Reliability by Design: Why Ganpat Industrial Leads the Inconel 718 Washers Market ?
Every Lot Proof-Load Checked
Hardness, PMI and dimensional sign-off recorded before a box is sealed
All Washer Styles On A Single PO
Flat, spring, sealing, Belleville and lock washers in one shipment
NACE MR0175 Sour-Service Traceable Heats
Every coil and bar carries a certified heat number back to the melt
Ready-Stock Sizes Ship Same Week
M3 to M64 washer blanks held in inventory for immediate offer
Blanking-To-Finish Under One Roof
No trading margin stacked between raw coil and the finished washer
Inconel 718 Washers Specifications
- 1Standards: ASME SB670, ASTM B637, ASME SA166, AMS 5662 / 5663
- 2Grades Available: Inconel 718 • Alloy 718 • UNS N07718 • Werkstoff Nr. 2.4668
- 3Surface Finish: Mill, Pickled, Bright Polished, Passivated & Electropolished
- 4Origin: India • USA • Europe
- 5Size Range: M3 – M64 • OD 6mm – 130mm • Thickness 0.5mm – 10mm
- 6Types: Flat, Spring, Belleville, Lock, Split, Sealing & Countersunk Washers
Or call our Mumbai office: +91 22 6743 7134 • Same-week dispatch on ready stock sizes
Ganpat Industrial manufactures Inconel 718 Washers by precision blanking and CNC turning certified UNS N07718 coil and bar stock, heat treated per AMS 5662 and AMS 5663 to hold torque and clamp load where standard steel or stainless washers tend to loosen. This nickel-chromium alloy retains strength above 650°C, resists sour gas per NACE MR0175, and withstands stress corrosion in marine and chemical environments making it ideal for gas turbines, wellhead flanges, cryogenic hardware and reactor internals. Every dispatch carries full heat traceability with mechanical test certificates. From Mumbai, with 25+ years in the industry, Ganpat Industrial Corporation supplies nickel alloy washers to processing plants, EPC contractors and traders across India, the GCC, Europe and Southeast Asia in ready stock or to custom drawings.
Mumbai · Nickel Alloy Precision Component Manufacturer & Exporter
Inconel 718 Washers Built To Retain Clamp Load Where Standard Fasteners Fail
Ganpat Industrial manufactures Inconel 718 (UNS N07718) Washers, age-hardened to perform in high-temperature, high-vibration and sour-service conditions — used under critical bolted connections on gas turbines, wellhead assemblies, cryogenic piping and reactor systems across India, the GCC and Europe.
- ✓ISO 9001:2015
- ✓NACE MR0175 Sour Service
- ✓PED 2014/68/EU
- ✓AS9100D Aerospace
- ✓Petrofac Approved Vendor
Premium ASTM B637 Fender Washer Manufacturer in India in Custom Sizes
Specification Of Inconel 718 Washers
ASME SA166 Split Washer Documentation
- Mill Test Certificate 3.1
- Material Traceability Report
- Packing List
- Certificate Of Origin
ASME SB670 Spring Washer Size Range
- Inner Dia: M3 – M64
- OD: 6mm – 130mm
- Thickness: 0.5mm – 10mm
- Custom OD/ID on drawing
UNS N07718 Lock Washer Material Grade
- UNS N07718
- WNR 2.4668
- Alloy 718
- ASTM B637 / B670
ASTM B637 Star Washer Production Route
- Precision Blanking
- Solution Anneal & Age
- CNC Fine Turning
- Pickling & Passivation
Alloy 718 Slot Washer Origin
- Indian Origin
- US Origin
- European Origin
- Traceable To Heat Number
Inconel Alloy 718 Machine Washer Surface Finish
- Pickled & Passivated
- Bright Machined Finish
- Black Oxide (on request)
- Natural Mill Finish
Nickel Alloy 718 Sealing Washer Packaging Method
- Anti-Tarnish VCI Wrap
- Poly Bagged Bundles
- Labelled Carton Boxes
- Wooden Pallet For Bulk
Inconel 718 Square Washer Governing Standard
- ASME SB670 / SB637
- ASTM B637 / A751
- ASME SA166
- AMS 5662 / AMS 5663
Werkstoff Nr. 2.4668 Countersunk Washer Testing Offered
- PMI Testing
- Proof Load Test
- Dye Penetrant (DPT)
- Third-Party Inspection
UNS N07718 Lock Washer Size Chart
Standard OD, ID and thickness combinations covering M3 to M30 are held ready for immediate dispatch
| Screw Size | Inner Dia (mm) | Outer Dia (mm) | Thickness (mm) | Approx Weight (g/pc) |
|---|---|---|---|---|
| M16 | 17.0 | 30 | 3.0 | 11.79 |
| M6 | 6.4 | 12 | 1.6 | 1.06 |
| M24 | 25.0 | 44 | 4.0 | 33.74 |
| M3 | 3.2 | 7 | 0.5 | 0.12 |
| M20 | 21.0 | 37 | 3.0 | 17.91 |
| M10 | 10.5 | 20 | 2.0 | 3.73 |
| M30 | 31.0 | 56 | 4.0 | 55.97 |
| M4 | 4.3 | 9 | 0.8 | 0.32 |
| M12 | 13.0 | 24 | 2.5 | 6.54 |
| M8 | 8.4 | 16 | 1.6 | 1.91 |
Supply Heavy Duty Werkstoff Nr. 2.4668 Flat Washer For Extreme Temperature Applications At Best Price
Application Of ASME SA166 Split Washer
Top Inconel 718 Washers Supplier in India serving gas turbines, wellheads and aerospace fastening needs.
