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Hazlewood Fasteners, based in Canberra, Australia, is a reliable manufacturer and supplier of top-notch Stainless Steel 347H Nuts. These nuts are crafted for exceptional performance in high-temperature and corrosive settings, making them perfect for critical industrial applications that demand strength, durability, and thermal stability. Made from heat-resistant stainless steel, SS 347H Nuts boast enhanced mechanical properties and outstanding resistance to intergranular corrosion. Hazlewood Fasteners utilizes precision engineering and thorough quality testing to guarantee reliability and dimensional accuracy. These nuts find their place in various industries, including petrochemical, power generation, marine, and chemical processing, where long-lasting performance is crucial.
Stainless Steel 347H Nuts consist of 17–19% chromium, 9–13% nickel, and are stabilized with niobium (columbium) to prevent carbide precipitation during welding and exposure to high temperatures. The “H” grade signifies a higher carbon content (0.04–0.10%), which enhances creep strength and high-temperature tensile strength. These nuts demonstrate a tensile strength ranging from 515–700 MPa, a yield strength of about 205 MPa, and maintain stability up to 870°C. They offer excellent oxidation resistance, good ductility, and superior mechanical performance, making them ideal for extended use in heat-intensive and corrosive industrial environments.
| 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 |
| 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. |
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 347H Nuts are widely utilized in refineries, heat exchangers, boilers, pressure vessels, and exhaust systems where high-temperature strength and corrosion resistance are essential. Their stability during thermal cycling makes them perfect for chemical processing, power generation, aerospace, and marine applications. These nuts are also well-suited for welded assemblies that face prolonged heat exposure, as they resist intergranular corrosion and uphold structural integrity. Additionally, they are employed in food processing and other industries where reliability and performance under challenging conditions are paramount.
We maintain strict quality standards for our stainless steel 347H nuts, modeled by our carefully designed packaging. Our commitment extends to advanced packaging, with trade. We provide EN 10204/3.1b certificates, PMI test certificates, and 100% radiography test reports. Additionally, third-party inspection certificates further affirm our dedication to quality and reliability. We ensure that our products are securely protected during transit, arriving in optimal condition to meet the precise requirements of our customers.
Hazlewood Fasteners is a leading manufacturer and supplier of high-quality fasteners in Canberra, Australia, with over 8 years of experience serving global industries.
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