Why Do Buyers Worldwide Rely on Ganpat Industrial for Certified Stainless Steel 321 Washers ?
Titanium Stabilised Grade
Locks carbon as TiC, stops intergranular attack near welds
Built For Heat, Not Just Corrosion
Rated for continuous service up to 800°C
Every Profile On One Invoice
Plain, spring, conical & sealing types – single dispatch
Heat-Number Traceable
UNS S32100 raw material backed by mill records
Ready-To-Ship Inventory
Standard sizes boxed and export-ready this week
Stainless Steel 321 Washer Overview
- 1Size Range: M2 to M36 • OD 5 mm to 66 mm • per ASTM A240
- 2Standards: ASME B18.22.1, DIN 125, DIN 127, DIN 6796, ISO 7089/7090
- 3Origin: Indian origin • Japanese origin • European origin
- 4Type: Plain, Spring, Fender, Sealing, Flat, Lock, Conical, Star, Countersunk
- 5Common Grades: UNS S32100, EN 1.4541, AISI 321, Werkstoff Nr. 1.4541
- 6Finish: Bright Annealed, Passivated, Polished, Natural Mill Finish
Or call our Mumbai office: +91 22 6743 7134 • Same-week dispatch on ready stock sizes
Ganpat Industrial forges UNS S32100 Washer and EN 1.4541 Washer components engineered to hold their grip and corrosion resistance well past the point where standard austenitic grades start to sensitise. Every Stainless Steel 321 Washer we dispatch is titanium-stabilised at the melt stage, so buyers running furnaces, exhaust lines and thermal-cycling equipment get a fastener that doesn’t lose integrity after repeated heat exposure.
Mumbai · Forging Manufacturer & Exporter
Stainless Steel 321 Washers Built To Survive Heat Cycles, Not Just Moisture
Ganpat Industrial manufactures and exports Stainless Steel 321 Washers for buyers whose components see repeated heating and cooling – exhaust assemblies, furnace linings, boiler supports and aerospace brackets across India, the Gulf and Southeast Asia.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
Reliable UNS S31703 Conical Washers Now Available with Complete Weight Chart Data and Reliable Specification for Bulk Orders
Specification Of Stainless Steel 321 Washers
INOX 321 Flat Washers Size Range
- ID: M2 – M36
- OD: 5 – 66 mm
- Thickness: 0.3 – 5 mm
- Custom sizes on drawing
UNS S32100 Spring Washers Standards
- ASME B18.22.1
- DIN 125 / DIN 127
- ISO 7089 / 7090 / 7091
- ISO 3506 (A4-70)
SUS 321 Plain Washers Production Route
- Precision Blanking
- CNC Punching
- Cold Forming (Spring/Conical)
- Deburring & Tumbling
AISI 321 Lock Washers Surface Finish
- Bright Annealed
- Passivated (ASTM A967)
- Polished
- Natural / Mill Finish
EN 1.4541 Fender Washers Material Grade
- UNS S32100
- EN 1.4541
- AISI 321
- ASTM A240
SS 321 Square Washers Titanium Stabilisation
- Ti: 5x(C+N) min – 0.70% max
- Prevents chromium carbide loss
- Weld-zone corrosion protection
- Stable up to 800°C
DIN X6CrNiTi18-10 Conical Washers Testing
- PMI Testing
- High-Temperature Soak Test
- Dimensional Check
- Third-Party Inspection
ASME SA240 321 Sealing Washers Documentation
- Mill Test Certificate 3.1
- NABL Lab Report
- Packing List
- Certificate Of Origin
Stainless Steel 321 Flat Washers Origin
- Indian Origin
- Japanese Origin
- European Origin
- Traceable To Heat Number
Stainless Steel 321 Lock Washers Weight Chart
| Screw Size | Weight / Pc (g) | Approx Pcs / Kg |
|---|---|---|
| M4 | 0.31 | ~3226 |
| M8 | 1.86 | ~538 |
| M10 | 3.64 | ~275 |
| M5 | 0.45 | ~2222 |
| M6 | 1.04 | ~962 |
| M12 | 6.39 | ~156 |
| M16 | 11.52 | ~87 |
| M20 | 17.49 | ~57 |
Get A Live SS 321 Washer Quote TodayFactory price, ready stock on standard sizes, and no minimum order penalty on repeat buyers.
