Need Extreme-Heat Washers? Why Industry Leaders Pick Ganpat Industrial Stainless Steel 446 Washers.
Highest Chromium Of Any Common Grade
23–27% Cr resists scaling where lesser grades flake and fail
Rated Past 1200°C
Holds shape in kilns, furnaces and incinerators where 300-series grades scale
Every Profile, One Dispatch
Lock, sealing, spring & countersunk types packed on a single invoice
Heat-Batch Traceable
UNS S44600 heats recorded and matched to every consignment
Ready Stock, Fast Turnaround
Standard sizes boxed and export-ready this week
Stainless Steel 446 Washer Highlights
- 1Standards: ASME B18.22.1, DIN 125, DIN 127, DIN 6796, ISO 7089/7090
- 2Common Grades: UNS S44600, EN 1.4762, AISI 446, Werkstoff Nr. 1.4762
- 3Finish: Bright Annealed, Passivated, Polished, Natural Mill Finish
- 4Origin: Indian origin • Japanese origin • European origin
- 5Size Range: M2 to M36 • OD 5 mm to 66 mm • per ASTM A240
- 6Type: Plain, Spring, Sealing, Flat, Lock, Square, Star, Countersunk
Or call our Mumbai office: +91 22 6743 7134 • Same-week dispatch on ready stock sizes
Ganpat Industrial manufactures premium heat-resistant fasteners for severe thermal applications. We supply corrosion-resistant UNS S44600 Washers and European-standard EN 1.4762 Washers for high-heat environments. Every batch of our ASTM A176 446 Washers and AISI 446 Washers is built for kilns, furnace linings, and incinerator ductwork that operate in continuous extreme temperatures.
Mumbai · Forging Manufacturer & Exporter
Stainless Steel 446 Washers Built To Survive The Hottest Zones In Your Plant
Ganpat Industrial manufactures and exports Stainless Steel 446 Washers for buyers whose equipment runs hotter than standard fasteners can handle – furnace linings, kiln fixtures, thermocouple wells and incinerator ductwork across India, the Gulf, Africa and Southeast Asia.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
Trusted ASTM A276 Conical Supplied Directly from India Offering Verified Specification
Specification Of Stainless Steel 446 Washers
SS 446 Fender Washers Size Range
- ID: M2 – M36
- OD: 5 – 66 mm
- Thickness: 0.3 – 5 mm
- Custom sizes on drawing
UNS S44600 Lock Washers Standards
- ASME B18.22.1
- DIN 125 / DIN 127
- ISO 7089 / 7090 / 7091
- ISO 3506 (C4-70)
EN 1.4762 Sealing Washers Production Route
- Precision Blanking
- CNC Punching
- Cold Forming (Spring/Star)
- Deburring & Tumbling
ASTM A176 446 Flat Washers Surface Finish
- Bright Annealed
- Passivated (ASTM A967)
- Ground & Polished
- Natural / Mill Finish
AISI 446 Spring Washers Material Grade
- UNS S44600
- EN 1.4762
- AISI 446
- ASTM A176 / A240
SUS 446 Split Washers High-Chromium Ferritic Structure
- Chromium: 23.00–27.00%
- No Nickel Required
- Magnetic In All Conditions
- Stable Up To 1200°C
INOX 446 Lock Washers Testing Method
- PMI Testing
- High-Temperature Soak Test
- Dimensional Check
- Third-Party Inspection
SS 1.4762 Countersunk Washers Documentation
- Mill Test Certificate 3.1
- NABL Lab Report
- Packing List
- Certificate Of Origin
Stainless Steel S44600 Star Washers Origin
- Indian Origin
- Japanese Origin
- European Origin
- Traceable To Heat Number
Types Of SS 446 Washers
SS 446 Plain Washers
ASME B18.22.1
UNS S44600 Lock Washers
Twisted Tooth
EN 1.4762 Sealing Washers
Bonded Seal
ASTM A176 446 Flat Washers
ISO 7089
AISI 446 Spring Washers
DIN 127
SUS 446 Square Washers
DIN 436
SS 1.4762 Star Washers
Internal Tooth
INOX 446 Countersunk Washers
UNS S44600
Need A Custom SS 446 Washer Size Or Type?Share your drawing – get a factory-price quote within 24 hours.
Reliable SS 446 Plain and Square Washers Kept Ready in Ex Stock with Verified Sizes and PMI Tested Certification at Best Price
UNS S44600 Fender Washers Size Chart
| Screw Size | Inner Ø (d1 min) | Outer Ø (d2 max) | Thickness (s) |
|---|---|---|---|
| M16 | 17.0 | 30 | 3.0 |
| M20 | 21.0 | 37 | 3.0 |
| M24 | 25.0 | 44 | 4.0 |
| M4 | 4.3 | 9 | 0.8 |
| M5 | 5.3 | 10 | 1.0 |
| M10 | 10.5 | 20 | 2.0 |
| M12 | 13.0 | 24 | 2.5 |
| M6 | 6.4 | 12 | 1.6 |
| M8 | 8.4 | 16 | 1.6 |
Specifying For A Furnace Or Kiln Project?Send your BOQ – factory price, MTC 3.1, dispatch same week.
EN 1.4762 Spring Washers Chemical Composition
ChromiumCr
23.00–27.00%
CarbonC
≤ 0.20%
ManganeseMn
≤ 1.50%
SiliconSi
≤ 1.00%
NitrogenN
≤ 0.25%
PhosphorusP
≤ 0.040%
SulphurS
≤ 0.030%
IronFe
Balance
Weekly Delivery Of Stainless Steel 446 Washers In Below Countries
| Export To | Continent | Port | Shipping Time |
|---|---|---|---|
| Singapore | Asia | Port Klang | 7-14 Days |
| Germany | Europe | Port of Rotterdam | 12 Days |
| Malaysia | Asia | Port of Singapore | 15-50 Days |
Stainless Steel 446 Washers Monthly Delivery In Below Countries
| Export To | Continent | Port | Shipping Time |
|---|---|---|---|
| USA | North America | Port of Los Angeles | 33-47 Days |
| Brazil | South America | Port of Itaqui | 25-39 Days |
| UAE | Asia | Port of Shanghai | 20-25 Days |
Buying In Bulk For A High-Temperature Line?Send your BOQ – factory price, MTC 3.1, dispatch same week.
