Ganpat Industrial Wins Buyer Trust For Incoloy 825 Washers
38–46% Nickel, Mill-Direct
Heats sourced against certified ASTM B408 B564 material
One Drawing, Every Type
All washer types ship under one single PO
NACE MR0175 Sour-Service Grade
Heats meet ISO 9001 and PED standards. EN 10204 3.1 certification is available on request.
PMI & Pitting Verified
Every lot checked for molybdenum content before dispatch
Quote Within 24 Hours
Standard sizes stay ready in stock. They ship within the same week.
Incoloy 825 Washer Overview
- 1Type: Flat, Spring, Disc, Wave, Square, Plain, Split, High-Collar, Helical
- 2Size Range: M3 to M36 • OD 7 mm to 110 mm • per ISO 7089 / 7093
- 3Common Grades: UNS N08825, W.Nr 2.4858, Alloy 825, Nickel Alloy 825
- 4Finish: Bright Annealed, Pickled & Passivated, Natural Mill Finish
- 5Standards: ASTM B408, ASTM B564, ASME SB408, ASME B18.22.1, ISO 7089
- 6Origin: Indian origin • European origin • Japanese origin
Or call our Mumbai office: +91 22 6743 7134 • Same-week dispatch on ready stock sizes
Incoloy 825 washers contain nickel molybdenum and copper. This makes them last longer than 316 rings. They resist sulfuric phosphoric acid and sour gas well. Titanium stabilisation stops grain boundaries from sensitising during welding. Ganpat Industrial blanks punches and cold forms every washer in house. We use mill certified stock matching your BOQ profile. Buyers pick Alloy 825 for acid evaporators sour wellheads and scrubbers. Nuclear reprocessing lines use it too since ordinary grades pit. Ganpat Industrial is a Mumbai based manufacturer exporter with 25 years experience. We focus on nickel alloy and stainless fasteners for India UAE and Middle East.
Mumbai · Incoloy 825 Washers Manufacturer & Exporter
Incoloy 825 Washers Built For Sour Gas, Acid Duty And Joints Where 316 Grade Sensitises
Ganpat Industrial supplies UNS N08825 / W.Nr 2.4858 alloy washers. These serve acid plants and sour gas wells.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓NACE MR0175
Discover UNS N08825 Flat & Spring Washers Manufacturer in India Known for Superior Corrosion Resistance & High Strength
Incoloy 825 Washers Specification
Alloy 825 Plain Washer Material
- UNS N08825
- W.Nr 2.4858
- Alloy 825
- ASTM B408 / B564
ASTM B408 Incoloy® Alloy 825 Thick Flat Washer Testing
- PMI Testing
- Intergranular Corrosion Test
- Dimensional Check
- Third-Party Inspection
Incoloy 825 Flat & Spring Washer Origin
- Indian Origin
- European Origin
- Japanese Origin
- Traceable To Heat Number
Nickel Alloy 825 Disc Spring Washer Size Range
- ID: M3 – M36
- OD: 7 – 110 mm
- Thickness: 0.5 – 8 mm
- Custom sizes on drawing
Incoloy 825 High Collar Flat Washer Documentation
- Mill Test Certificate 3.1
- NABL Lab Report
- Packing List
- Certificate Of Origin
UNS N08825 Split Spring Washer Surface Finish
- Bright Annealed
- Pickled & Passivated
- Polished
- Natural / Mill Finish
1.4876 Flat Waher Helical Spring Washers SAE / USS Production Route
- Precision Blanking
- CNC Punching
- Cold Forming (Spring/Disc)
- Deburring & Tumbling
Incoloy® Alloy 825 Square Spring Washer Governing Standard
- ASTM B408 / ASME SB408
- ASTM B564 (Forged Discs)
- ASME B18.22.1
- ISO 7089 / 7090 / 7093
Incoloy 825 Washer Corrosion Resistance
- Resists Chloride Pitting
- Resists Sulfuric & Phosphoric Acid
- NACE MR0175 Sour Service
- Non-Sensitising Under Welding Heat
Shop Alloy 825 Plain Washer in Size Range M3 to M100 with Bright, Plain & Polished Finish for Desalination Plants
Alloy 825 Plain Washer Size Chart
We are a trusted Incoloy 825 Washers Supplier in India. We control ID, OD, and thickness tightly.
