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The Fasteners Mart, with its head office in Mumbai, India, is a reputed manufacturer and exporter of high-performance fastening solutions to industries globally. We specialize in precision-engineered products to international quality standards. Among our high-end products are Stainless Steel 347 Nuts, manufactured from Grade 347 austenitic stainless steel. These niobium (columbium) stabilized hexagonal-shaped nuts are characterized by excellent resistance to intergranular corrosion and high-temperature oxidation. They are best suited for challenging applications where there is a need for strength, heat stability, and corrosion resistance.
Stainless Steel 347 Nuts are composed of chromium (17–19%), nickel (9–13%), carbon (≤0.08%), and are stabilized with niobium (columbium) to avoid carbide precipitation. Additional constituent elements are silicon, manganese, and trace sulfur and phosphorus. They possess tensile strength of 515–750 MPa, yield strength of about 205 MPa, and hardness of up to 201 HB. Being dense at 7.93 g/cm³ and having a melting range between 1398–1446°C, they exhibit excellent high-heat performance and corrosion environments with their mechanical properties remaining in tact even on prolonged exposure at high temperatures.
| Specifications | : | ASTM A 193 ASME SA 193 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts, Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347 | min. | – | – | – | – | – | 17.0 | 2.00 | 9.0 | – |
| max. | 0.08 | 2.0 | 1.00 | 0.045 | 0.030 | 20.0 | 3.00 | 13.0 | – | |
| 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 | ||||
| 347 | 515 | 205 | 40 | 95 | 201 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Stainless Steel 347 Nuts are particularly suited for high temperature applications such as heat exchangers, boilers, pressure vessels and chemical process equipment. They find broad applications in the aerospace, refinery, and power generation sectors. Because of their resistance to thermal stress and intergranular corrosion, they are especially useful in applications where there is repeated thermal cycling or where there is long term exposure to elevated temperatures. These nuts provide long-lasting fastening solutions in structurally challenging environments where normal stainless steel grades may not be as effective.
The Fasteners Mart offers timely and secure Stainless Steel 347 Nuts to domestic and global customers. Materials are packaged with moisture-resistant wraps, bubble wrappings, thick cartons, or wooden cases to ensure items are not damaged during transportation. Packages are accurately labeled for safety and easy recognition.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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