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Punit Fasteners, a reputable manufacturer and supplier located in Delhi, India, specializes in high-quality Stainless Steel 347 Stud Bolts designed for extreme temperatures and corrosive environments. Crafted from niobium-stabilized austenitic stainless steel, these bolts are engineered to resist intergranular corrosion and provide outstanding creep strength. They are tailored for demanding applications across various industries, including chemical processing, aerospace, power generation, and oil & gas. With a commitment to precision and quality, Punit Fasteners offers these fasteners in a range of lengths, thread types, and finishes to meet the unique needs of their clients.
Stainless Steel 347 Stud Bolts consist of 17–19% chromium, 9–13% nickel, and trace amounts of niobium (columbium), which helps stabilize the alloy against carbide precipitation during welding. This stabilization is crucial for preventing intergranular corrosion and ensuring strength at elevated temperatures. SS 347 boasts a tensile strength ranging from 515–750 MPa and a yield strength between 205–500 MPa, depending on the condition. These stud bolts maintain their mechanical integrity under thermal stress and exhibit excellent resistance to oxidation and creep. The alloy remains non-magnetic when annealed and is suitable for high-temperature applications up to 870°C (1600°F).
| Grade | Stainless Steel 347, 347H |
| Specifications | ASTM A193 / ASME SA193, DIN, ASTM, BS and all International Standards |
| Length | 3mm to 200mm |
| Size | M 02 to M 160, Custom Sizes |
| Types | Threaded Rod, Class A double ended stud, Tie Rod, Double Ended Stud, Stud Bolts, Bronze Hex Studs, Threaded Studs etc |
| Grade | Yield Strength 0.2% Proof (MPa) min | Tensile Strength (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347 | 205 | 515 | 40 | 95 | 201 |
| Grade | Density (kg/m3) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | |||
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| 347 | 8000 | 500 | 720 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Stainless Steel 347 Stud Bolts find extensive use in high-temperature, high-pressure, and corrosive environments. They are perfect for heat exchangers, boiler systems, pressure vessels, exhaust manifolds, reactors, and piping systems in the chemical and petrochemical sectors. Their resistance to intergranular corrosion makes them particularly well-suited for welded structures and systems that experience thermal cycling. Industries such as aerospace, refining, and power generation also depend on SS 347 for reliable performance.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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