Why Global Buyers Trust Ganpat Industrial For Stainless Steel 347H Washers ?
Carbon Window Held For Creep Strength
0.04–0.10% C keeps stress-rupture properties code-qualified
Rated For Sustained Service Above 525°C
Qualifies for elevated-temperature design per ASME B31.3
Ready Stock & Custom Sizes
Every profile packed and export-ready on one dispatch
Heat-Batch Traceable
UNS S34709 heats logged and matched to every consignment
Established Exporter To The GCC
Regular shipments cleared to UAE, Qatar, Oman & Kuwait
Stainless Steel 347H Washers Snapshot
- 1Size Range: M2 to M36 • OD 5 mm to 66 mm • per ASTM A240
- 2Common Grades: UNS S34709, EN 1.4961, AISI 347H, Werkstoff Nr. 1.4961
- 3Finish: Bright Annealed, Passivated, Polished, Natural Mill Finish
- 4Standards: ASME B18.22.1, DIN 125, DIN 127, DIN 6796, ISO 7089/7090
- 5Origin: Indian origin • Japanese origin • European origin
- 6Type: Plain, Spring, Fender, Sealing, Flat, Lock, Conical, Countersunk
Or call our Mumbai office: +91 22 6743 7134 • Same-week dispatch on ready stock sizes
Ganpat Industrial holds the carbon band of every UNS S34709 Washer and EN 1.4961 Washer between 0.04% and 0.10%, the exact window refinery and power-plant codes ask for when a fastener must carry load at sustained high temperature for years, not hours. Each Stainless Steel 347H Washer we forge is built for creep-duty piping, superheater supports and long-cycle furnace equipment where an ordinary austenitic washer would eventually give way.
Mumbai · Forging Manufacturer & Exporter
Stainless Steel 347H Washers Engineered For Creep-Rated, Long-Duration Heat Service
Ganpat Industrial manufactures and exports Stainless Steel 347H Washers – Ready Stock & Custom Sizes – for buyers running refinery piping, superheater supports and furnace assemblies that stay hot for years across India, the GCC, Africa and Southeast Asia.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
Trusted ASTM A479 Spring Washers Manufactured and Supplied Directly from India Offering Verified Sizes with Accurate HSN Code Details
Specification Of Stainless Steel 347H Washers
Stainless Steel 347H Plain Washers Size Range
- ID: M2 – M36
- OD: 5 – 66 mm
- Thickness: 0.3 – 5 mm
- Custom sizes on drawing
UNS S34709 Fender Washers Standards
- ASME B18.22.1
- DIN 125 / DIN 127
- ISO 7089 / 7090 / 7091
- ISO 3506 (A4-70)
EN 1.4961 Star Washers Production Route
- Precision Blanking
- CNC Punching
- Cold Forming (Spring/Conical)
- Deburring & Tumbling
ASTM 347H Lock Washers Surface Finish
- Bright Annealed
- Passivated (ASTM A967)
- Polished
- Natural / Mill Finish
AISI 347H Sealing Washers Material Grade
- UNS S34709
- EN 1.4961
- AISI 347H
- ASTM A240
SS 347H Spring Washers Carbon-Controlled Stabilisation
- Carbon: 0.04% – 0.10%
- Nb+Ta: 8xC min – 1.10% max
- Holds creep strength at heat
- Stable up to 900°C
SUS 347H Split Washers Testing Method
- PMI Testing
- High-Temperature Soak Test
- Dimensional Check
- Third-Party Inspection
Stainless Steel S34709 Sealing Washers Documentation
- Mill Test Certificate 3.1
- NABL Lab Report
- Packing List
- Certificate Of Origin
INOX 347H Square Washers Origin
- Indian Origin
- Japanese Origin
- European Origin
- Traceable To Heat Number
Stainless Steel 347H Spring Washers HSN Code
HSN Heading
7318
Screws, bolts, nuts & washers of iron/steel
Plain / Flat Washer
7318 22 00
Non-threaded: other washers
Spring / Conical Washer
7318 21 00
Non-threaded: spring & lock washers
GST Rate
18%
Standard rate on stainless steel washers
Need A Custom SS 347H Washer Size Or Type?Share your drawing – get a factory-price quote within 24 hours.
