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Poang Fasteners is a well-respected manufacturer and supplier of Stainless Steel 446 Washers based in Da Nang, Vietnam. We provide top-notch fastening solutions specifically designed for high-temperature and corrosive environments. Stainless Steel 446 is a ferritic stainless steel known for its high chromium content, which gives it exceptional resistance to oxidation, sulfidation, and scaling at elevated temperatures. Our SS 446 Washers are crafted to evenly distribute loads, minimize surface wear, and boost joint reliability in tough applications. Built to meet ASTM, DIN, and ISO standards, these washers are widely utilized in industries like petrochemical, furnace, cement, glass, and power generation, where durability and thermal stability are crucial.
Stainless Steel 446 Washers consist of 23–27% chromium, very low carbon content (<0.20%), and carefully controlled amounts of manganese, silicon, phosphorus, and sulfur. This ferritic alloy offers excellent oxidation resistance up to around 1100°C (2010°F), making it perfect for extended exposure to high heat. SS 446 Washers boast a tensile strength of about 485 MPa and a yield strength of around 275 MPa, along with good creep resistance and thermal fatigue strength. Although they can’t be hardened through heat treatment, they retain their dimensional stability, toughness, and wear resistance, making them dependable in fastening systems that face extreme heat and corrosive industrial conditions.
| Grade | C | Mn | Si | P | S | Cr | MO | Ni | N | |
| 446 | min. | – | – | – | – | – | 23.0 | – | – | 0.10 |
| max. | 0.20 | 1.5 | 0.75 | 0.040 | 0.030 | 30.0 | 0.50 | 0.25 | ||
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 446 | 485 | 275 | 20 | 92 | 201 |
SS 446 Washer Specifications | ||
| Specifications | : | ASTM A193 ASME SA193 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | M02 to M33 |
| Size | : | 3 mm to 200 mm |
| Type | : | Flat Washer, Lock Washer, Sealing Washer, Split Washer, Slot Washer, Machine Washer, Star Washer SPRINGS – Wire Spring & Flat Spring |
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 446 washers are used at high temperatures because of their excellent oxidation resistance and durability. It is ideal for environments up to 1500°F (815°C) and is used in the automotive, aerospace and petrochemical industries. These washers are important for maintaining the integrity of bolted joints, preventing leaks, and ensuring long-term performance under extreme conditions. The high temperature and corrosion resistance make them suitable for use in exhaust systems, industrial incinerators and high-temperature process equipment.
Poang Stainless Steel 446 Washers are widely used in power plants, particularly for boilers, turbines, and heat exchangers. In the petrochemical and refinery sectors, you’ll find them in furnaces, reactors, and thermal processing equipment that operate under intense heat. The cement and glass industries rely on them for kilns, burners, and furnace assemblies due to their impressive scaling resistance. In heat-treatment and metallurgical equipment, they help maintain joint stability during severe thermal cycling. Marine applications also take advantage of their corrosion resistance in salty environments.
Poang Fasteners is a leading manufacturer and supplier of high-quality fasteners in Da Nang, Vietnam, with over 8 years of experience serving global industries.
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