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Harsh Metalloys, a prominent manufacturer and supplier located in Mumbai, India, specializes in top-notch Stainless Steel 347 Stud Bolts, perfect for high-temperature, corrosive, and high-stress settings. SS 347 is an austenitic stainless steel that’s stabilized with niobium (columbium), which gives it remarkable resistance to intergranular corrosion and helps prevent carbide precipitation during welding and heat exposure. These stud bolts are crafted to comply with ASTM A193 and other international standards, ensuring they are durable, mechanically sound, and resistant to corrosion. They’re particularly suited for the chemical, petrochemical, aerospace, and power generation sectors, where long-lasting stability and performance are essential.
Stainless Steel 347 Stud Bolts are made up of 17–20% Chromium, 9–13% Nickel, and Niobium (Nb ≥ 10xC) to stabilize the alloy and guard against intergranular corrosion. They boast a tensile strength ranging from 515–690 MPa and retain excellent mechanical properties even at elevated temperatures up to 870°C. This alloy is non-magnetic when annealed, weldable, and highly resistant to oxidation and scaling. Thanks to SS 347’s stabilized chemistry, it performs reliably in welded structures that face aggressive thermal cycles, providing outstanding creep strength and resistance to stress rupture in high-temperature conditions.
| 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 |
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Looking for reliable fasteners? Check out our Stainless Steel 347 Stud Bolts! These corrosion-resistant bolts are known for their impressive strength and thermal stability, making them a go-to choice for flange connections and industrial fastenings in power plants and chemical facilities.
For secure installations, look no further than our Stainless Steel 347 Stud Anchor Bolts. These bolts ensure a solid fix in concrete and heavy machinery, maintaining their strength and resistance to corrosion even in high-temperature industrial environments.
And don’t forget about our Stainless Steel 347 Stud Exhaust Bolts! These specialized bolts are designed to resist oxidation and thermal fatigue, making them perfect for use in exhaust systems, turbines, and automotive high-temperature assemblies.
Finally, our Stainless Steel 347 Hex Stud Bolts offer a great combination of easy installation and robust strength. With excellent corrosion resistance, they’re ideal for industrial flanges, piping, and fastening heavy equipment.
Stainless Steel 347 Stud Bolts are widely used in industries that operate under extreme heat and corrosive conditions. Typical applications include boilers, heat exchangers, reactor vessels, exhaust manifolds, and high-temperature piping systems in the chemical, petrochemical, and power generation sectors. These bolts are particularly suited for welded assemblies exposed to long-term high heat where carbide precipitation is a concern. They are also used in aerospace systems, thermal processing equipment, and refinery infrastructure. The combination of strength, thermal resistance, and corrosion protection makes SS 347 stud bolts a dependable fastening solution for critical industrial operations.
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