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Stainless Steel 347/347H Fasteners are high-performance fastening components manufactured from stabilized austenitic stainless steel grades containing columbium, also known as niobium. These fasteners are designed to maintain reliable mechanical properties and corrosion resistance in demanding service conditions, particularly where exposure to elevated temperatures can affect conventional stainless steel materials. Grade 347 is widely selected for general high-temperature applications, while 347H is the higher-carbon version developed to provide improved high-temperature strength.
Stainless Steel 347/347H Fasteners are available in forms such as bolts, nuts, screws, washers, studs, threaded rods, and other precision fastening components. Their stabilized composition helps reduce the risk of intergranular corrosion after exposure to temperatures associated with welding and high-temperature service. This makes them suitable for assemblies that require dependable fastening performance, dimensional stability, and resistance to aggressive industrial environments.
Technolloy Inc supplies Stainless Steel 347/347H Fasteners for engineering, fabrication, maintenance, and industrial projects where material reliability is essential. Fasteners can be manufactured or supplied in different sizes, thread configurations, surface finishes, dimensions, and standards according to project specifications and customer requirements.
Stainless Steel 347/347H Fasteners offer a strong combination of tensile strength, toughness, and structural reliability. The 347H grade is particularly suitable for applications involving elevated temperatures because its higher carbon content supports improved strength at high operating temperatures. This allows threaded connections and bolted assemblies to maintain dependable performance under demanding mechanical and thermal loads.
Corrosion resistance is one of the key advantages of Stainless Steel 347/347H Fasteners. Their chromium-rich stainless steel composition provides resistance against oxidation and many corrosive industrial environments. The stabilized grade is also designed to reduce susceptibility to intergranular corrosion following exposure to elevated temperatures, making it a practical choice for fabricated equipment and welded assemblies.
These fasteners are engineered for long service life in demanding operating conditions. Their resistance to heat, corrosion, vibration, and general industrial wear can help maintain the integrity of bolted joints over extended periods. Properly selected 347/347H fasteners can reduce the need for frequent replacement and support consistent equipment availability.
Stainless Steel 347/347H Fasteners can be produced using established machining, threading, cold-working, and hot-working processes appropriate to the grade and component design. Their fabrication characteristics allow manufacturers to produce precise threads and dimensional profiles for different fastening requirements. Correct tooling, machining parameters, and finishing practices help achieve reliable dimensional accuracy.
Although stainless steel fasteners can have a higher initial material cost than ordinary carbon steel alternatives, 347/347H fasteners can provide better lifecycle value in applications where corrosion and heat resistance are important. Their durability can reduce maintenance interruptions, replacement frequency, and the risk of premature fastening failure, contributing to improved total cost efficiency.
Stainless Steel 347/347H Fasteners are well suited to projects where stable performance is required over many operating cycles. Their combination of corrosion resistance, thermal capability, mechanical strength, and dimensional reliability makes them a dependable fastening solution for process equipment, power-generation systems, chemical installations, and other industrial assemblies.
Stainless Steel 347/347H Fasteners Manufacturers support petrochemical and chemical processing projects where fastening components may be exposed to corrosive media, elevated temperatures, pressure, and demanding maintenance conditions. These fasteners are suitable for equipment such as process piping, heat exchangers, reactors, valves, flanges, and associated plant assemblies where material stability is important.
Stainless Steel 347/347H Fasteners Suppliers provide fastening solutions for power-generation applications involving steam, heat, pressure, and thermal cycling. They can be used in boilers, steam piping, turbine-related equipment, heat recovery systems, and high-temperature plant components where dependable fastening performance is required during continuous operation.
Stainless Steel 347/347H Fasteners Stockists serve maintenance and fabrication requirements for heat exchangers, furnace components, thermal processing equipment, and high-temperature piping systems. The stabilized stainless steel composition makes these fasteners appropriate for assemblies that experience repeated heating and cooling while requiring resistance to corrosion and oxidation.
