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Harsh Metalloys is a leading manufacturer and supplier of 347H Stud Bolts based in Mumbai, India. Our 347H stud bolts are made from high-quality stainless steel designed to withstand extreme temperatures and corrosive environments. The 347H grade, stabilized with niobium, offers excellent resistance to intergranular corrosion and superior mechanical strength at elevated temperatures. These stud bolts are precision-engineered to meet international standards and serve critical applications in power plants, petrochemical industries, refineries, and chemical processing units. Harsh Metalloys guarantees durable, reliable fastening solutions with timely delivery and competitive pricing.
347H Stud Bolts are composed of stainless steel containing 17–19% chromium, 9–13% nickel, and niobium for stabilization. This composition prevents carbide precipitation, enhancing resistance to intergranular corrosion, especially after welding or high-temperature exposure. These bolts feature tensile strengths ranging from 515 to 760 MPa and a minimum yield strength of 205 MPa. The alloy maintains mechanical stability, toughness, and ductility under thermal stress and oxidation. Non-magnetic in the annealed condition, 347H stud bolts provide excellent creep resistance and durability for long-term use in high-temperature industrial applications.
|
Material |
Specification |
Standards |
Size |
Length |
|
Stainless Steel 347 / 347H Studbolt |
IS BS ASTM |
ASTM A193 B8C |
3 mm to 200 mm |
M02 to M33 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | – | 9.0 -13.0 | – |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 347H | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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Stainless Steel 347H Stud Bolts are engineered for high-temperature and corrosive environments, providing exceptional strength and durability. Their resistance to oxidation and thermal stability make them ideal for critical applications.
Stainless Steel UNS S34709 Stud Bolts deliver superior strength and corrosion resistance in extreme environments. Designed for high-temperature applications, they offer exceptional durability and performance under demanding conditions
Stainless Steel 347H Flush Head Stud Bolts combine high strength and corrosion resistance with a flush head design. Ideal for high-temperature applications, they provide a sleek, reliable fastening solution.
Harsh Metalloys ensures that the materials are of the highest quality, rigorously tested in terms of hardness, PMI, micro and macro testing, pitting resistance, and with regard to the above standards. We offer complete documentation, such as commercial invoices, packaging lists, and Certificate of Origin with a Third-Party Inspection Certificate, that promises transparency and 100% client satisfaction in our prices for Stainless Steel 347H Stud Bolts.
347H Stud Bolts from Harsh Metalloys are widely used in high-temperature and corrosive environments such as boilers, heat exchangers, superheaters, nuclear reactors, and petrochemical plants. Their resistance to thermal fatigue and intergranular corrosion makes them ideal for welded and high-stress assemblies. These stud bolts are critical components in power generation, oil refineries, and chemical processing industries where secure, leak-proof connections are essential. Their durability under continuous thermal cycling and harsh chemical exposure ensures reliable fastening, making them indispensable for maintaining structural integrity in demanding industrial conditions.
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