Why Buyers Choose Ganpat Industrial For 17-4 PH Stainless Steel Washers ?
Genuine UNS S17400 Heats
Every coil is heat-certified against ASTM A693 Type 630 chemistry before blanking.
H900 To H1150 On Demand
Precipitation-hardening condition selected to match your torque & hardness spec.
Flat, Lock, Spring & Conical Ready
Eight washer styles loaded on a single skid for mixed fastener orders.
Rockwell & PMI Verified
Hardness and Positive Material Identification confirmed on every batch, not by sample.
Fast-Moving Sizes In Stock
M3 to M36 flat and lock washers dispatch within days on standard orders.
17-4 PH Stainless Steel Washers Abstract
- 1Product Range: Flat, Lock, Square, Sealing, Slot, Spring, Machine & Star Washers
- 2Size Range: M3 x 7mm OD – M36 x 66mm OD, custom OD/ID on drawing
- 3Standards: ASTM A693, ASTM A564, AMS 5643, DIN 125, ISO 7089
- 4Surface Finish: Passivated, Electropolished, Bright Annealed, Shot Peened
- 5Common Marking: 17-4PH, UNS S17400, AISI 630, WNr 1.4542
- 6Origin: Indian, European, Japanese, Germany
Or call our Mumbai office: +91 22 6743 7134 • Same-week dispatch on standard sizes
Ganpat Industrial is a hands-on 17-4 PH stainless steel washers supplier in India. Every ring is blanked from certified UNS S17400 coil for real strength. This ensures precipitation-hardened performance instead of a soft austenitic substitute. Our shop delivers AISI 630 Flat Washers for structural bolting needs. We also supply WNr 1.4542 Lock Washers for vibration-prone joints. Matching Spring, Sealing, Square and Conical washers complete every hardware kit. Full mill traceability is ensured on every single dispatch.
Mumbai · 17-4 PH SS Washers Precipitation-Hardened Fastener Exporter
17-4 PH Stainless Steel Washers Built For High-Strength, Corrosion-Resistant Bolted Joints
Ganpat Industrial blanks and stocks 17-4 PH SS Washers / UNS S17400 Washers / WNr 1.4542 Washers in flat, lock, spring and conical profiles for engineers who need genuine martensitic precipitation-hardening strength for aerospace, oil & gas, marine and high-pressure valve assemblies across India, the GCC and Southeast Asia.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓AS9100 Aerospace Ready
- ✓Mill Test Certificate 3.1
- ✓Third-Party Inspection Approved
Leading 17-4 PH Stainless Steel Washers Manufacturer In India With Size M3 To M36 At Factory Price
Specification Of 17-4 PH Stainless Steel Washers
17-4PH Washer Size Range
- Bore: M3 – M36
- Outer Diameter: 7mm – 66mm
- Thickness: 0.5mm – 5mm
- Custom OD/ID on drawing
UNS S17400 Washer Governing Standard
- ASTM A693 Type 630
- ASTM A564 (bar & wire)
- AMS 5643 (aerospace)
- DIN 125 / ISO 7089
WNr 1.4542 Washer Route
- Cold Rolled Strip / Wire
- Solution Annealing
- Blanking & Piercing
- Precipitation Hardening
17-4PH SS Washer Finish Options
- Passivated Mill Finish
- Deburred & Tumbled
- Chamfer / Bevel On Request
- Custom Slotting Available
AISI 630 Washer Grade Material
- UNS S17400
- WNr 1.4542
- Martensitic Precipitation-Hardening Steel
- SUS 630 Equivalent
17-4PH Washer Testing
- Rockwell C Hardness Test
- PMI Testing
- Dimensional Check
- Third-Party Inspection
17-4 PH Stainless Steel Washers Dimension Chart
| Bolt Size | Thickness mm | Outer Dia (OD) mm | Inner Dia (ID) mm |
|---|---|---|---|
| M3 | 0.5 | 7.0 | 3.2 |
| M4 | 0.8 | 9.0 | 4.3 |
| M5 | 1.0 | 10.0 | 5.3 |
| M6 | 1.6 | 12.0 | 6.4 |
| M8 | 1.6 | 16.0 | 8.4 |
| M10 | 2.0 | 20.0 | 10.5 |
| M12 | 2.5 | 24.0 | 13.0 |
| M14 | 2.5 | 28.0 | 15.0 |
| M16 | 3.0 | 30.0 | 17.0 |
| M18 | 3.0 | 34.0 | 19.0 |
| M20 | 3.0 | 37.0 | 21.0 |
| M24 | 4.0 | 44.0 | 25.0 |
| M30 | 4.0 | 56.0 | 31.0 |
| M36 | 5.0 | 66.0 | 37.0 |
Get A Wide Range Of UNS S17400 Washer Stock Online, Tested With Rockwell Hardness & PMI
Testing Methods Of SS 17-4PH Washers
Every batch is verified by a strict 17-4 PH Stainless Steel Washer Manufacturer in India.
