Stainless Steel 347/347H Fasteners are high performance fastening components designed for demanding industrial environments where strength, corrosion resistance, and long term stability are critical. These fasteners are widely used in heavy engineering sectors such as power generation, petrochemical processing, oil and gas installations, pressure equipment fabrication, and structural engineering projects. Industries that operate under elevated temperatures and corrosive conditions rely on stabilized stainless steel grades like 347 and 347H to ensure mechanical integrity and safety across assemblies, equipment frameworks, and load bearing structures.
Steel Icon Stainless Pvt. Ltd. manufactures Stainless Steel 347/347H Fasteners with strict quality control and precision engineering to support global industrial applications. These fasteners are available in various configurations including bolts, nuts, washers, threaded rods, and specialized industrial fastening components designed for complex fabrication environments. Their stability at high temperatures and resistance to intergranular corrosion make them suitable for boilers, heat exchangers, reactors, pipelines, and structural systems used in chemical processing plants and thermal power facilities.
Stainless Steel 347 and 347H are austenitic stainless steel grades stabilized with niobium and tantalum. These alloying elements prevent chromium carbide precipitation during welding or prolonged exposure to high temperatures. The stabilization process enhances resistance to intergranular corrosion, making these fasteners reliable for high heat industrial operations and fabrication processes that involve welding or thermal treatment.
The typical chemical composition includes chromium for corrosion resistance, nickel for toughness and ductility, and niobium for stabilization. Stainless Steel 347H contains a higher carbon content compared to standard 347 grade, which improves creep resistance and strength at elevated temperatures. Because of this metallurgical advantage, 347H fasteners are commonly used in pressure vessels, high temperature piping systems, refinery units, and structural assemblies exposed to thermal stress.
From a mechanical perspective, Stainless Steel 347/347H Fasteners provide excellent tensile strength, oxidation resistance, and structural durability. Their non magnetic nature, good formability, and resistance to scaling allow them to perform consistently in environments where conventional carbon steel fasteners would fail due to oxidation or corrosion.
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Stainless Steel 347/347H Fasteners provide a strong combination of mechanical strength and corrosion resistance that supports long term industrial reliability. Their stabilized microstructure prevents sensitization during welding and thermal cycling, which helps maintain structural integrity in fabricated equipment and pressure systems.
These fasteners demonstrate excellent resistance to high temperature oxidation and scaling, making them suitable for heat intensive industries such as power plants, petrochemical refineries, and thermal processing units. Their strength retention at elevated temperatures improves safety and performance in boilers, heat exchangers, and furnace components.
Durability is another key advantage. Stainless Steel 347/347H Fasteners perform well in aggressive chemical environments and corrosive atmospheres where exposure to acids, moisture, and high pressure gases is common. Their machinability allows precision threading and manufacturing, which ensures dimensional accuracy and easy installation in structural assemblies and industrial fabrication systems.
Cost efficiency also becomes evident over the long term. Because of their resistance to corrosion, fatigue, and thermal damage, these fasteners reduce maintenance costs, minimize equipment downtime, and extend the service life of mechanical installations.
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In chemical processing industries, Stainless Steel 347/347H Fasteners Manufacturers support the construction of reactors, piping networks, and pressure vessels where exposure to aggressive chemicals and elevated temperatures requires corrosion resistant fastening solutions. These fasteners maintain structural stability in environments involving acidic media, oxidizing agents, and continuous thermal cycling.
In oil and gas facilities, Stainless Steel 347/347H Fasteners Suppliers provide essential components used in offshore platforms, refinery equipment, and high pressure pipelines. Their ability to resist corrosion and oxidation makes them ideal for installations exposed to saltwater environments, hydrocarbon processing, and extreme temperature variations.
Within heavy engineering and fabrication sectors, Stainless Steel 347/347H Fasteners Stockists supply fastening solutions used in structural frameworks, industrial machinery, and fabrication systems built from stainless steel plates, pipes, tubes, and structural profiles. Their mechanical strength ensures reliable load distribution across large industrial assemblies.
In global infrastructure and industrial construction projects, Stainless Steel 347/347H Fasteners Exporters deliver precision engineered fastening components to international markets for use in power plants, nuclear facilities, heat exchangers, and energy generation equipment where reliability and metallurgical stability are critical.
Stainless Steel 347/347H Fasteners in United States, Stainless Steel 347/347H Fasteners Manufacturers in United States, Stainless Steel 347/347H Fasteners Suppliers in United States, Stainless Steel 347/347H Fasteners Stockists in United States, Stainless Steel 347/347H Fasteners Exporters in United States
Stainless Steel 347/347H Fasteners are produced according to internationally recognized standards that ensure mechanical performance, chemical composition accuracy, and dimensional reliability. Common specifications include ASTM A193 Grade B8C and ASTM A194 Grade 8C for high temperature bolting materials used in pressure vessels and piping systems. These fasteners also comply with ASME SA193 and ASME SA194 standards used in boilers, heat exchangers, and high pressure industrial equipment. Compliance with these standards ensures that the fasteners meet strict engineering requirements related to tensile strength, hardness, corrosion resistance, and thermal stability required in industrial fabrication and pressure equipment manufacturing.
Steel products used in industrial engineering are classified under globally recognized standards to ensure uniformity in quality and performance. Stainless steel bars, pipes, tubes, plates, sheets, and coils are identified based on their chemical composition, manufacturing process, and mechanical properties. Organizations such as ASTM, ASME, EN, DIN, JIS, and ISO provide standardized naming conventions for these materials. For example, ASTM and ASME standards are widely used in pressure vessel and piping industries, while EN and DIN standards are common across European engineering sectors. JIS specifications support Japanese manufacturing industries, and ISO standards help create global consistency in steel product classification. These standards allow engineers, procurement specialists, and fabrication companies to select appropriate materials for industrial fabrication, structural construction, chemical processing systems, and energy infrastructure projects.
Steel Icon Stainless Pvt. Ltd. is one of the leading manufacturer and supplier of Stainless Steel 347 Bolts, SS 347H Nuts, SS 347 Stud Bolts, SS 347H Screws, and SS 347 Threaded Fasteners at the best price in India.
Request Latest Price & Stock Availability| Specifications | ASTM A 193 / ASME SA 193 |
|---|---|
| Standard | DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards |
| Size | M3 - M100 | 3/6″ - 4″ | Custom Sizes |
| Fasteners Length | 3 mm - 200 mm | Custom Sizes |
| Nuts Size | M3 - M56 | 3/6" to 2" | Custom Sizes |
| Washers Size | M3 - M56 | 3/6" to 2" | Custom Sizes |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Threads available | UNF, BSW, BSF, METRIC, UNC, or as required |
| Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Form | Hex, Threading, Square, Round as per Gauge Etc. |
| Head | Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc. |
| Neck type | Hex, Square, Triangular, Oval & Knurled etc. |
| Surface Coating | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
| Manufacturing Process | Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing. |
| 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 % |
