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The Fasteners Mart, with its base in Mumbai, India, is a reliable producer and international distributor of high-grade industrial fasteners, providing unequalled precision, strength, and durability. Included in our extensive product line are Stainless Steel 321 / 321H Fasteners, made from titanium-stabilized austenitic stainless steel. The fasteners are produced in numerous shapes, such as bolts, nuts, screws, washers, and studs. Grade 321 is best suited for applications at high temperatures, whereas 321H is better in creep resistance because it contains more carbon—thus they are ideal for thermal processing, chemical, and petrochemical applications.
Stainless Steel 321 / 321H Fasteners are mainly made up of chromium (17–19%), nickel (9–13%), and titanium (≥5xC%) along with added carbon (0.08% in 321, up to 0.10% in 321H), manganese, silicon, and iron. They possess tensile strength of 515–750 MPa and yield strength of approximately 205 MPa. The density of these fasteners is 7.93 g/cm³, and the melting point is 1398–1510°C. Stainless Steel 321 / 321H Fasteners possess superior resistance to oxidation as well as intergranular corrosion, particularly at high-temperature conditions and welding environments.
| Standard | ASTM A193,A194 / ASME SA193,SA194 |
| Standard | DIN, ASTM, BS and all International Standards |
| Length | 3 mm to 200 mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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.
321 / 321H Stainless Steel Fasteners are commonly applied in heat exchangers, thermal oxidizers, expansion joints, refinery equipment, and high-temperature chemical processing equipment. Grade 321 is ideally suited for use in conditions of continuous high-temperature exposure, whereas 321H is suitable for use in applications that require sustained high pressures and creep strength. Their resistance to scaling and corrosion renders them suitable for use in exhaust systems, furnace parts, and aerospace assemblies, where reliability and heat resistance are of utmost importance.
The Fasteners Mart is providing timely and guaranteed delivery of Stainless Steel 321 / 321H Fasteners to domestic and global markets. Products are properly packed in moisture-proof wrapping, bubble padding, and strong cartons or wooden boxes. Proper labeling confirms product identification, and careful transit ensures secure, damage-free transport.
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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