Harsh Metalloys, located in Mumbai, India, stands out as a top manufacturer and supplier of Stainless Steel 446 Fasteners, specifically crafted for tough applications that demand exceptional heat and corrosion resistance. These fasteners, made from ferritic stainless steel Grade 446, thrive in high-temperature settings where oxidation and sulfidation pose significant challenges. We provide a diverse selection of 446 fasteners, including bolts, nuts, washers, and studs, available in various sizes and specifications. Our SS 446 fasteners meet ASTM and ASME standards and are commonly utilized in industries like petrochemical, furnace manufacturing, heat treatment, power plants, and other thermal process systems.
Stainless Steel 446 Fasteners are composed of 23–27% Chromium, low Carbon, and minimal Nickel, which grants them remarkable resistance to oxidation, scaling, and sulfur corrosion. As a ferritic stainless steel, 446 offers thermal stability and retains strength even at elevated temperatures. These fasteners typically boast a tensile strength of around 485 MPa and a yield strength of about 275 MPa. While they may be less ductile than austenitic steels, their outstanding resistance to thermal fatigue, warping, and corrosion makes them perfect for securing components in high-heat environments. Their unique composition ensures durability, dimensional stability, and longevity, even when continuously exposed to heat and reactive gases.
| Standard | ASTM A193,A194 / ASME SA193,SA194 |
| Standard | DIN, ASTM, BS and all International Standards |
| Length | 3 mm to 200 mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
| SS 446 | 2.0 max | 1.5 max | 0.75 max | 0.040 max | 0.030 max | 23.00 – 30.00 | – | 0.50 max | 0.10 – 0.25 |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.5 g/cm3 | 1510 °C (2750 °F) | Psi – 75,000 , MPa – 485 | Psi – 40,000 , MPa – 275 | 20 % |
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Stainless Steel 446 Nuts offer excellent corrosion resistance, particularly in high-temperature environments. Available in sizes ranging from M3 to M48, they provide robust mechanical strength and are ideal for high-temperature applications.
Stainless Steel 446 Stud Bolts are highly resistant to oxidation and corrosion. Typically available in lengths from 25mm to 1000mm and diameters from M6 to M30, they are used for high-temperature and corrosive environments.
Stainless Steel 446 Bolts provide superior corrosion resistance and high-temperature stability. Sizes range from M5 to M36, with various lengths available. They are suitable for use in severe environments where oxidation is a concern.
Stainless Steel 446 threaded rods exhibit excellent resistance to corrosion and high temperatures. Commonly available in lengths up to 3000mm and diameters from M6 to M36, they are used in demanding industrial applications.
Stainless Steel 446 screws are known for their resistance to high temperatures and corrosion. Available in sizes ranging from M2 to M12, they are used in applications requiring high strength and durability under harsh conditions.
Stainless Steel 446 washers offer outstanding corrosion resistance and durability. They come in various sizes, typically from M3 to M50, and are used to distribute loads and prevent surface damage in high-temperature applications.
Our Stainless Steel 446 Fasteners are subjected to extensive testing, such as 100% radiographic examination, strength testing, macro/micro examination, raw material acceptance checking, third-party verification, combined-mode intergranular corrosion testing, chemical analysis, and PMI examination. These all-encompassing tests guarantee excellent robustness, performance and compliance with the same‐industry standards, making sure that our fasteners comply to the strict needs of high‐temperature and corrosion‐resistant applications.
Stainless Steel 446 Fasteners are widely utilized in environments that experience high temperatures and corrosive conditions, where regular fasteners would simply fall apart. You’ll often find them in applications like heat treatment equipment, industrial furnaces, boilers, combustion chambers, and exhaust systems. They’re also perfect for power plants, petrochemical facilities, and metallurgical industries, where hot gases and sulfur compounds are a regular occurrence. These fasteners provide secure and stable connections even in extreme conditions, ensuring they maintain their mechanical integrity under thermal stress. Their impressive resistance to oxidation, sulfidation, and scaling makes them essential in fastening systems where safety, durability, and performance are top priorities.
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