in aerospace, automotive, defense, and manufacturing sectors where high strength and wear resistance are important. They are especially ideal for cutting tools, high-pressure equipment, bearings, and surgical equipment because of their high hardness. Their high corrosion resistance makes them ideal for marine, chemical processing, and food industries, with long-lasting performance in moist environments, chemicals, and high mechanical loads, for secure fastening in harsh applications.
Stainless Steel 440B Bolts are provided with mill test certificates (MTC) as per EN 10204 3.1/3.2, guaranteeing compliance in terms of quality. They are packed in wood boxes safely, bubble wrap, and plastic coverings to avoid damage during transit. With rapid worldwide shipping and prompt delivery, the bolts are delivered efficiently in order to fulfill industrial needs, guaranteeing durability and high–performance features in critical applications.
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