SS 321/321H Washers, SS 321/321H Flat Washers, Stainless Steel Washers & SS 321/321H Washer Manufacturer and Supplier in Mumbai, India
Unifit Metal Alloys is a manufacturer, supplier, stockist and exporter of SS 321/321H Washers in Mumbai, India, supplying stainless steel washers for industrial machinery, fabrication, construction, process equipment and engineering applications. These washers are fitted with nuts and bolt heads to distribute the fastening load over the contact area, helping protect the connected surface and maintain a stable and secure bolted joint.
SS 321/321H Washers are manufactured from titanium-stabilized austenitic stainless steel and are selected for applications involving elevated temperatures and corrosive operating conditions. The titanium stabilization helps reduce the effects of carbide precipitation during prolonged exposure to heat, supporting resistance to intergranular corrosion. Grade 321 is suitable for general high-temperature applications, while 321H offers enhanced high-temperature strength for more demanding service conditions.
SS 321/321H Washers, SS 321/321H Flat Washers, Stainless Steel Washers & SS 321/321H Washer Manufacturer and Supplier in Mumbai, India
These washers are commonly used in heat exchangers, chemical-processing equipment, thermal processing systems, power plants, petrochemical facilities, exhaust systems, high-temperature piping and industrial machinery. Their combination of corrosion resistance and temperature capability makes them suitable for fastening assemblies exposed to heat and demanding industrial environments.
SS 321/321H Washers are available in different inside diameters, outside diameters, thicknesses and configurations to meet various fastening requirements. Unifit Metal Alloys can supply standard and customized washer dimensions for fabrication, maintenance, equipment installation and specialized industrial projects.
Get the Best Quote for SS 321/321H Washers. We Stock SS 321/321H Washers in Various Diameters, Sizes, Specifications and Surface Finishes. Contact Us Today for a Competitive Quote.
SS 321/321H Washer Specification
| Material | Stainless Steel 321 / 321H |
|---|---|
| Grade | SS 321 / SS 321H |
| Standard | ASTM A240 / ASME SA240 |
| Equivalent Grade | UNS S32100 / UNS S32109 |
| Product Type | Flat Washers, Plain Washers, Heavy Washers, Fender Washers and Custom Washers |
| Size Range | M3 to M100 | 1/8″ to 4″ | Custom Sizes Available |
| Thickness | 0.5 mm to 20 mm | Custom Thickness Available |
| Manufacturing Process | Cold Rolled, Stamped, Pressed, Laser Cut or Machined |
| Heat Treatment | Solution Annealed |
| Thread Compatibility | Metric, UNC, UNF, BSF, BSW and Custom Threads |
| Finish | Plain, Pickled, Passivated, Polished and Custom Finishes |
| Corrosion Resistance | Excellent Resistance to General Corrosion, Oxidation and Intergranular Corrosion |
| Temperature Resistance | Excellent High-Temperature Resistance and Suitable for Elevated-Temperature Applications |
| Application | Heat Exchangers, Chemical Processing, Petrochemical, Oil & Gas, Power Generation, Aerospace, High-Temperature Equipment and General Engineering |
Chemical Composition for SS 321/321H Washer
| Element | SS 321 (%) | SS 321H (%) |
|---|---|---|
| Carbon (C) | 0.08 max. | 0.04 – 0.10 |
| Manganese (Mn) | 2.00 max. | 2.00 max. |
| Silicon (Si) | 0.75 max. | 0.75 max. |
| Phosphorus (P) | 0.045 max. | 0.045 max. |
| Sulfur (S) | 0.030 max. | 0.030 max. |
| Chromium (Cr) | 17.00 – 19.00 | 17.00 – 19.00 |
| Nickel (Ni) | 9.00 – 12.00 | 9.00 – 12.00 |
| Titanium (Ti) | 5 × (C + N) min. – 0.70 max. | 4 × (C + N) min. – 0.70 max. |
| Nitrogen (N) | 0.10 max. | 0.10 max. |
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Equivalent Grades of SS 321/321H Washer
| Standard | SS 321 | SS 321H |
|---|---|---|
| UNS (USA) | S32100 | S32109 |
| WNR (Europe) | 1.4541 | 1.4878 |
| JIS (Japan) | SUS 321 | SUS 321H |
| BS (United Kingdom) | 321S31 | 321S51 |
| EN / DIN (Germany) | X6CrNiTi18-10 / X10CrNiTi18-9 | X6CrNiTi18-10 / X10CrNiTi18-9 |
| AFNOR (France) | Z6CNT18-10 | Z6CNT18-10 |
| GOST (Russia) | 08KH18N10T | 12KH18N10T |
Ready Stock of SS 321/321H Washer
SS 321/321H Washer Application Industries
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