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The Fasteners Mart, Mumbai, India, is a well-known manufacturer and supplier of high-quality industrial fasteners, renowned for precision engineering and long-lasting performance. Our product line includes Stainless Steel 321 / 321H Washers, which are produced from titanium-stabilized austenitic stainless steel. These washers, offered in flat, spring, and custom shapes, are best suited for high-temperature and corrosive conditions. Grade 321 has good resistance to intergranular corrosion, whereas 321H has improved strength in high-temperature conditions, and they are used for rigorous industrial uses in the power generation, chemical, and aerospace industries.
Stainless Steel 321 / 321H Washers are made up of chromium (17–19%), nickel (9–13%), titanium (≥5xC%), and carbon (max 0.08% for 321, up to 0.10% for 321H). Other components consist of manganese, silicon, and traces of phosphorus and sulfur. These washers provide tensile strength ranging from 515–750 MPa and yield strength of about 205 MPa. The density of the material is 7.93 g/cm³, and the melting point is 1398–1510°C. They retain mechanical properties in high-temperature and thermal cycling applications.
| 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 | Wedge Lock Washers, Square Washer, Spring Lock Washer, Self Locking Washer, Sealing Washer, Plain Flat Washer, Ogee Washer, Industrial Washer, Hex Washer, Finishing Washer, Fender Washer, Conical Washer, Countersunk Washer, Square Beveled Washer, Curved Wave Washer, External Tooth Lock Washer, Internal Tooth Lock Washers, Internal Tab Washers, lock washer Fastener, Wedge Lock Washers, Tab Washer, Structural Washers. |
| Grade | AISI | Stainless Steel Bolts Chemical Composition (% maxima unless stated) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu | ||||||
| A1 | SS 202 | 0.12 | 1.0 | 6.5 | 0.20 | 0.15-0.35 | 16,0 – 19,0 | 0.7 | 5,0 – 10,0 | 1.75-2.25 | ||||
| A2 | SS 304 | 0.08 | 1.0 | 2.0 | 0.05 | 0.03 | 15,0 – 20,0 | 0.0 | 8,0 – 19,0 | 4.0 | ||||
| A3 | SS 321 | 0.08 | 1.0 | 2.0 | 0.05 | 0.03 | 17,0 – 19,0 | 0.0 | 9,0 – 12,0 | 1.0 | ||||
| A4 | SS 316 | 0.08 | 1.0 | 2.0 | 0.05 | 0.03 | 16,0 – 18,5 | 2,0 – 3,0 | 10,0 – 15,0 | 4.0 | ||||
| C1 | SS 410 | 0.09-0.15 | 1.0 | 1.0 | 0.05 | 0.03 | 11,5 – 14,0 | – | 1 | – | ||||
| C3 | SS 431 | 0.17-0.25 | 1.0 | 1.0 | 0.04 | 0.03 | 16,0 – 18,0 | – | 1,5 – 2,5 | – | ||||
| C4 | SS 416 | 0.08-0.15 | 1.0 | 1.5 | 0.06 | 0.15-0.35 | 12,0 – 14,0 | 0.6 | 1 | – | ||||
| F1 | SS 430 | 0.12 | 1.0 | 1.0 | 0.04 | 0.03 | 15,0 – 18,0 | 0.0 | 1 | – | ||||
| Stainless Steel Bolts | Class | Tensile Stress Rm MPa (N/mm2) minimum | Yield Strength Rp 0.2 Mpa (N/mm2) minimum | AL Minimum Elongation | Diameter |
|---|---|---|---|---|---|
| Stainless Steel Bolts | 70 | 700 | 450 | 0.4d | =<M20 |
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 Washers are used extensively in aerospace, oil & gas, chemical processing, and power generation industries. They are applicable in high-temperature conditions like heat exchangers, furnace equipment, exhaust manifolds, and pressure vessels. The washers ensure effective load distribution and resistance to vibration in bolted assemblies that are subjected to heat and corrosion. Grade 321 is best suited for welding uses, whereas 321H is applied where better resistance to creep is needed in order to ensure prolonged performance under stressful conditions.
The Fasteners Mart provides timely, safe delivery of Stainless Steel 321 / 321H Washers anywhere in the world. Products are wrapped in moisture-proof materials and bubble wrap before packing in durable cartons or wooden crates. Appropriate labeling and quality inspections ensure that products reach customers in the best possible condition, ready to use.
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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