| Bolt Size | Normal Series — ISO 7089 | Large Series — ISO 7093-1 | ||||
|---|---|---|---|---|---|---|
| ID d1 (mm) | OD d2 (mm) | Thickness (mm) | ID d1 (mm) | OD d2 (mm) | Thickness (mm) | |
| M3 | 3.2 | 7 | 0.5 | 3.2 | 9 | 0.8 |
| M4 | 4.3 | 9 | 0.8 | 4.3 | 12 | 1.0 |
| M5 | 5.3 | 10 | 1.0 | 5.3 | 15 | 1.0 |
| M6 | 6.4 | 12 | 1.6 | 6.4 | 18 | 1.6 |
| M8 | 8.4 | 16 | 1.6 | 8.4 | 24 | 2.0 |
| M10 | 10.5 | 20 | 2.0 | 10.5 | 30 | 2.5 |
| M12 | 13.0 | 24 | 2.5 | 13.0 | 37 | 3.0 |
| M14 | 15.0 | 28 | 2.5 | 15.0 | 44 | 3.0 |
| M16 | 17.0 | 30 | 3.0 | 17.0 | 50 | 3.0 |
| M18 | 19.0 | 34 | 3.0 | 19.0 | 56 | 4.0 |
| M20 | 21.0 | 37 | 3.0 | 21.0 | 60 | 4.0 |
| M24 | 25.0 | 44 | 4.0 | 25.0 | 72 | 5.0 |
| M30 | 31.0 | 56 | 4.0 | 33.0 | 92 | 6.0 |
| M36 | 37.0 | 66 | 5.0 | 39.0 | 110 | 8.0 |
Sizes follow ISO 7089 and 7093-1 standards. We produce these washers in Incoloy 825.
Types Of Incoloy 825 Washers
Alloy 825 Plain Washer
ISO 7089
Incoloy Alloy 825 Spring Washer
Combination
Nickel Alloy 825 Helical Spring Washer
DIN 127
Incoloy 825 Wave Spring Washer
Wave Form
Incoloy 825 Disc Spring Washer
DIN 2093
UNS N08825 Thick Flat Washer
ISO 7093
1.4876 Flat Waher Split Spring Washer
Split Lock
Incoloy 825 Physical & Thermal Properties
These are the standard physical and thermal properties of Incoloy® Alloy 825 (UNS N08825) in the annealed condition, independent of washer geometry.
Density
8.14 g/cm³
0.294 lb/in³
Melting Range
1370–1400°C
2500–2550°F
Specific Heat
440 J/kg·°C
0.105 Btu/lb·°F
Modulus Of Elasticity
≈196 GPa
28.4 × 10⁶ psi
Thermal Conductivity
≈11.1 W/m·K
At room temperature
Coefficient Of Expansion
≈14.0 µm/m·°C
20–100°C range
Curie Temperature
< –196°C
< –320°F
Magnetic Permeability
≈1.005 max
At 200 Oersted, effectively non-magnetic
Key Characteristics Of Incoloy 825
Alongside washer-specific specification data, buyers evaluating Incoloy® Alloy 825 typically look for these broader material characteristics.
Dual-Direction Acid Resistance
- Resists both reducing & oxidizing acids
- Strong in sulfuric & phosphoric duty
- Performs across wide acid concentrations
Chloride & Pitting Resistance
- Tolerant to chloride-ion stress-corrosion cracking
- Resists pitting & crevice corrosion
- Suited to seawater & brackish service
Titanium-Stabilised Weldability
- Titanium addition limits carbide precipitation
- Resists sensitisation in weld heat-affected zones
- Good qualities with conventional welding processes
Strength Across Temperatures
- Good tensile, fatigue & creep strength
- Usable from cryogenic to elevated temperature
- Retains toughness in service
Non-Magnetic (Annealed)
- Low magnetic permeability when annealed
- Suited to instrumentation & sensitive assemblies
- Austenitic grain structure
Broad Process Compatibility
- Used in chemical & petrochemical plant
- Fits pollution-control & scrubber duty
- Common in oil & gas sour service
Looking For A Custom UNS N08825 Ring Or Disc Size?Share your drawing. Get a factory price quote within 24 hours.
