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Punit Fasteners, a top-notch manufacturer and supplier located in Delhi, India, specializes in high-quality Stainless Steel 347 Washers that are perfect for high-temperature and corrosive environments. SS 347 is a niobium-stabilized austenitic stainless steel known for its outstanding resistance to intergranular corrosion, particularly after welding or exposure to heat. These washers are essential in industrial settings where both strength and corrosion resistance are paramount. Crafted with precision under strict quality control, Punit Fasteners offers SS 347 washers in a variety of sizes and thicknesses, adhering to international standards. Industries like aerospace, petrochemical, power generation, and food processing trust these washers for their durability and reliable performance.
Stainless Steel 347 Washers are made up of 17–19% chromium and 9–13% nickel, with niobium (columbium) added to enhance the alloy’s stability against carbide precipitation. This feature helps prevent intergranular corrosion in high-temperature or post-weld scenarios. These washers boast a tensile strength between 515–750 MPa and a yield strength of 205–500 MPa, along with impressive creep resistance at elevated temperatures (up to 870°C / 1600°F). In their annealed state, SS 347 washers are non-magnetic and maintain excellent toughness and formability, making them ideal for challenging mechanical and chemical environments where dimensional stability and oxidation resistance are crucial.
| 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 are perfect for applications where heat, corrosion, and stress resistance are vital. You’ll find them in chemical processing equipment, high-temperature exhaust systems, heat exchangers, pressure vessels, and piping systems. They shine in welded assemblies and systems that undergo frequent thermal cycling. Industries such as aerospace, refineries, marine engineering, and power generation depend on these washers for their reliability and long-lasting performance.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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