Rely on EN 1.4438 Spring Washer Backed by Verified Size Chart and PMI Tested Certification with Direct Stockist Support
AISI 321 Lock Washers Size Chart
| Screw Size | Inner Ø (d1 min) | Outer Ø (d2 max) | Thickness (s) |
|---|---|---|---|
| M4 | 4.3 | 9 | 0.8 |
| M5 | 5.3 | 10 | 1.0 |
| M8 | 8.4 | 16 | 1.6 |
| M10 | 10.5 | 20 | 2.0 |
| M6 | 6.4 | 12 | 1.6 |
| M12 | 13.0 | 24 | 2.5 |
| M16 | 17.0 | 30 | 3.0 |
| M20 | 21.0 | 37 | 3.0 |
| M24 | 25.0 | 44 | 4.0 |
EN 1.4541 Fender Washer Vs SS 304 Washer
SS 304 Washers
- Titanium Stabilisation: None
- Max Continuous Temp: ≈ 450°C
- Weld-Zone Risk: Sensitisation Above 450°C
- Fits general indoor & food-grade jobs
SS 321 Washers
- Titanium Stabilisation: Yes
- Max Continuous Temp: ≈ 800°C
- Weld-Zone Risk: Resists Carbide Precipitation
- Built for exhaust, furnace & thermal-cycling duty
Specifying For A High-Temperature Project?Send your BOQ – factory price, MTC 3.1, dispatch same week.
DIN X6CrNiTi18-10 Countersunk Washers Chemical Composition
Trusted Stainless Steel 321 Washers Supplier In India, backed by verifiable chemical composition
ChromiumCr
17.00–19.00%
NickelNi
9.00–12.00%
TitaniumTi
5x(C+N)–0.70%
ManganeseMn
≤ 2.00%
SiliconSi
≤ 0.75%
CarbonC
≤ 0.08%
PhosphorusP
≤ 0.045%
SulphurS
≤ 0.030%
NitrogenN
≤ 0.10%
IronFe
Balance
ASME SA240 Spring Washers Mechanical Properties
Tensile Strength
≥ 515 MPa
Load Bearing
Yield Strength (0.2%)
≥ 205 MPa
Design Limit
Elongation (50mm)
≥ 40%
Ductility
Hardness
≤ 217 HB / 95 HRB
Wear Resistance
Buying In Bulk For A Furnace Or Exhaust Line?Send your BOQ – factory price, MTC 3.1, dispatch same week.
INOX 321 Split Washers HSN Code
HSN Heading
7318
Screws, bolts, nuts & washers of iron/steel
Plain / Flat Washer
7318 22 00
Non-threaded: other washers
Spring / Conical Washer
7318 21 00
Non-threaded: spring & lock washers
GST Rate
18%
Standard rate on stainless steel washers
Types Of SS 321 Washers
SS 321 Plain Washers
ASME B18.22.1
UNS S32100 Spring Washers
DIN 127
AISI 321 Lock Washers
Twisted Tooth
EN 1.4541 Fender Washers
Wide OD
DIN X6CrNiTi18-10 Conical Washers
DIN 6796
ASME SA240 321 Sealing Washers
Bonded Seal
Stainless Steel 321 Flat Washers
ISO 7089
INOX 321 Countersunk Washers
UNS S32100
Need A Custom SS 321 Washer Size Or Type?Share your drawing – get a factory-price quote within 24 hours.
