Khaled Stainless, located in Cairo, Egypt, specializes in providing Stainless Steel 347 fasteners that are designed for reliable performance in high-temperature and corrosive environments. These fasteners, which include bolts, nuts, washers, studs, and other special components, are made from niobium-stabilized stainless steel. They are crafted with careful attention to chemistry, precise threading, and strict dimensional accuracy to ensure long-lasting joint integrity. SS 347 fasteners are commonly supplied to refineries, petrochemical plants, boiler manufacturers, and thermal processing industries, where standard 304/316 fasteners might fail due to carbide precipitation. With full material traceability, consistent quality, and reliable delivery schedules, Khaled Stainless is committed to supporting critical bolting systems that require heat-stable, corrosion-resistant fastening solutions.
Stainless Steel 347 is a niobium-stabilized austenitic stainless steel that typically contains about 17–19% chromium, 9–13% nickel, and controlled amounts of niobium to prevent carbide precipitation during welding or high-temperature use. The carbon content is usually kept below 0.08%. Its mechanical properties are impressive, with tensile strength ranging from 515–750 MPa, yield strength around 205–310 MPa, and elongation between 30–40%. SS 347 excels in intergranular corrosion resistance, offers strong thermal stability, and maintains reliable mechanical performance in continuous service temperatures of 425–900°C, outperforming non-stabilized grades in welded and heat-exposed situations.
|
Material |
Specification |
Standards |
Size
|
Length |
|
Stainless Steel 347 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 | |
| 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 |
Contact us to get a quick quote for your requirement.
Highly corrosion-resistant, Stainless Steel 347 Nuts are designed to withstand high temperatures and corrosive environments. They are available in various sizes, typically from M4 to M36, and standard dimensions such as 6mm to 30mm in thickness.
Offering excellent resistance to oxidation and corrosion, Stainless Steel 347 Stud Bolts come in sizes ranging from M6 to M36, with lengths varying from 25mm to 300mm. They are ideal for high-temperature and chemical-resistant applications.
Corrosion-resistant and durable, Stainless Steel 347 Bolts are used in extreme environments. They are available in sizes from M6 to M36 and standard lengths from 16mm to 100mm, suitable for high-stress applications and high-temperature conditions.
Known for their high corrosion resistance and stability under heat, Stainless Steel 347 threaded rods are available in diameters from M6 to M36 and lengths ranging from 100mm to 3000mm. They are used in heavy-duty and high-temperature settings.
Featuring excellent resistance to oxidation and corrosion, Stainless Steel 347 screws come in sizes from M3 to M20, with lengths from 10mm to 150mm. They are suited for high-temperature and corrosive environments.
With superior corrosion and high-temperature resistance, Stainless Steel 347 washers are available in diameters ranging from M4 to M36. Thickness varies from 0.5mm to 5mm, making them suitable for various applications where durability is critical.
We always focuse on customer experience by way of our quality Stainless Steel 347 Fasteners. Every consignment comes attached with commercial invoices, packing lists, heat treatment charts, plans for quality assurance, and the NABL-approved lab test reports to establish genuineness and quality with client satisfaction.
SS 347 fasteners are ideal for bolting applications that face high temperatures, corrosive environments, and frequent thermal cycling. You’ll find them in various applications, including boiler and superheater assemblies, furnace and heat-treatment equipment, refinery piping, petrochemical reactors, exhaust systems, thermal oxidizers, and power-plant steam circuits. Thanks to their niobium stabilization, these fasteners provide exceptional performance in challenging conditions, ensuring that they stand up to the rigors of demanding industrial environments.
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