ASTM B408 Incoloy® Alloy 825 Thick Flat Washer Weight Chart
| APPROX. WEIGHT IN KGS FOR 100 NOS — NORMAL SERIES (ISO 7089) | ||
|---|---|---|
| Bolt Size | OD × Thickness (mm) | Weight / 100 Pcs (kg) |
| M3 | 7 × 0.5 | 0.012 |
| M4 | 9 × 0.8 | 0.032 |
| M5 | 10 × 1.0 | 0.046 |
| M6 | 12 × 1.6 | 0.105 |
| M8 | 16 × 1.6 | 0.190 |
| M10 | 20 × 2.0 | 0.371 |
| M12 | 24 × 2.5 | 0.651 |
| M14 | 28 × 2.5 | 0.894 |
| M16 | 30 × 3.0 | 1.172 |
| M18 | 34 × 3.0 | 1.525 |
| M20 | 37 × 3.0 | 1.780 |
| M24 | 44 × 4.0 | 3.353 |
| M30 | 56 × 4.0 | 5.563 |
| M36 | 66 × 5.0 | 9.549 |
Weights are calculated from nominal dimensions only. Actual weight varies slightly with tolerance, finish.
What Actually Moves The Price
◆Order Quantity
◆Type (Flat / Spring / Disc)
◆Finish & Testing
Request A Live Incoloy 825 Washer Quote NowFactory price and ready stock on standard sizes. No minimum order penalty for repeat buyers.
Application Of Incoloy 825 Flat & Spring Washer
We are a well-known Incoloy 825 Washers Manufacturer in India. They resist acid where stainless grades fail.
Phosphoric & Sulfuric Acid Plants
Sour Oil & Gas Wellheads (NACE)
Flue Gas Desulfurization Scrubbers
Nuclear Fuel Reprocessing Vessels
Marine Propeller Shafts & Fittings
Pickling Equipment & Tank Trucks
Food, Water & Hot Vessel Fittings
Chemical & Petrochemical Vessels
Working On A Sour Gas Or Acid-Duty Joint?Tell us the media. We recommend the grade finish and testing.
Nickel Alloy 825 Disc Spring Washer Pressure Rating
Per ASME B16.5 Material Group 3.8
These washers suit flange joints, Class 150–2500. Flange class, not washer, sets joint pressure.
ASME B16.5 Group
3.8
Nickel-alloy material group for N08825
Max. Service Temp.
538°C / 1000°F
Annealed condition per ASME B16.5
Pressure Classes Covered
150 – 2500
150 • 300 • 600 • 900 • 1500 • 2500
Required Condition
Annealed Only
Per ASME B16.5 for Alloy 825 hardware
Incoloy 825 High Collar Flat Washer Thickness Schedule Chart
Washers come in four thickness series options. Choose schedule matching bolt load and surface.
Narrow Series
ISO 7092
Thin / Light Duty
Normal Series
ISO 7089
Standard / Baseline
Large / Wide Series
ISO 7093
Wide Load Spread
Extra Thick Series
ISO 7094
Heavy / High Preload
UNS N08825 Split Spring Washer Chemical Composition
Per ASTM B408 / UNS N08825
Nickel
38.00–46.00%
Iron
22.00% min
Chromium
19.50–23.50%
Molybdenum
2.50–3.50%
Copper
1.50–3.00%
Titanium
0.60–1.20%
Manganese
≤ 1.00%
Silicon
≤ 0.50%
Aluminium
≤ 0.20%
Carbon
≤ 0.05%
Sulphur
≤ 0.03%
This shows nominal chemical limits per specification. It follows ASTM B408 UNS N08825 standard.
1.4876 Flat Waher Helical Spring Washers Mechanical Properties
Annealed Condition — ASTM B408
Tensile Strength
≥ 586 MPa
85 KSI Min
Yield Strength (0.2%)
≥ 241 MPa
35 KSI Min
Elongation (In 2″)
≥ 30%
Ductility
Hardness
≤ 165 HB
Wear Resistance
Incoloy® Alloy 825 Square Spring Washer Material Equivalent
ASTM / ASME (USA)
- UNS N08825
- ASTM B408 / SB408
- ASTM B564
- ASME B18.22.1
DIN / Werkstoff (Germany)
- W.Nr 2.4858
- NiCr21Mo
- DIN 17750 / 17752
BS (Britain)
- BS 3072/3076 NA16
- Nickelvac 825
JIS (Japan)
- NCF 825
- JIS G4901
AFNOR (France)
- NC19FeNb
- NF A36-700
GOST (Russia)
- ХН75МБТю
- ЭИ602
Sourcing In Bulk For A Refinery Or EPC Project?Send your BOQ for a factory price. We dispatch with MTC 3.1 the same week.
