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The Fasteners Mart of Mumbai, India, is one of the largest manufacturers and distributors of industrial-quality fasteners that are renowned for quality, consistency, and world-class service. Our product offering consists of various stainless steel pieces, such as Stainless Steel 347 Washers. Made of Grade 347 austenitic stainless steel, these flat disc-shaped washers are stabilized using niobium (columbium) for enhanced intergranular corrosion resistance. They are suitable for high-temperature use, with structural support and load distribution in bolted joints in demanding industrial applications.
Stainless Steel 347 Washers consist of chromium (17–19%), nickel (9–13%), carbon (≤0.08%), and niobium for stabilization. Trace amounts of manganese, silicon, phosphorus, and sulfur are present as well. They provide a tensile strength of 515–750 MPa and yield strength of approximately 205 MPa, with a Brinell hardness of up to 201 HB. The density is around 7.93 g/cm³, and the melting point is between 1398–1446°C. These washers maintain their structural characteristics under extended high-temperature exposure and thermal cycling.
| 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. |
| Element | SS 347 |
| Ni | 9.0 – 13.0 |
| C | 0.08 |
| Mn | 2.0 max |
| P | 0.045 max |
| S | 0.030 max |
| Si | 0.75 max |
| Cr | 17.0 – 19.0 |
| Mo | – |
| N | – |
| Element | SS 347 |
| Tensile Strength (MPa) min | 515 |
| Yield Strength 0.2% Proof (MPa) min | 205 |
| Elongation (% in 50mm) min | 40 |
| Rockwell B (HR B) max Hardness | 92 |
| Brinell (HB) max Hardness | 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 Washers find widespread applications in corrosive and high-temperature environments including oil refineries, chemical processing, power generation, and aerospace. Their good resistance to intergranular corrosion makes them best suited for heat exchangers, furnace components, and exhaust systems. They assist in uniform load pressure distribution, vibration damping, and increased joint stability for bolted connections. They are particularly ideal for welding and thermal cycling applications where dimensional stability and scaling resistance are paramount.
The Fasteners Mart provides safe and timely delivery of Stainless Steel 347 Washers within the country and abroad. Every shipment is properly packaged in moisture-resistant material, bubble wrap, and robust cartons or wooden boxes. Proper labeling and handling guarantee product integrity during transportation.
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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