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Punit Fasteners, based in Delhi, India, stands out as a top-notch manufacturer and supplier of high-quality stainless steel fasteners, particularly known for their Stainless Steel 347 bolts. The company prides itself on its dedication to quality, precision, and timely delivery, ensuring that their fasteners not only meet international standards but also perform reliably in extreme conditions. Their Stainless Steel 347 bolts are specifically designed to resist intergranular corrosion and handle high temperatures with ease. Catering to industries like petrochemical, aerospace, and power generation, Punit Fasteners has earned a solid reputation as a dependable partner for durable and efficient fastening solutions throughout India and beyond.
Stainless Steel 347 is an austenitic alloy that mainly consists of 17–20% chromium, 9–13% nickel, and is stabilized with niobium (columbium) to prevent carbide precipitation. It also includes trace amounts of carbon, manganese, silicon, and phosphorus. This alloy is known for its excellent resistance to intergranular corrosion and its ability to maintain mechanical strength even at elevated temperatures. With a minimum tensile strength of 515 MPa, yield strength of 205 MPa, and an elongation of about 35–40%, it boasts a Rockwell hardness of roughly 95 HRB. These properties make 347 bolts perfect for high-heat and stress-intensive applications in challenging environments.
| 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 bolts find their place in various applications where high-temperature resistance and protection against intergranular corrosion are critical. They are commonly used in industries such as chemical processing, petroleum refining, and aerospace. These bolts are particularly suited for high-pressure steam systems, boiler components, superheaters, heat exchangers, and welded equipment that undergo thermal cycling. Thanks to their niobium stabilization, they ensure long-lasting structural integrity in conditions where carbide precipitation could compromise joints. Additionally, 347 bolts are utilized in marine applications and exhaust systems, where their durability and resistance to oxidation are vital for performance and safety in demanding service conditions.
At Punit Fasteners, we take great care in packaging our Stainless Steel 347 bolts to ensure they arrive in top condition. Our packaging solutions use sturdy materials and secure methods to protect the bolts from damage during transit. Each package is meticulously labeled with detailed product information for easy identification and efficient handling. Whether you order in small or large quantities, our precise packaging process guarantees that your Stainless Steel 347 bolts are delivered intact and ready for use in demanding applications.
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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