Weston Stainless, Midland, UK, is a reliable source of high-quality stainless steel products, including Stainless Steel 347H Nuts. These nuts are produced from grade 347H stainless steel, a niobium-stabilized high-carbon austenitic alloy that provides improved creep resistance and high-temperature strength. They come in different shapes like hex nuts, lock nuts, flange nuts, and wing nuts and meet international standards such as ASTM A194 and A193. The higher carbon content of SS 347H makes it suitable for uses that demand greater corrosion resistance, thermal stability, and strength in harsh environments like petrochemical and aerospace sectors.
Stainless Steel 347H Nuts have 17-20% chromium, 9-13% nickel, 0.04-0.10% carbon, and niobium stabilization, which gives resistance to intergranular corrosion and oxidation at high temperatures. These nuts have a tensile strength of 515 MPa, yield strength of 205 MPa, and elongation of 40%. They have a density of 7.93 g/cm³ and a melting point between 1398-1446°C, where they retain great structural stability even at extreme temperatures. They also have a coefficient of thermal expansion of 16.6 µm/m-°C, which provides stability in conditions of varying temperatures.
| Specifications | : | ASTM A 193 ASME SA 193 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347H | min. | 0.04 | – | – | – | – | 17.0 | 3.00 | 9.0 | – |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 19.0 | 4.00 | 13.0 | – | |
| 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 | ||||
| 347H | 515 | 205 | 40 | 92 | 201 |
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A corrosion-resistant product, Stainless Steel 347H nuts are available in sizes ranging from M6 to M64. They are designed for high-temperature applications, offering excellent creep resistance and stability in extreme conditions, suitable for aerospace and power generation industries.
A corrosion-resistant product, Stainless Steel 347H coupling nuts connect two male threads and come in sizes from M6 to M36. They provide high strength and thermal stability, making them ideal for high-temperature applications in industrial and aerospace settings.
A corrosion-resistant product, Stainless Steel 347H nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert prevents loosening under vibration, providing reliable performance in high-temperature environments where stability and security are crucial.
A corrosion-resistant product, Stainless Steel 347H flange hex nuts feature a built-in washer-like flange and come in sizes from M5 to M20. They offer enhanced load distribution and stability in high-temperature applications, ensuring durability and reliability.
A corrosion-resistant product, Stainless Steel 347H heavy hex nuts are larger and thicker, available in sizes from M10 to M48. They provide increased strength and thermal stability, making them suitable for heavy-duty and high-temperature industrial applications.
A corrosion-resistant product, Stainless Steel 347H square nuts have a larger surface area for contact, available in sizes from M6 to M30. They are ideal for high-temperature applications that require secure fastening in confined spaces and robust performance.
Stainless Steel 347H Nuts have extensive application across various industries, including aerospace, petrochemical, power generation, and shipbuilding. The ability of Stainless Steel 347H Nuts to withstand oxidation, stress corrosion cracking, and creep deformation, particularly under conditions of elevated temperatures, has rendered them best suited for exhaust manifold, heat exchanger, boiler, furnace hardware, and chemical processing plants applications. They provide safe and strong fastening under harsh environments and offer sustained performance, strength, and longevity.
Weston Stainless gives Mill Test Certificates (MTC) to the standards of EN 10204 3.1 as a guarantee for product quality. The SS 347H Nuts are then safely packed within wooden crates, corrugated boxes, or plastic wraps so that they arrive at their destination without damage. With effective logistical services and efficient delivery, Weston Stainless ensures that industries get optimum fastening products according to the needs of operations.
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