Stainless Steel 347/347H Fasteners Exporters supply components for oil and gas installations where equipment can encounter pressure, temperature variation, moisture, and corrosive process conditions. They can be used for flanged connections, valves, pressure equipment, piping assemblies, skids, and other industrial systems requiring robust fastening materials.
Stainless Steel 347/347H Fasteners are also used in specialized aerospace and high-temperature engineering applications where dimensional stability, mechanical strength, and resistance to elevated-temperature environments are important. Component selection is generally based on the required temperature range, mechanical loading, corrosion exposure, applicable standards, and engineering specifications.
Industrial fabrication and maintenance teams use Stainless Steel 347/347H Fasteners when replacing existing fastening hardware or constructing new assemblies that require improved resistance to heat and corrosion. Their availability in multiple dimensions and configurations allows them to support customized machinery, structural assemblies, processing equipment, and repair projects.
Stainless Steel 347/347H Fasteners can be supplied in accordance with applicable ASTM, ASME, ANSI, DIN, ISO, and other internationally recognized specifications, depending on the fastener type and customer requirements. Common considerations include material certification, dimensional tolerances, thread specifications, mechanical properties, heat treatment, surface condition, and inspection documentation.
Technolloy Inc can supply these fasteners in standard and customized dimensions, with availability based on size, quantity, configuration, grade, finish, and project requirements. Material test certificates and inspection documentation can be arranged where required for industrial procurement and quality-control procedures.
Technolloy Inc focuses on supplying stainless steel fastening products for industrial buyers seeking consistent material quality, dependable dimensional accuracy, and application-focused solutions. Stainless Steel 347/347H Fasteners can be sourced for domestic and international requirements, with product specifications aligned with the technical needs of each project. Buyers can specify dimensions, quantities, standards, thread forms, finishes, and documentation requirements when requesting a quotation.
| Specification | ASTM F593, F594, A193, A194 / ASME SA193, SA194 |
|---|---|
| Dimensions | ASME B18.2.1, ASME B18.3, DIN 931, DIN 933, DIN 934, DIN 7991, DIN 976 |
| Standard | DIN, GB, BS, ISO, IS, JIS, ASTM, ASME, EN, etc. |
| Size | M02 to M33 |
| Length | 3 mm to 200 mm |
| Threads | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Types | Nuts, Bolts, Screws, Sockets, Studs, Screw, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw, Washers, Spring Washers, Studs, Anchors, Marine Anchors, Nut, Hexagon Nut, Hex Nut, Hex Coupling Nut, Hex Domed Cap Nuts, Square Nut, Stud Bolts, Hex Head Bolts, Socket Hexagon Head Screw Anchor Bolt, U- Bolts, J Bolts, Mushroom Head Square Neck Bolts, T-Head Bolts, Wing Screw, Eye Bolt, Foundation Bolts, Structural Bolts. |
| Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
|---|---|---|---|---|---|---|---|---|---|
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
| SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 8xC – 1.10 | 9.0 -13.0 | 63.72 min |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
They are used for bolted and threaded connections in chemical processing, petrochemical plants, power generation, heat exchangers, high-temperature piping, oil and gas equipment, and other demanding industrial applications.
Grade 347H contains a higher carbon level than standard 347 and is generally selected when greater strength is required at elevated temperatures. The appropriate grade depends on operating conditions and engineering specifications.
Yes. Their chromium-containing austenitic stainless steel composition provides strong corrosion and oxidation resistance, while the stabilized structure helps improve resistance to intergranular corrosion after elevated-temperature exposure.
Yes. Stainless Steel 347/347H Fasteners can be supplied in different diameters, lengths, thread configurations, finishes, and component types according to drawings, standards, and customer specifications.
Pricing depends on grade, fastener type, dimensions, quantity, finish, applicable standard, testing requirements, and delivery destination. A project-specific quotation can provide the most accurate commercial price.
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