Andre Stainless, located in Pulau Ujong, Singapore, is a trusted stainless steel manufacturer and supplier with high-performance products catering to various industrial requirements. One of our specialty products is the Stainless Steel 440B Nut, designed to be strong, long-lasting, and resistant to wear and corrosion. Our dedication to quality, precision engineering, and customer satisfaction has made us a preferred choice in the stainless steel market. Regardless of marine, automotive, or heavy–industrial applications, our products are crafted according to strict global standards. With timely delivery, quality pricing, and high-end performance for each product shipped out, we at Andre Stainless are committed to excellence.
Stainless Steel 440B Nuts are constructed of a high-carbon martensitic stainless steel alloy containing 16–18% chromium and 0.75–0.95% carbon. They offer excellent hardness, strength, and wear properties and moderate corrosion resistance. By heat treatment, the nuts obtain high mechanical strength and dimensional stability, which is perfect for heavy-duty and high-pressure applications. The alloy balances toughness with stiffness, enabling the nuts to retain integrity and operate in extreme industrial and mechanical conditions. Their physical properties render them suitable for precision applications that need durability and load-bearing capacity.
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.
Andre 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 are commonly employed in the automotive, heavy machine, aerospace, and equipment industries where durability and wear resistance combined with high strength are necessary. Their strength and superior mechanical properties under pressure make them ideal for pump parts, valve components, heat exchangers, and structural fastenings in harsh environments. They also hold up in marine conditions and chemical processing applications due to their stability and moderate corrosion resistance. These nuts are often used in high-stress equipment, precision tools engineered, and parts subjected to thermal cycling and mechanical vibration, providing long-term reliability and lower maintenance in the long run.
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