Rockwell C Hardness
Verifies the H900 – H1150 condition against spec on every heat
Tensile & Proof Load Testing
Confirms yield and ultimate strength per aging condition selected
Dimensional Inspection
ID, OD & flatness gauged against drawing on every lot
Need A Custom 17-4PH Washer OD, ID Or Thickness?Share your drawing or cutting list – get a factory-price quote within 24 hours.
Types Of 17-4 PH Stainless Steel Washers
As an active 17-4 ph stainless steel washers Supplier in India, we blank and stock the following styles under one roof.
SS 17-4ph Flat Washers
DIN 125
17-4ph SS Lock Washer
DIN 127
SS 17-4ph Square Washer
ASME B18.22.1
SS 17-4ph Sealing Washer
DIN 7603
SS 17-4ph Slot Washer
Custom Drawing
SS 17-4ph Spring Washer
DIN 137
ASTM A479 Machine Washers
ASTM A479
17-4ph SS Star Washer
DIN 6798
17-4 PH Stainless Steel Washers Equivalent Grades
ASTM / UNS
- UNS S17400
- ASTM A693 Type 630
- ASTM A564 Type 630
- AISI 630
JIS
- SUS 630
- JIS G4303 (bar)
- JIS G4308 (wire)
DIN / WNr
- WNr 1.4542
- X5CrNiCuNb16-4
- EN 10088-3
SS 17-4PH Washer Heat Treatment Conditions – H900 To H1150
H900 (482°C Age)
40-47 HRC
Max Strength
H1025 (552°C Age)
32-38 HRC
Balanced
H1075 (579°C Age)
30-36 HRC
More Ductile
H1150 (621°C Age)
28-33 HRC
Best Corrosion
17-4PH Flat Washer Vs Spring Washer – Which To Choose ?
17-4PH Flat Washer
- Even, wide load-bearing surface
- Protects the joint face from marring
- Preferred where torque values are high
- Simple to stack in multiples
17-4PH Spring / Lock Washer
- Adds axial spring tension to the joint
- Resists loosening under vibration
- Preferred on rotating or cyclic assemblies
- Lower clamp-face contact area
Weekly Delivery Of 17-4 PH Stainless Steel Washers In These 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 |
HSN Code For 17-4PH SS Washers
HSN Code – Flat / Machine Washer
7318.22
Other washers of iron or steel
HSN Code – Spring / Lock Washer
7318.21
Spring washers & other lock washers
RoDTEP Cover
Applicable
Duty remission on qualifying export shipments
Comparing H900 With H1150 For Your Application?Send your load & corrosion exposure – we recommend the right condition.
Chemical Composition Of SS 17-4PH Washers
ChromiumCr
15.00-17.50%
NickelNi
3.00-5.00%
CopperCu
3.00-5.00%
ManganeseMn
≤ 1.00%
SiliconSi
≤ 1.00%
CarbonC
≤ 0.07%
PhosphorusP
≤ 0.040%
SulphurS
≤ 0.030%
Mechanical Properties Of 17-4 PH Stainless Steel Washers
Tensile Strength
≥ 1310 MPa
High Strength
Yield Strength (0.2%)
≥ 1170 MPa
Design Limit
Elongation (2″)
≥ 10%
Ductility
Hardness
40-47 HRC
Wear Resistance
Need A Certified Hardness & Tensile Report?Send washer size, condition & quantity for a free review.
Application Of 17-4PH SS Washers
Get 17-4 Ph Stainless Steel Washers Supplier in India ship into these industries every week, backed by full mill traceability on each dispatch.