Incoloy Alloy 825 Wave Spring Washer HSN Code & GST Rate
HSN Chapter
75
Nickel and articles of nickel
HSN Heading
7508
Other articles of nickel
Washer Specific Code
7508 90 90
Other articles of nickel & nickel alloy
GST Rate
18%
Standard rate on nickel-alloy washers
Incoloy 825 Washers Test Certificates
Mill Test Certificate 3.1
Every dispatch carries an EN 10204 3.1 certificate. This is traceable to the original heat number. We check it against ASTM B408 chemistry limits. We also verify mechanical limits before it ships.
Incoloy 825 Washers Material Testing
We are a reliable Incoloy 825 Washers Supplier in India. We check PMI and grain integrity too.
PMI Testing
Positive Material Identification runs on every lot. This confirms nickel and molybdenum content.
Intergranular Corrosion Test
Confirms titanium stabilisation against sensitisation per ASTM A262
Dimensional Check
OD ID and thickness verified against drawing tolerance
Hardness Test
Confirms annealed condition meets ASTM B408 limits
Visual & Surface Check
Screened for burrs pitting and finish defects
Third-Party Inspection
TPI available on request for large export orders
Incoloy 825 Washers Documentation Offered
NABL Lab Report
Independent chemistry & mechanical test results
On Request
Packing List
Itemised piece count weight and carton breakup
Every Order
Certificate Of Origin
For customs clearance & import duty processing
Export Orders
Commercial Invoice
PO-matched invoice with HSN & GST breakup
Every Order
Incoloy 825 Washers Export Packaging
Poly Bag & Carton
Standard retail-ready packing for small orders
Wooden Pallet Box
For bulk quantities
VCI / Vacuum Pack
This packing is corrosion inhibited and moisture sealed. It suits long transit sea freight shipments.
Custom Labelling
PO number marked per buyer requirement
Incoloy 825 Washers Delivered Weekly To The Following Countries
| Export To | Countries | Continent | Ports | Shipping Time |
|---|---|---|---|---|
 |
Netherlands | Europe | Harlingen | 30 days |
 |
Kenya | Africa | Lamu | 19 days |
 |
Egypt | Africa | Damietta | 18 days |
Monthly Delivery Of Incoloy 825 Washers To Below Countries
| Export To | Countries | Continent | Ports | Shipping Time |
|---|---|---|---|---|
 |
Oman | Asia | Sultan Qaboos | 5 days |
 |
South Africa | Africa | Elizabeth | 25-30 days |
Frequently Asked Questions
Is an Incoloy Alloy 825 Wave Spring Washer magnetic?
No, alloy 825 is non-magnetic when annealed. This results from its austenitic grain structure.
Is Alloy 825 Plain Washer the same as Inconel 625?
No, both nickel alloys serve different duties. Alloy 825 suits acid; 625 suits heat.
Can ASTM B408 Incoloy® Alloy 825 Thick Flat Washer be used in sour gas service?
Yes, Alloy 825 is listed under NACE MR0175. This covers sour oil and gas service.
What is the minimum order quantity for Incoloy 825 Flat & Spring Washer?
We supply small trial lots and onward. Share your size and quantity for quote.
Discover Our Ready Inventory In These Countries
| Dubai | Ghana | Al Jubail | Texas | Nigeria |
|---|---|---|---|---|
| Mozambique | Egypt | Kenya | Riyadh | South Africa |
| Angola | USA | New South Wales | Dammam | Tunisia |
| Saudi Arabia | Gabon | California | Abu Dhabi | Zambia |
| Oman | Al-khobar | Ethiopia | Carolina | UAE |
| Houston | Morocco | Algeria | Tanzania | Indiana |
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