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Punit Fasteners is a well-respected manufacturer and supplier of Stainless Steel 317/317L Bolts, proudly based in Delhi, India. We serve a diverse array of industries that demand high corrosion resistance and dependable mechanical performance. Our bolts are crafted from molybdenum-bearing austenitic stainless steels—specifically SS 317 and its low-carbon counterpart, 317L—engineered to provide exceptional resistance to chemical attacks in acidic and chloride-rich environments. You can find our Stainless Steel 317/317L Bolts in a variety of sizes, thread types, and finishes, perfectly tailored to meet the needs of the chemical processing, pulp and paper, marine, and petrochemical sectors, all while ensuring precision and durability.
Stainless Steel 317 boasts higher levels of molybdenum (3.0–4.0%) and chromium (18–20%), which significantly boosts its resistance to pitting and crevice corrosion. On the other hand, 317L features a lower carbon content (max 0.03%), enhancing its weldability and reducing the risk of intergranular corrosion post-welding. These bolts deliver impressive mechanical strength, with tensile strength ranging from 515 to 620 MPa, along with good ductility and toughness, even in cryogenic conditions. Both grades are known for their robust resistance to sulfide and chloride corrosion.
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo | N |
| SS 317 | 0.08 max. | 2.00 max. | 1.00 max. | 0.045 max. | 0.03 max. | 18.0 – 20.0 | 11.0 – 14.0 | 3.0 – 4.0 | – |
| SS 317L | 0.03 max. | 2.00 max. | 0.75 max. | 0.045 max. | 0.03 max. | 18.0 – 20.0 | 11.0 – 15.0 | 3.0 – 4.0 | 0.1 |
| 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 | ||||
| 317 | 620 MPa | 275 MPa | 45% | 85 | 193 |
| 317L | 595 MPa | 260 MPa | 55% | 85 | 200 |
Material | Specification | Standards | Size | Length |
Stainless Steel 317 / 317L Bolts
| IS BS ASTM | ASTM / ASME – A/ SA 193 | 3 mm | M02 to M33 |
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 317/317L Bolts are essential in highly corrosive environments, especially where exposure to chlorides, sulfides, and acidic media is prevalent. In the chemical and petrochemical industries, they find applications in reactors, evaporators, and acid-handling systems. The pulp and paper industry relies on them for bleaching and digesting equipment. Marine and offshore structures utilize these bolts for their outstanding resistance to seawater corrosion. Additionally, food and pharmaceutical equipment benefit from their hygienic finish and corrosion resistance. Their durability, strength, and chemical stability make them the perfect choice for critical and aggressive service conditions.
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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