Weekly Delivery Of Stainless Steel 321 Washers
| Export To | Continent | Shipping Time |
|---|---|---|
| Saudi Arabia | Asia | 7 Days |
| Thailand | Asia | 7 Days |
| Indonesia | Asia | 9 Days |
| Philippines | Asia | 14 Days |
Monthly Delivery Of Stainless Steel 321 Washers
| Export To | Continent | Shipping Time |
|---|---|---|
| Philippines | Asia | 14 Days |
| Spain | Europe | 30 Days |
| Germany | Europe | 20 Days |
| Malaysia | Asia | 10 Days |
SUS 321 Sealing Washers Equivalent Grades
Established Stainless Steel 321 Washers Manufacturer in India offering every internationally recognised grade equivalent
ASTM / ASME
- A240 / SA240
- A276
- A182 F321
- A473
EN / DIN
- EN 10088-3
- 1.4541
- X6CrNiTi18-10
BS
- BS 1449
- 321S12 / 321S31
- BS EN 10088
JIS
- SUS 321
- JIS G4303
- JIS G3446
IS
- IS 6911
- Grade UNS S32100
- IS 1570 (Part 5)
GB
- GB/T 20878
- 06Cr18Ni11Ti
- GB/T 3280
Need Mill Test Certificates With Your Order?Every dispatch ships with EN 10204 3.1 documentation.
AISI 321 Star Washers Material Testing
PMI Testing
Positive Material Identification on every lot to confirm grade & titanium content
High-Temperature Soak Test
Verifies resistance to sensitisation after simulated heat cycling
Dimensional Check
OD, ID & thickness verified against drawing tolerance
Visual & Surface Check
Screened for burrs, scale & finish defects
Hardness Test
Confirms annealed condition meets ASTM A240 limits
Third-Party Inspection
TPI available on request for large export orders
EN 1.4541 Square Washers Certification
Mill Test Certificate 3.1
Every Stainless Steel 321 Washer dispatch travels with an EN 10204 3.1 Mill Test Certificate, matched to the original heat number and cross-checked against ASTM A240 chemistry and mechanical limits before it leaves our Mumbai facility.
UNS S32100 Flat Washers Packaging
Poly Bag & Carton
Standard retail-ready packing for small & trial orders
Wooden Pallet Box
For bulk quantities & container-load shipments
Export Vacuum Pack
Moisture-sealed for long-transit sea freight & humid climates
Custom Labelling
PO number, size & heat number marked per buyer requirement
Application Of Stainless Steel 321 Lock Washers
Leading Stainless Steel 321 Washers Supplier in India, engineered for heat-intensive industrial duty
Automotive Exhaust & Manifold Systems
Furnace & Heat-Treatment Equipment
Boiler & Superheater Supports
Aerospace & Aircraft Fittings
Expansion Bellows & Joints
Refinery Furnace & High-Temp Piping
Welded Fabrication & Pressure Vessels
Power Plant & Turbine Components
Frequently Asked Questions
What makes SS 321 Washer different from SS 304 Washer?
304 handles everyday indoor jobs fine, but 321’s titanium addition keeps it stable through repeated heating – the reason it’s picked for exhausts, furnaces and thermal-cycling parts.
What does titanium stabilisation actually do?
Titanium binds with carbon first, so chromium stays free to fight corrosion instead of forming carbides at the weld line – this keeps the washer protected even after welding or heat exposure.
Is SS 321 Washer magnetic?
No. In the annealed condition, a Stainless Steel 321 Washer is essentially non-magnetic due to its austenitic structure; slight magnetism can appear only after heavy cold working.
What is the minimum order quantity?
Ganpat Industrial supplies from small trial lots to full container loads – share your size and quantity for a factory-price quote.
Explore Nearby Locations For The Quickest Delivery Options
| Saudi Arabia | UAE | Oman | Nigeria | South Africa |
| USA | Algeria | Kenya | Angola | Tanzania |
| Ethiopia | Zambia | Ghana | Gabon | Morocco |
| New South Wales | Mozambique | Egypt | Tunisia |
6 Reasons to choose Ganpat Industrial Corporation
- Distributor of Heat Exchanger parts and Alloys for High Temperature applications.
- Stockholder and importer of Ferrous and non ferrous metals.
- Wide stock of prime quality austenitic and Ferritic Stainless Steel for Extreme pressure environment.
- Marine grade steel at lowest price in Mumbai.
- Compare Price per KG in India and China.
- Offer Resale price to local suppliers, traders and wholesalers in UAE, Saudi Arabia, Egypt, and USA