Harsh Metalloys is a reputable manufacturer and supplier of Stainless Steel 347H fasteners, proudly based in Mumbai, India. We focus on providing top-notch, heat-resistant fasteners that are engineered to perform in extreme temperatures and corrosive settings. Our SS 347H fasteners are crafted from high-quality raw materials and utilize cutting-edge production methods to guarantee outstanding strength, durability, and reliability. We cater to a variety of industries, including petrochemical, aerospace, thermal processing, and power generation. Harsh Metalloys has built a solid reputation for its dedication to product quality, prompt deliveries, and exceptional customer service, both in India and around the globe.
Stainless Steel 347H fasteners are composed of an austenitic stainless steel alloy that contains 17–20% chromium, 9–13% nickel, and columbium (niobium) to prevent intergranular corrosion. The “H” designation signifies a higher carbon content, which boosts creep strength at elevated temperatures. These fasteners provide a tensile strength of about 515 MPa and a yield strength of roughly 205 MPa. They are known for their excellent resistance to heat, oxidation, and corrosion, especially in highly oxidizing environments. Additionally, SS 347H fasteners are easy to weld, form, and are built to last, making them perfect for high-temperature applications.
|
Material |
Specification |
Standards |
Size
|
Length |
|
Stainless Steel 347H Fasteners
|
IS
BS
ASTM
|
ASTM / ASME – A/ SA 193 |
3 mm
to
200 mm
|
M02 to M33
|
| Grade | Mn | N | P | C | S | Cr | Mo | Si | Ni | Other | |
| 347H | min. max | 2.00 | – | 0.045 | 0.04 0.10 | 0.030 | 17.0 19.0 | 3 – 4 | 0.75 | 9.00 13.00 | – – |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347H | 515 | 205 | 40 | 95 | 217 |
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Highly resistant to corrosion, Stainless Steel 347H Nuts are ideal for high-temperature environments. Available in sizes from M2 to M64, they offer robust performance in harsh conditions, maintaining structural integrity and reliability.
Corrosion-resistant and suited for high-stress applications, Stainless Steel 347H Stud Bolts come in diameters ranging from M6 to M36 and lengths up to 1000 mm. They are used in industrial settings where high strength and resistance to oxidation are required.
Featuring excellent resistance to oxidation and corrosion, Stainless Steel 347H Bolts are available in sizes from M5 to M50, with lengths varying from 10 mm to 300 mm. They are ideal for high-temperature and corrosive environments.
Highly resistant to corrosion, Stainless Steel 347H threaded rods are available in diameters from M6 to M36 and lengths up to 3000 mm. They provide excellent mechanical strength and are used in high-temperature applications.
Offering superb corrosion resistance, Stainless Steel 347H screws are available in sizes from M3 to M20 and lengths ranging from 10 mm to 100 mm. They are suitable for high-temperature and aggressive chemical environments.
Corrosion-resistant and durable Stainless Steel 347H washers come in sizes ranging from M2 to M64. They are designed to distribute load evenly and prevent surface damage in high-temperature and corrosive environments.
We have incorporated comprehensive documentation with Stainless Steel 347H Fasteners like commercial invoice, packing list, fumigation certificate, heat treatment chart, quality assurance plan, NABL-approved lab test report etc. To ensure full satisfaction for customers, several test certificates with our Stainless Steel 347H Fasteners are also provided, including Material Test Certificate (MTC) as per the EN 10204/3.1b, PMI Test Certificate, 100% radiography test report, and Third Party Inspection Certificate.
These fasteners are particularly well-suited for situations that involve high temperatures and corrosive conditions, such as furnace components, heat exchangers, pressure vessels, and high-temperature piping systems. They find extensive use in petrochemical plants, power generation facilities, aerospace engines, and thermal processing equipment. Their ability to resist intergranular corrosion and thermal fatigue ensures they perform reliably in environments with frequent temperature changes. SS 347H fasteners are also ideal for exhaust manifolds, boiler components, and reactor vessels. With their impressive strength, heat resistance, and structural integrity, they are a trustworthy choice for demanding applications.
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