Aerospace Fastener Systems
Nuclear Reactor Internals
High-Temperature Process Valves
Oil & Gas Wellhead Equipment
Motorsport & Turbocharger Assemblies
Marine & Subsea Fastening Systems
Cryogenic Rocket Propulsion Hardware
Gas Turbine Engine Assemblies
ASTM B637 Star Washer Testing Methods
Each testing stage verifies strength, purity and dimensional accuracy before final dispatch approval
Hardness Test
Confirms the age-hardened condition sits within AMS 5663 limits
Dye Penetrant Test
Surface flaw and burr screening on precision-blanked edges
Chemical Testing
Every heat lot confirmed against ASTM B637 composition limits before blanking
Proof Load Test
Spring and Belleville styles cycle-tested to confirm rated deflection load
PMI Testing
Positive Material Identification on every washer batch entering dispatch
Third-Party Inspection
TPI coverage through SGS, BV or TUV available for export orders
Types Of Alloy 718 Washer
All washer styles are blanked, formed and heat treated in house so buyers can order a complete fastening kit from one supplier.
Inconel 718 Flat Washer
ASME B18.22.1
UNS N07718 Lock Washer
DIN 127
ASME SB670 Spring Washer
DIN 128
ASME SA166 Square Washer
DIN 7980
Nickel Alloy 718 Sealing Washer
DIN 7603
Inconel Alloy 718 Wave Washer
ASME B18.22.1
Werkstoff Nr. 2.4668 Countersunk Washer
DIN 6917
Alloy 718 Belleville Washer
DIN 2093
Looking For An Inconel 718 Washer In A Custom OD Or Thickness?Share your drawing and receive a factory-direct quote within 24 hours.
Factors Affecting ASME SB670 Spring Washer Price
◆Raw Material Form – Coil, Bar Or Sheet
◆Washer Style & Tooling Requirement
◆Surface Finish & Passivation Requirement
◆Nickel & Niobium Market Index
◆Order Quantity & Lead Time
◆Solution Annealing & Age-Hardening Cycle
◆OD, ID & Thickness Combination
Get today’s Inconel 718 Washer priceDirect factory rates, ready stock on standard OD/ID combinations, and flexible MOQ for repeat buyers.
Inconel 718 Washers vs Inconel 625 Washers
Inconel 718 Washers
- Precipitation hardened
- Tensile strength ~1375 MPa
- Service limit 700°C
- Holds clamp load under vibration
- More economical per kg
- Suited for high-torque bolting
Inconel 625 Washers
- Solid-solution hardened
- Tensile strength ~830 MPa
- Service limit 980°C
- Resists pitting & crevice corrosion
- Costlier per kg
- Suited for extreme-heat corrosive zones
Physical Properties Of Nickel Alloy 718 Sealing Washer
Top Inconel 718 Washers Supplier in India backed by verified density, hardness and strength data.
Thermal Conductivity
∼11.4 W/m·K
At room temperature
Density
8.19 g/cm³
0.296 lb/in³ — used for weight/piece calculation
Modulus Of Elasticity
∼200 GPa
At room temperature, aged condition
Melting Range
1260–1336°C
2300–2437°F solidus to liquidus
Inconel 718 Flat Washer Chemical Composition
MolybdenumMo
2.80–3.30%
NickelNi
50.00–55.00%
CarbonC
≤ 0.08%
ChromiumCr
17.00–21.00%
AluminiumAl
0.20–0.80%
IronFe
Balance
TitaniumTi
0.65–1.15%
Niobium + TantalumNb+Ta
4.75–5.50%
Inconel Alloy 718 Machine Washer Mechanical Properties
Strength and hardness figures confirmed on every age-hardened lot per AMS 5663
Yield Strength (0.2%)
≥ 1034 MPa
Design Limit
Hardness
36 – 44 HRC
Wear Resistance
Tensile Strength
≥ 1241 MPa
High Load
Elongation (in 4D)
≥ 12%
Ductility
Temperature Range Of Werkstoff Nr. 2.4668 Countersunk Washer
Leading Inconel 718 Washer Manufacturer in India built to hold strength across a wide temperature range.