SS 446 Washers Vs SS 310 Washers
SS 310 Washers
- Structure: Austenitic
- Nickel Content: 19.00–22.00%
- Max Continuous Temp: ≈ 1150°C
SS 446 Washers
- Structure: Ferritic
- Nickel Content: Not Required (0%)
- Max Continuous Temp: ≈ 1200°C
Need The Highest Oxidation Resistance Available?446 outlasts 310 in continuous scaling conditions.
ASTM A176 446 Lock Washers Mechanical Properties
Leading Stainless Steel 446 Washers Manufacturer in India producing high-hardness washers
Tensile Strength
≥ 483 MPa
Load Bearing
Yield Strength (0.2%)
≥ 275 MPa
Design Limit
Elongation (50mm)
≥ 20%
Ductility
Hardness
≤ 223 HB / 96 HRB
Wear Resistance
Get A Live SS 446 Washer Quote TodayFactory price, ready stock on standard sizes, and no minimum order penalty on repeat buyers.
AISI 446 Split Washers Heat Resistance Rating
SS 304Max °C
≈ 870°C
SS 321Max °C
≈ 800°C
SS 310Max °C
≈ 1150°C
SS 446Max °C
≈ 1200°C
SUS 446 Flat Washers Material Testing
PMI Testing
Confirms chromium content on every production lot
High-Temperature Soak Test
Verifies scaling resistance after simulated continuous heat
Dimensional Check
OD, ID & thickness verified against drawing tolerance
Visual & Surface Check
Screened for burrs, scale & finish defects before packing
Hardness Test
Confirms annealed condition sits within ASTM A240 limits
Third-Party Inspection
TPI call arranged with SGS/BV/TUV on large export orders
Comparing Grades For A Scaling Environment?Share your operating temperature – we recommend the right grade.
SS 147 Countersunk Washers Weight Chart
Check our Stainless Steel 446 Washers Supplier in India weight chart to select exact dimensions
| Screw Size | Weight / Pc (g) | Approx Pcs / Kg |
|---|---|---|
| M8 | 1.86 | ~538 |
| M10 | 3.64 | ~275 |
| M4 | 0.31 | ~3226 |
| M5 | 0.45 | ~2222 |
| M12 | 6.39 | ~156 |
| M16 | 11.52 | ~87 |
| M20 | 17.49 | ~57 |
| M6 | 1.04 | ~962 |
Stainless Steel 446 Sealing Washers HSN Code
HSN Heading
7318
Screws, bolts, nuts & washers of iron/steel
Plain / Flat Washer
7318 22 00
Non-threaded: other washers
Spring / Star Washer
7318 21 00
Non-threaded: spring & lock washers
GST Rate
18%
Standard rate on stainless steel washers
UNS S44600 Slot Washers Equivalent Grades
ASTM / ASME
- A176 / A276
- A240 / SA240
- A473
EN / DIN
- EN 10088-3
- 1.4762
- X10CrAl24
BS
- BS 1449
- 446S23 / 446S24
- BS EN 10088
JIS
- SUS 446
- JIS G4303
- JIS G3446
IS
- IS 6911
- Grade UNS S44600
- IS 1570 (Part 5)
GB
- GB/T 20878
- 10Cr17
- GB/T 3280
SS 446 Plain Washers Certification
NABL Lab Report
Every Stainless Steel 446 Washer dispatch travels with an NABL Lab Report, matched to the original heat number and cross-checked against ASTM A176/A240 chemistry and mechanical limits before it leaves our Mumbai facility.
INOX 446 Lock Washers Packaging
Premier Stainless Steel 446 Washers Supplier in India delivering in seaworthy wooden crates
Poly Bag & Carton
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 ports
Custom Labelling
PO number, size & heat number marked per buyer requirement
Application Of Stainless Steel 446 Star Washers
Furnace & Kiln Component Fastening
Heat Exchanger & Recuperator Assemblies
Thermocouple Protection Tube Fittings
High-Temperature Combustion Equipment
Annealing & Heat-Treatment Furnace Fixtures
Sulfur-Bearing Atmosphere Processing Equipment
Incinerator & Waste-Heat Boiler Parts
Industrial Oven & Dryer Assemblies
Frequently Asked Questions
Is SS 446 Washer magnetic?
SS 446 is a ferritic grade that remains magnetic in all conditions, making a simple magnet test an easy way to distinguish it from non-magnetic 300-series stock.
What makes SS 446 Washer suited to extreme heat?
Its 23–27% chromium content resists scaling in continuous service up to 1200°C, the highest of any common stainless grade.
What makes SS 446 Washer different from SS 304 Washer?
Nickel-free Grade 446 is magnetic and handles extreme heat, while 304 is non-magnetic and made for general corrosion.
Our Diverse Client Base In The Following Nations
| Morocco | Kenya | Gabon | Houston | Dubai | Tunisia |
| Saudi Arabia | Riyadh | Dammam | Al-khobar | UAE | Al Jubail |
| Angola | Ethiopia | Egypt | Zambia | Ghana | Tanzania |
| Abu Dhabi | South Africa | Nigeria | Mozambique | USA | Oman |
| New South Wales | Indiana | Texas | California | Algeria | Carolina |
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