Harsh Metalloys stands out as a premier manufacturer and supplier based in Mumbai, India, specializing in high-quality Stainless Steel 347 Bolts. These bolts are expertly crafted to withstand high temperatures, intense pressure, and corrosive environments. SS 347 is an austenitic stainless steel alloy that’s stabilized with niobium (columbium) to guard against intergranular corrosion, particularly after welding or exposure to heat. Designed to comply with ASTM A193 and other global standards, these bolts promise exceptional strength, durability, and reliability. With remarkable resistance to oxidation and scaling at elevated temperatures, SS 347 bolts are perfect for refineries, chemical processing plants, power generation facilities, and other industrial settings that require dependable performance.
Stainless Steel 347 Bolts are made up of 17–20% Chromium and 9–13% Nickel, with Niobium added (minimum Nb ≥ 10xC) for stabilization. This unique chemical makeup helps prevent carbide precipitation and boosts performance in high-heat situations. These bolts showcase a tensile strength ranging from 515–690 MPa, are non-magnetic when annealed, and offer excellent resistance to oxidation and creep at temperatures up to 870°C. They also boast good weldability and maintain mechanical integrity during thermal cycling. Their stabilized structure guarantees long-lasting reliability in welded and pressurized assemblies, even in harsh chemical and thermal conditions.
|
Material |
Specification |
Standards |
Size |
Length |
|
Stainless Steel 347 Bolts |
ASTM, ASME and API |
ASTM B 193 / ASME SB 193 |
M02 to M30 |
3 mm To 200 mm |
| Element | SS 347 |
| 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 347 |
| 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 | – |
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If you’re looking for bolts that can stand up to tough conditions, corrosion-resistant 347 bolts are a fantastic choice. They boast impressive strength and heat resistance, making them perfect for industrial, chemical, and power generation settings where extreme temperatures are the norm.
Need something tailored to your specific needs? Custom 347 hex bolts are designed for a precise fit and exceptional durability. With their superior oxidation resistance, they’re ideal for specialized industrial fastenings in harsh, high-temperature environments.
When it comes to strong, corrosion-resistant fastening, 347 leg bolts are up to the task. They offer excellent heat tolerance and are commonly used in machinery, structural supports, and various industrial assemblies.
For secure anchoring in concrete and masonry, 347 expansion anchor bolts are a reliable option. They provide high-temperature resistance and are well-suited for heavy-duty industrial and structural applications.
Combining the strength of a flange with corrosion resistance, 347 hex flange head bolts are built to last. They offer excellent vibration resistance and durability, making them a great fit for power plants and the chemical industry.
Fully threaded 347 bolts are designed to maximize grip and load distribution. They’re perfect for demanding high-temperature applications found in refineries, heat exchangers, and industrial piping systems.
Stainless Steel 347 Bolts are extensively used in high-temperature service applications such as heat exchangers, boilers, superheaters, and furnace components. Their stabilized chemistry makes them ideal for welded assemblies in chemical processing and petrochemical plants. These bolts are also used in power generation systems, exhaust manifolds, and aerospace equipment where high creep strength and resistance to intergranular corrosion are critical. SS 347 bolts ensure secure, long-lasting connections in harsh conditions, including thermal cycling and exposure to oxidizing chemicals. Their strength, stability, and resistance to scale formation make them a preferred fastening solution for industrial and structural systems.
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