Why Galling-Prone Industries Trust Ganpat Industrial For Nitronic 60 Washers?
Twice the Yield of 304/316
7-9% Mn & 3.5-4.5% Si heats – mill-certified every batch
Galling & Wear Resistant
Where 304/316 seize under load, Nitronic 60 keeps running
One Enquiry, Full Range
Flat • Lock • Spring • Sealing – all in one PO
Zero Inspection Surprises
PMI • hardness • dimensional – verified before it ships
Quote In 24 Hours
Ready stock on standard sizes – ships same week
Nitronic 60 Washers Key Facts
- 1Type: Flat, Lock, Spring, Sealing, Conical, Star, Square, Machine, Split, Ogee
- 2Size Range: M3 to M48 • OD 7 mm to 92 mm
- 3Common Grades: UNS S21800, Alloy 218, ASTM B194 Alloy 218
- 4Standards: ASME SB194 Alloy 218, ASME B18.22.1, ASTM A193 Gr. B8S, ISO 7089
- 5Origin: Indian origin • European origin • USA origin
- 6Finish: Bright Annealed, Passivated, Machined, Natural Mill Finish
Or call our Mumbai office: +91 22 6743 7134 • Fast dispatch on ready stock sizes
Nitronic 60 Washers, also known as Alloy 218 Washers, offer excellent durability. They feature silicon-manganese, nitrogen-strengthened austenitic construction for demanding applications. These washers resist galling and seizure during repeated torque or vibration. They outperform 304 and 316 washers that score, wear, and lock. Ganpat Industrial machines every UNS S21800 Washer entirely in-house. We ship tested, documented stock to fastener buyers across India. They also supply valve, pump, and marine hardware buyers. Their products serve customers across the UAE and Middle East.
Mumbai · Nitronic 60 Washers Manufacturer India
ASTM B194 Alloy 218 Sealing Washer Resist Galling Under High Torque
Ganpat Industrial machines and supplies Alloy 218 Washers for buyers who cannot risk thread galling, fretting or wear – valve stems, pump shafts, high-torque fastening systems and non-magnetic hardware across India, the UAE and the Middle East.
- ✓Galling & Seizure Resistant
- ✓Custom Sizes Available
- ✓Precision Machined Washers
- ✓Material Test Certificates
Alloy 218 Flat Spring Washers Manufacturer in India Offering Complete Specifications
Nitronic 60 Washers Specification
Leading Nitronic 60 Washers Supplier in India, with complete specifications provided for every enquiry.
Alloy 218 Split Washers Material
- UNS S21800
- Alloy 218
- 218 Alloy
- ASTM B194 Alloy 218
Nitronic 60 Tooth Washers Size Range
- ID: M3 – M48
- OD: 7 – 92 mm
- Thickness: 0.5 – 8 mm
- Custom sizes on drawing
ASTM B194 Alloy 218 Ogee Washer Testing
- PMI Testing
- Hardness Check (HRB)
- Dimensional Check
- Third-Party Inspection
218 Alloy Slot Washer Finish
- Bright Annealed
- Passivated (ASTM A967)
- Precision Machined
- Natural Mill Finish
ASME SB194 Alloy 218 Square Washer Documentation
- Mill Test Certificate 3.1
- NABL Lab Report
- Packing List
- Certificate Of Origin
UNS S21800 Alloy 218 Flat Washer Origin
- Indian Origin
- European Origin
- USA Origin
- Heat-Number Traceable
Find ISO Certified UNS S21800 Alloy 218 Star Washers With Precise Dimensions And Reliable Quality
UNS S21800 Alloy 218 Star Washers Dimensions Chart
Find precise dimensions for Alloy 218 Washers across various standard sizes.