Aerospace Fastener Assemblies
Oil & Gas Valve Assemblies
High-Pressure Hydraulic Fittings
Marine & Offshore Hardware
Pump & Turbine Component Fastening
Defence & Firearms Components
Nuclear Plant Fastening Systems
Food & Beverage Process Equipment
Monthly Delivery Of 17-4 PH Stainless Steel Washers In These Countries
| Export to | Continent | Shipping Time |
|---|---|---|
Indonesia |
Asia | 9 Days |
Philippines |
Asia | 14 Days |
Spain |
Europe | 30 Days |
Germany |
Europe | 20 Days |
Surface Coating Of Stainless Steel 17-4ph Flat Washers
Passivated Mill Finish
Standard acid-passivated surface for general corrosion protection
Electropolished
Bright, low-friction surface with reduced micro-crevices for hygienic use
Bright Annealed
Smooth reflective finish retained straight from heat treatment
Shot Peened
Induces compressive surface stress to raise fatigue life on spring washers
PTFE Dry-Film Coated
Anti-galling lubricant coating for high-torque or repeat-assembly joints
Is 17-4PH Washer Magnetic ? Corrosion & Galling Behaviour
Yes, It Is Magnetic
17-4PH is a martensitic grade, so it responds strongly to a magnet, unlike austenitic 304 or 316.
Moderate Corrosion Resistance
Copper-alloyed chemistry resists mild atmospheric and freshwater exposure but trails 316 in chlorides.
Watch For Galling
Higher hardness reduces galling risk versus 304/316, but a light anti-seize is still recommended.
Better Corrosion At H1150
Over-aging to H1150 lowers hardness but improves stress-corrosion cracking resistance meaningfully.
Avoid Chloride Immersion
Not recommended for continuous seawater immersion without a supplemental protective coating.
Passivate After Machining
Post-blank passivation per ASTM A967 restores the chromium oxide layer disturbed during forming.
Unsure Which Aging Condition Suits Your Environment?Share operating temperature & corrosion exposure – we’ll advise the grade.
Manufacturing Process Of 17-4 PH SS Washers
Coil / Wire Selection & Heat Check
Every coil is verified against the UNS S17400 heat certificate first
Blanking & Piercing
Strip is punched into washer blanks on precision progressive tooling
Solution Annealing
Heated to 1020-1060°C and air cooled to set the martensitic base structure
Precipitation Hardening
Aged at 482-621°C to reach the ordered H900-H1150 hardness condition
Deburr, Passivate & PMI Check
Final deburring, passivation and PMI check before dispatch
Documentation Offered With SS 17-4ph Washers
Connect with 17-4 Ph Stainless Steel Washers Supplier in India serving with complete mill certification on every batch.
Mill Test Certificate 3.1
Chemistry, hardness & tensile results traced to heat number
Every Order
PMI Test Report
Positive Material Identification confirming chromium, nickel & copper
On Request
Hardness Test Report
Rockwell C reading confirming H900-H1150 condition ordered
On Request
Certificate Of Origin
For customs clearance & import duty processing
Export Orders
Packing List & Invoice
PO-matched, HSN & GST breakup included
Every Order
Installation Guideline For 17-4PH SS Washers
Match Hardness To Torque Spec
Confirm the H900-H1150 condition matches the bolt torque and load chart
Check ID/OD Clearance
Verify bore fits the fastener shank without excess side play
Apply Anti-Seize
A light anti-galling compound prevents thread and face galling on assembly
Orient Chamfer Correctly
Place the chamfered or conical face toward the bolt head as specified
Avoid Dissimilar Metal Contact
Isolate from aluminium or carbon steel where galvanic corrosion is a risk
Frequently Asked Questions
Is 17-4 PH stainless steel washer magnetic?
Yes, being a martensitic grade it responds to a magnet, unlike austenitic 304 or 316 washers.
What is the HSN code for 17-4PH washers?
Flat and machine washers fall under HSN 7318.22, while spring and lock washers fall under 7318.21.
What is the difference between H900 and H1150 condition?
H900 gives the highest hardness and strength, while H1150 trades some strength for better ductility and corrosion resistance.
Can 17-4PH washers be supplied in conical or slotted styles?
Yes, we supply conical spring washers, slot washers and star washers alongside standard flat and lock types.
We Collaborate With Traders in the Following Cities
| Texas (USA) | California (USA) |
| Al Jubail (Saudi Arabia) | Dubai (UAE) |
| Dammam (Saudi Arabia) | Abu Dhabi (UAE) |
| Riyadh (Saudi Arabia) | Houston (USA) |
| Al Khobar (Saudi Arabia) | Indiana (USA) |
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