Lecong Stainless, based in Da Nang, Vietnam, stands out as a top manufacturer and supplier of premium stainless steel fasteners designed for tough industrial settings. One of their standout products, Stainless Steel 347 Nuts, is crafted to excel in high-temperature and corrosive environments. Made from top-notch materials and utilizing cutting-edge manufacturing techniques, these nuts promise durability and reliability. Lecong Stainless caters to vital sectors like aerospace, petrochemical, power generation, and marine industries. With a reputation for consistent quality, competitive pricing, and compliance with international standards, Lecong is a go-to partner for robust and high-performance fastening solutions.
Stainless Steel 347 Nuts are crafted from a columbium (niobium)-stabilized austenitic stainless steel alloy. Their typical makeup features 17–20% Chromium, 9–13% Nickel, along with minor amounts of Niobium (Columbium) and Tantalum to enhance resistance against intergranular corrosion. These nuts boast impressive mechanical strength even at high temperatures, with a tensile strength of about 515 MPa, yield strength of 205 MPa, and an elongation of roughly 35%. Stainless Steel 347 Nuts provide excellent oxidation resistance, good creep strength, and outstanding weldability, making them perfect for fastening in heat-intensive and chemically aggressive industrial settings.
Grade | Mn | N | P | C | S | Cr | Mo | Si | Ni | Other | |
347 | min. max | 2.00 | – | 0.045 | – 0.08 | 0.030 | 17.0 19.0 | – | 0.75 | 9.0 13.0 | Nb=10(C+N) 1.0 |
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 | ||||
347 | 515 | 205 | 40 | 92 | 201 |
|
Material |
Specification |
Standards |
Size
|
Length |
|
Stainless Steel 347 Nut |
IS BS ASTM |
ASTM A193 B8C |
3 mm to 200 mm |
M02 to M33 |
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A corrosion-resistant product, Stainless Steel 347 nuts are available in sizes from M6 to M64. They offer exceptional heat and oxidation resistance, ideal for high-temperature applications in aerospace and chemical processing industries.
A corrosion-resistant product, Stainless Steel 347 coupling nuts come in sizes from M6 to M36. They are designed to connect two male threads securely, providing high strength and stability in high-temperature and harsh industrial environments.
A corrosion-resistant product, Stainless Steel 347 nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert helps prevent loosening under vibration, offering reliable performance in high-temperature applications.
A corrosion-resistant product, Stainless Steel 347 flange hex nuts feature an integrated flange and are available in sizes from M5 to M20. They provide enhanced load distribution and stability in high-temperature and corrosive environments.
A corrosion-resistant product, Stainless Steel 347 heavy hex nuts are available in sizes from M10 to M48. Their increased thickness and strength make them suitable for heavy-duty and high-temperature applications requiring robust and secure fastening.
A corrosion-resistant product, Stainless Steel 347 square nuts offer a larger contact surface and come in sizes from M6 to M30. They are ideal for high-temperature and heavy clamping applications, providing stability and durability.
We provide our customer with a high-quality stainless Steel 347 Nut with full transparency. All the products carry necessary documentations, which are commercial invoice packing list fumigation certificate; heat treatment chart of a test report from NABL-approved laboratory’s We also give EN10204 /3.1-b material test, PMI, and a report on radiography of 100%, along with our Third Party inspection report, to enable full documentation by which client can achieve complete satisfaction.
Stainless Steel 347 Nuts find extensive use in high-temperature, high-stress environments where corrosion and oxidation resistance are paramount. In the aerospace and aviation sectors, they are essential for engine components and exhaust systems. In petrochemical and chemical facilities, these nuts secure equipment that endures high heat and corrosive fluids. They are particularly suited for applications in heat exchangers, furnace components, pressure vessels, and boiler equipment.















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