| Bolt Size | Inner Dia. d1 (mm) | Outer Dia. d2 (mm) | Thickness h (mm) |
|---|---|---|---|
| M3 | 3.2 | 7 | 0.5 |
| M4 | 4.3 | 9 | 0.8 |
| M5 | 5.3 | 10 | 1.0 |
| M6 | 6.4 | 12 | 1.6 |
| M8 | 8.4 | 16 | 1.6 |
| M10 | 10.5 | 20 | 2.0 |
| M12 | 13.0 | 24 | 2.5 |
| M14 | 15.0 | 28 | 2.5 |
| M16 | 17.0 | 30 | 3.0 |
| M18 | 19.0 | 34 | 3.0 |
| M20 | 21.0 | 37 | 3.0 |
Common Types of Nitronic 60 Washers
Nitronic 60 Flat Washer
ISO 7089
Alloy 218 Star Washer
DIN 6797
UNS S21800 Alloy 218 Conical Washer
DIN 6796
ASTM B194 Alloy 218 Lock Washer
DIN 127
Nitronic 60 Square Washer
Bonded Seal
ASME SB194 Alloy 218 Tab Washers
DIN 93
218 Alloy Tooth Washer
DIN 6798
Alloy 218 DIN 1.4547 Countersunk Washer
DIN 6917
Need Mill-Certified Alloy 218 Washers on Short Notice?Share size & quantity – get factory price with MTC 3.1 in 24 hours.
Manufacturing Process of Alloy 218 DIN 1.4547 Ogee Washer
Raw Material & MTC Check
Incoming UNS S21800 bar verified against Mill Test Certificate 3.1
Blanking To Size
Bar or plate blanked into rough washer discs on power press
Precision Piercing
ID hole machined to tolerance – slower feeds as N60 work-hardens fast
Deburring & Edge Finish
Edges rounded for smooth, non-galling bolt seating
Passivation (ASTM A967)
Acid-passivated to restore the chromium oxide surface film
Inspection & Packing
PMI, hardness & dimensional check, then export-ready packing
Weight Chart of ASME SB194 Alloy 218 Flat Washer
Calculated at 7.90 g/cm³ density on standard ISO 7089 flat washer, weight in grams
| Size | Weight (g) |
|---|---|
| M2 | 0.037 |
| M2.5 | 0.087 |
| M12 | 6.19 |
| M1.6 | 0.024 |
| M2.3 | 0.091 |
| M3 | 0.118 |
| M2.6 | 0.125 |
| M4 | 0.304 |
| M3.5 | 0.153 |
| M6 | 1.01 |
| M5 | 0.437 |
| M8 | 1.81 |
| M1.7 | 0.031 |
| M10 | 3.53 |
| M14 | 8.51 |
| M20 | 17.0 |
| M7 | 1.37 |
| M18 | 14.5 |
| M24 | 31.9 |
| M22 | 18.1 |
| M27 | 41.8 |
| M26 | 43.2 |
| M30 | 52.9 |
| M28 | 40.4 |
| M16 | 11.2 |
Welding Methods of ASTM B194 Alloy 218 Slot Washer
GMAW
Gas Metal Arc Welding
Suitable for efficient production welding applications
PAW
Plasma Arc Welding
Provides controlled, precise welding performance
SMAW
Shielded Metal Arc Welding
Suitable for versatile fabrication requirements
GTAW
Gas Tungsten Arc Welding
Offers precise control for quality welds
Monthly Delivery of Alloy 218 Washers To The Following Countries
| Export to | Continent | Shipping time |
|---|---|---|
 Mexico |
North America | 45 Days |
 South Africa |
Africa | 25-30 Days |
 Kenya |
Africa | 19 Days |
 Oman |
Asia | 5 Days |
Looking for ASME SB194 Alloy 218 Spherical Washers At Best Price?Get competitive factory pricing with fast delivery and dependable quality.
Applications of Nitronic 60 Machine Washer
We are a reliable Nitronic 60 Washers Supplier In India for wear, galling & high-torque duty
Valve Stems, Seats & Trim
Pump Shafts & Sleeves
Bushings & Roller Bearings
High-Torque Fastening Systems
Marine & Offshore Hardware
Chemical & Petrochemical Piping
Non-Magnetic Instrumentation Parts
Wear Plates & Rail Guides
218 Alloy Tooth Washer Pressure Rating
Pressure ratings vary according to washer dimensions and application requirements.