Sour Service
NACE MR0175
Compliant in the correctly aged condition
Cryogenic Rating
-253°C
Retains toughness in liquid hydrogen service
Clamp Load Retention
≥ 90%
Typical retention at 650°C after 1000 hrs
Max Continuous Service
700°C
Above this, aged strength begins to fall away
Equivalent Grades Of Inconel 718 Square Washer
Inconel 718 washers are recognised worldwide under these equivalent grade designations
EN / DIN / WNR
- Werkstoff Nr. 2.4668
- DIN 17752
- NiCr19Fe19NbMo3
JIS
- NCF718
- JIS H4551
- JIS G4901 Reference
India Import Reference
- No Direct BIS Equivalent
- ASTM B637 Referenced
- HSN Code 7318.22
GB
- GH4169
- GB/T 14992
- GB/T 15760
BS
- BS 3S169
- BS HR6
- BS EN 2.4668
ASTM / ASME / AMS
- ASTM B637 / ASME SB637
- UNS N07718
- AMS 5662 / 5663
Need Inconel 718 Washers In Bulk Quantity For Your Project?Send your BOQ and receive factory pricing with MTC 3.1, dispatched within the same week.
UNS N07718 Round Washer Test Certificates
Third-Party Inspection Certificate
On request, every Inconel 718 Washer order can be inspected and certified by an independent third-party agency such as SGS, BV or TUV, covering dimensional checks, hardness verification and visual inspection prior to dispatch.
Inconel 718 Washers Delivered Weekly To The Following Countries
| Export To | Countries | Continent | Shipping Time (Days) | Port |
|---|---|---|---|---|
| Kuwait | Asia | 10 | Mina Al Shuaiba | |
| Egypt | Africa | 18 | Damietta | |
| Netherlands | Europe | 30 | Den Helder |
Monthly Delivery Of Inconel 718 Washers To Below Countries
| Export To | Countries | Continent | Shipping Time (Days) | Port |
|---|---|---|---|---|
| Bahrain | Asia | 9 | Mina Salman | |
| Morocco | Africa | 45 | Nador |
Hardening & Heat Treatment Of ASME SB670 Conical Washer
A controlled two step aging cycle develops full precipitation strength in Inconel 718 washers
Stress Relieving
Below aging temperature, applied post-blanking on request
Air Cooling
First Age (Precipitation)
720°C (1328°F) • held 8 hours, furnace cool
AMS 5663
Solution Annealing
980°C – 1020°C (1796°F – 1868°F) • held 1 hour
Water / Air Quench
Second Age (Precipitation)
620°C (1148°F) • held 8 hours, air cool
Total Cycle 18 Hrs
Characteristics Of ASTM B637 Ogee Washer
Key traits that make Inconel 718 washers reliable under extreme operating conditions
NACE MR0175 Sour-Service Qualified
Suitable for direct exposure to H2S bearing wellhead environments
Superior Creep & Rupture Strength
Holds clamp load under sustained load at elevated temperature
Low Thermal Expansion Coefficient
Keeps torque consistent across large heat-up and cool-down cycles
Exceptional High-Temperature Strength
Retains rated strength up to 700°C, well past ordinary stainless washers
Weldable In The Aged Condition
Accepts TIG repair welds without excessive cracking tendency
Stress Corrosion Cracking Resistant
Stands up to chloride and sour-gas atmospheres without cracking
Alloy 718 Belleville Washer Packaging
Every shipment is packed and labelled to prevent damage and ensure full traceability in transit
Labelled Carton Boxes
PO number, size & heat number marked on every carton
Wooden Pallet / Container Load
For bulk quantities & full container shipments
Anti-Tarnish VCI Wrapping
Corrosion-inhibiting wrap applied before bundling
Piece-Count Poly Bagging
Bundled by size, count verified against packing list
HSN Code Of Nickel Alloy 718 Fender Washer
Confirm the exact HSN sub heading with your customs broker before filing
HS Chapter
Chapter 75
Nickel & Articles Of Nickel
Common Heading
HSN 7508
Other Articles Of Nickel
Certificate Needed
EN 10204 3.1
For customs & end-user compliance
Origin Document
HSN 7318.22
For preferential duty claims under FTA
Inconel 718 Washers Frequently Asked Questions
What is the maximum service temperature for Inconel 718 Washers?
They hold their age hardened strength up to 700°C, making them suitable for turbine and high-heat bolting.
Are Inconel 718 Washers suitable for sour gas / H2S service?
Yes, in the correctly aged condition they are qualified against NACE MR0175 for sour wellhead environments.
Which washer styles are available in Alloy 718?
Flat, spring, lock, split, sealing, Belleville, wave and countersunk washers are all produced in house.
Do Inconel 718 Washers come with material test certificates?
Yes, every dispatch includes an EN 10204 3.1 Mill Test Certificate with full heat traceability.
What sizes are available in Inconel 718 Washers?
Standard sizes cover M3 to M64, with custom OD, ID and thickness available on drawing.
We Collaborate With Traders In The Following Locations
| Dammam | Nigeria | Gabon | Al Jubail | Kenya | Tunisia |
| Angola | Texas | Ghana | Riyadh | USA | Oman |
| Abu Dhabi | Tanzania | Morocco | Zambia | Al-khobar | Algeria |
| Saudi Arabia | South Africa | Egypt | Carolina | Houston | UAE |
| Mozambique | New South Wales | Dubai | Indiana | Ethiopia | California |
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