Nakamura Stainless, located in Pulau Ujong, Singapore, is a trusted manufacturer and supplier of premium stainless steel products, including stainless steel 347H fasteners. These fasteners are designed for high-temperature and corrosive environments. They offer excellent resistance to intergranular corrosion and superior creep strength. Stainless steel 347H, which is a high-carbon version of 347 stabilized with niobium, ensures durability and strength during prolonged exposure to high temperatures. Nakamura Stainless provides precision-engineered fasteners that meet strict quality standards. This makes them ideal for demanding applications in the petrochemical, power generation, and refinery industries.
Stainless steel 347H fasteners are made from an austenitic stainless steel alloy that contains 17% to 19% chromium, 9% to 13% nickel, and niobium (columbium) for stabilization. The higher carbon content improves the fasteners’ high-temperature strength and creep resistance, while niobium prevents carbide precipitation during welding or thermal exposure. These fasteners typically provide tensile strength between 550 and 750 megapascals and maintain their mechanical integrity at temperatures exceeding 800°C. They also show good weldability, oxidation resistance, and thermal stability for long-term high-heat service.
|
Material |
Specification |
Standards |
Size
|
Length |
|
Stainless Steel 347H Fasteners
|
IS
BS
ASTM
|
ASTM / ASME – A/ SA 193 |
3 mm
to
200 mm
|
M02 to M33
|
| Grade | Mn | N | P | C | S | Cr | Mo | Si | Ni | Other | |
| 347H | min. max | 2.00 | – | 0.045 | 0.04 0.10 | 0.030 | 17.0 19.0 | 3 – 4 | 0.75 | 9.00 13.00 | – – |
| 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 | 95 | 217 |
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Highly resistant to corrosion, Stainless Steel 347H Nuts are ideal for high-temperature environments. Available in sizes from M2 to M64, they offer robust performance in harsh conditions, maintaining structural integrity and reliability.
Corrosion-resistant and suited for high-stress applications, Stainless Steel 347H Stud Bolts come in diameters ranging from M6 to M36 and lengths up to 1000 mm. They are used in industrial settings where high strength and resistance to oxidation are required.
Featuring excellent resistance to oxidation and corrosion, Stainless Steel 347H Bolts are available in sizes from M5 to M50, with lengths varying from 10 mm to 300 mm. They are ideal for high-temperature and corrosive environments.
Highly resistant to corrosion, Stainless Steel 347H threaded rods are available in diameters from M6 to M36 and lengths up to 3000 mm. They provide excellent mechanical strength and are used in high-temperature applications.
Offering superb corrosion resistance, Stainless Steel 347H screws are available in sizes from M3 to M20 and lengths ranging from 10 mm to 100 mm. They are suitable for high-temperature and aggressive chemical environments.
Corrosion-resistant and durable Stainless Steel 347H washers come in sizes ranging from M2 to M64. They are designed to distribute load evenly and prevent surface damage in high-temperature and corrosive environments.
We have incorporated comprehensive documentation with Stainless Steel 347H Fasteners like commercial invoice, packing list, fumigation certificate, heat treatment chart, quality assurance plan, NABL-approved lab test report etc. To ensure full satisfaction for customers, several test certificates with our Stainless Steel 347H Fasteners are also provided, including Material Test Certificate (MTC) as per the EN 10204/3.1b, PMI Test Certificate, 100% radiography test report, and Third Party Inspection Certificate.
Stainless steel 347H fasteners are widely used in applications that require high strength, corrosion resistance, and thermal durability. They are often used to secure components in heat exchangers, boilers, pressure vessels, furnace parts, and high-temperature piping systems. These fasteners perform reliably in harsh environments that involve thermal cycling and elevated temperatures. This makes them essential in the petrochemical, power generation, aerospace, and chemical processing sectors for safe, long-lasting connections.
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