Harsh Metalloys is a trusted manufacturer and supplier of 348 Bolts in Mumbai, India, offering superior quality stainless steel fasteners designed for high-temperature and corrosive environments. Made from SS 348, a niobium-stabilized austenitic stainless steel, our bolts provide excellent resistance to intergranular corrosion and oxidation. Engineered for durability, strength, and reliability, these bolts are widely used in petrochemical, power generation, chemical processing, and refinery industries. Harsh Metalloys ensures precision manufacturing, strict quality control, and timely delivery, making us a preferred choice for critical industrial fastening applications requiring long-term performance under thermal stress.
348 Bolts are made from stainless steel containing 17–20% chromium, 8–13% nickel, and niobium (columbium) for stabilization, which prevents carbide precipitation and enhances corrosion resistance. The alloy exhibits tensile strength between 515–760 MPa and yield strength above 205 MPa. These bolts maintain excellent mechanical properties and ductility at elevated temperatures, offering good weldability and oxidation resistance. The stabilized structure provides resistance to intergranular attack after welding or prolonged heat exposure. Non-magnetic in the annealed condition, SS 348 bolts perform reliably in high-temperature, corrosive, and thermal cycling environments.
|
Material |
Specification |
Standards |
Size |
Length |
|
Stainless Steel 348 Bolts |
ASTM, ASME and API |
ASTM B 193 / ASME SB 193 |
M02 to M30 |
3 mm To 200 mm |
| Element | SS 348 |
| Tensile Strength (MPa) min | 480 |
| Yield Strength 0.2% Proof (MPa) min | 275 |
| Elongation (% in 50mm) min | 16 |
| Rockwell B (HR B) max Hardness | 95 |
| Brinell (HB) max Hardness | 201 |
| Element | SS 348 |
| Ni | 0.75 |
| C | 0.15 |
| Mn | 1.00 max |
| P | 0.04 max |
| S | 0.03 max |
| Si | 1.00 max |
| Cr | 11.5 – 13.5 |
| Mo | – |
| N | – |
Contact us to get a quick quote for your requirement.
Stainless Steel 348 bolts are high-temperature, corrosion-resistant fasteners designed for extreme environments. They offer excellent durability and strength, making them suitable for aerospace, petrochemical, and industrial applications.
Custom Stainless Steel 348 Hex Bolt is a custom designed fastener with a square head, providing superior thermal properties and excellent corrosion resistance Ideal for special applications requiring strength and reliability in extreme conditions.
Stainless Steel 348 leg bolt is a high-temperature, corrosion-resistant fastener with a threaded shaft and flat, leg-like design. It ensures strong, durable connections in extreme heat and harsh industrial settings.
Stainless steel 348 expansion anchor bolts are designed to anchor objects in concrete or masonry. It provides superior heat resistance and excellent corrosion protection, and extends the range of durable, durable wear for installation.
Stainless Steel 348 hex flange head bolt features a hexagonal head with an integrated flange, ensuring secure fastening and load distribution. It provides high-temperature resistance and excellent durability in harsh environments.
Stainless Steel 348 full threaded bolts have a completely threaded shaft, providing consistent engagement and grip. They offer high-temperature resistance and exceptional corrosion protection, suitable for demanding industrial and aerospace applications.
Each Stainless Steel 348 Bolt is carefully packed using high-quality materials to prevent rust and damage during shipping. We make sure timely delivery through efficient transportation. Aiming to exceed client expectations. Additionally, all relevant product documentation is provided to clients at the time of delivery, ensuring transparency and full compliance with industry standards.
348 Bolts from Harsh Metalloys are used extensively in industries where resistance to high temperatures and corrosion is critical. Common applications include boilers, heat exchangers, superheaters, chemical reactors, and power plant components. They are ideal for use in petrochemical plants, refineries, nuclear reactors, and thermal processing equipment. These bolts ensure secure fastening in welded assemblies and piping systems exposed to cyclic thermal stresses and aggressive chemical environments. Their durability and thermal stability make them a dependable choice for long-lasting, safe, and efficient operation in demanding industrial conditions.
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