Stainless Steel 347 and 347H are austenitic stainless steel grades that are widely used in high-temperature applications. These grades offer excellent corrosion resistance, high strength, and good mechanical properties, making them suitable for various industries, including petrochemical, chemical, and aerospace.
Fasteners play a crucial role in ensuring the integrity and reliability of structures and equipment in these industries, and Stainless Steel 347/347H Fasteners are specifically designed to meet these demanding requirements.
Composition: Stainless Steel 347 is a stabilized austenitic stainless steel alloy containing chromium and nickel. The addition of niobium provides stabilization against sensitization during welding. On the other hand, Stainless Steel 347H is the high-carbon version of 347, which offers enhanced creep resistance at elevated temperatures.
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Corrosion Resistance: One of the primary advantages of Stainless Steel 347/347H Fasteners is their exceptional corrosion resistance. They exhibit resistance to intergranular corrosion and stress corrosion cracking, even in high-temperature environments. This makes them suitable for applications where exposure to corrosive substances is a concern.
High-Temperature Performance: Stainless Steel 347H Fasteners are designed to withstand high temperatures, making them ideal for applications in heat exchangers, boiler tubes, and other high-temperature environments. The alloy's ability to resist carbide precipitation at elevated temperatures enhances its overall performance in such conditions.
Mechanical Properties: These SS 347 fasteners offer excellent mechanical properties, including high tensile strength, toughness, and hardness. This ensures that they can withstand heavy loads and provide long-term reliability in critical applications.
Applications: Stainless Steel 347 Fasteners find applications in a variety of industries, such as chemical processing, petrochemical, power generation, and aerospace. They are commonly used in the construction of pressure vessels, heat exchangers, and piping systems where high strength and corrosion resistance are essential.
ASTM A193, A194 / ASME SA193, SA194
DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards
M3 - M100 | 3/6″ - 4″ | Custom Sizes
DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
UNF, BSW, BSF, METRIC, UNC, or as required
ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Hex, Threading, Square, Round as per Gauge Etc.
Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc.
| STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
| SS 347 | 1.4550 | S34700 | SUS 347 | 08Ch18N12B | X6CrNiNb18-10 |
| SS 347H | 1.4961 | S34709 | SUS 347H | – | X6CrNiNb18-12 |
| 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 % |
Oil & Gas Industrires
Chemical Industries
Construction Industries
Offshore Pipelines & Pipe Works
Petrochemical Industry
Shipbuilding Industries
Hydraulic Applications
Piping Systems
Refining Industry
Food Processing Industry
Pulp & Paper Industry
Power Plant Industry
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