| Bolt Size mm | d2 H14 mm | d1 H14 mm | h max mm | s3 mm | Flattening Force N | Residual Spring Force N |
|---|---|---|---|---|---|---|
| 4 | 9 | 4.3 | 1.30 | 1.0 | 4050 | 1400 |
| 5 | 11 | 5.3 | 1.55 | 1.2 | 6700 | 2300 |
| 6 | 14 | 6.4 | 2.00 | 1.5 | 9400 | 4200 |
| 8 | 18 | 8.4 | 2.60 | 2.0 | 17200 | 7700 |
| 10 | 23 | 10.5 | 3.20 | 2.5 | 27500 | 12400 |
| 12 | 29 | 13 | 3.95 | 3.0 | 40000 | 18000 |
| 14 | 35 | 15 | 4.65 | 3.5 | 55000 | 25000 |
| 16 | 39 | 17 | 5.25 | 4.0 | 75000 | 34000 |
| 18 | 42 | 19 | 5.80 | 4.5 | 95000 | 57000 |
| 20 | 45 | 21 | 6.40 | 5.0 | 122000 | 73000 |
| 22 | 49 | 23 | 7.05 | 5.5 | 152000 | 91000 |
| 24 | 56 | 25 | 7.75 | 6.0 | 175000 | 122000 |
| 27 | 60 | 28 | 8.35 | 6.5 | 230000 | 161000 |
| 30 | 70 | 31 | 9.20 | 7.0 | 280000 | 196000 |
Material Equivalent of UNS S21800 Alloy 218 Conical Washer
American Standard
- UNS S21800
- ASTM B194 Alloy 218
- ASME SB194 Alloy 218
- AMS 5764 / AMS 5765
European Standard
- Alloy 218
- Werkstoff Nr. 1.3964
- EN 10088 Nitrogen-Alloyed Austenitic
Indian & Global Sourcing
- ASTM A193 Grade B8S (Fastener Form)
- ASME B18.22.1 (Washer Dimension)
- 218 Alloy – Common Trade Name
Chemical Composition of Nitronic 60 Lock Washers
Trusted Nitronic 60 Washers Manufacturer In India maintaining precise chemical composition for every heat
ChromiumCr
16.00–18.00%
ManganeseMn
7.00–9.00%
NickelNi
8.00–9.00%
SiliconSi
3.50–4.50%
NitrogenN
0.08–0.18%
MolybdenumMo
≤ 0.75%
CarbonC
≤ 0.10%
IronFe
Balance
Mechanical Properties of ASME SB194 Alloy 218 Tab Washers
Tensile Strength
655 MPa Min
UNS S21800 Bar
Yield Strength
345 MPa Min
0.2% Proof Stress
Hardness
≤ 241 HB
Solution Annealed
Elongation
35% Min
In 50 mm Gauge
Planning Bulk Requirements for High-Torque or Marine Applications?Send your BOQ for factory pricing, certification, and quick dispatch.
Weekly Delivery of Nitronic 60 Countersunk Washer in Below Countries
| Export to | Shipping time | Continent |
|---|---|---|
 USA |
40-60 Days | North America |
 UAE |
5 Days | Asia |
 Italy |
30 Days | Europe |
 Saudi Arabia |
7 Days | Asia |
Testing Methods of ASTM B194 Alloy 218 Sealing Washer
PMI Testing
Positive Material Identification on every heat
Hardness & Galling Check
HRB / HB verification against B8S limits
Dimensional & Visual
OD, ID, thickness & surface checked per lot
Frequently Asked Questions
Are UNS S21800 Alloy 218 Star Washers magnetic?
They are essentially non-magnetic in the annealed condition.
What makes Nitronic 60 Tab Washers different from SS 316?
Nitronic 60 offers superior galling and wear resistance, with twice the yield strength of SS 316.
Can Alloy 218 Washers be reused after removal?
Yes – its non-galling surface allows repeated assembly without thread damage.
Sales Representatives Across Various Continents
| Continents | Country |
|---|---|
| Asia | India, Japan, South Korea, Indonesia, Saudi Arabia, Iran |
| Africa | Nigeria, Egypt, South Africa, Kenya, Ghana, Ethiopia |
| North America | United States, Canada, Mexico, Cuba |
| South America | Brazil, Argentina, Colombia, Chile, Peru |
| Europe | Germany, France, UK, Italy, Spain, Poland, Ukraine |
| Australia | New Zealand, Papua New Guinea, Fiji, Samoa |
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