Reliable UNS S34709 Flat Washers Kept Ready in Ex Stock with Size Chart and PMI Tested Certification for Direct Stockist Orders
UNS S34709 Fender Washers Size Chart
Certified Stainless Steel 347H Washers Supplier in India offering ASME and DIN size charts
| Screw Size | Inner Ø (d1 min) | Outer Ø (d2 max) | Thickness (s) |
|---|---|---|---|
| M4 | 4.3 | 9 | 0.8 |
| M12 | 13.0 | 24 | 2.5 |
| M16 | 17.0 | 30 | 3.0 |
| M20 | 21.0 | 37 | 3.0 |
| M24 | 25.0 | 44 | 4.0 |
| M8 | 8.4 | 16 | 1.6 |
| M10 | 10.5 | 20 | 2.0 |
| M5 | 5.3 | 10 | 1.0 |
| M6 | 6.4 | 12 | 1.6 |
SUS 347H Plain Washers Weight Chart
| Screw Size | Weight / Pc (g) | Approx Pcs / Kg |
|---|---|---|
| M4 | 0.31 | ~3226 |
| M8 | 1.86 | ~538 |
| M10 | 3.64 | ~275 |
| M5 | 0.45 | ~2222 |
| M6 | 1.04 | ~962 |
| M12 | 6.39 | ~156 |
| M16 | 11.52 | ~87 |
| M20 | 17.49 | ~57 |
Get A Live SS 347H Washer Quote TodayFactory price, ready stock on standard sizes, and no minimum order penalty on repeat buyers.
Specifying For A Creep-Duty Refinery Project?Send your BOQ – factory price, MTC 3.1, dispatch same week.
Types Of SS 347H Washers
Top Stainless Steel 347H Washers Manufacturer in India making various types
SS 347H Fender Washers
Wide OD
UNS S34709 Flat Washers
ISO 7089
EN 1.4961 Spring Washers
DIN 127
ASTM 347H Lock Washers
Twisted Tooth
AISI 347H Sealing Washers
Bonded Seal
SS 347H Plain Washers
ASME B18.22.1
SUS 347H Conical Washers
DIN 6796
Stainless Steel S34709 Countersunk Washers
UNS S34709
EN 1.4961 Square Washers Chemical Composition
ChromiumCr
17.00–19.00%
NickelNi
9.00–13.00%
Niobium + TantalumNb+Ta
8xC min–1.10%
CarbonC
0.04–0.10%
ManganeseMn
≤ 2.00%
SiliconSi
≤ 0.75%
PhosphorusP
≤ 0.045%
SulphurS
≤ 0.030%
IronFe
Balance
Stainless Steel 347H Washers Weekly Delivery To The Following Countries
| Export To Countries | Continent | Shipping Time | Ports |
|---|---|---|---|
| Netherlands | Europe | 30 Days | Harlingen |
| Kuwait | Asia | 10 Days | Mina Al Ahmadi |
| Egypt | Africa | 18 Days | Alexandria |
Monthly Delivery Of Stainless Steel 347H Washers To Below Countries
| Export To Countries | Continent | Shipping Time | Ports |
|---|---|---|---|
| Qatar | Asia | 7 Days | Mesaieed |
| Oman | Asia | 5 Days | Duqm |
Buying In Bulk For A Superheater Or Boiler Line?Send your BOQ – factory price, MTC 3.1, dispatch same week.
SS 347H Washers Vs SS 347 Washers
SS 347 Washers
- Carbon: ≤ 0.08%
- Max Operating Temp: Up to 815°C
- Annealing Temperature: Min 1095°C
- Fits general high-temperature duty
SS 347H Washers
- Carbon: 0.04% – 0.10%
- Max Operating Temp: Up to 538°C
- Annealing Temperature: Min 1040°C
- Built for sustained elevated-temp code duty
INOX 347H Lock Washers Manufacturing Process
In-House Forging & Cold Forming
Heat-Wise Batch Traceability
Same-Week Dispatch On Stock Sizes
In-Plant Quality Control Lab
Direct Factory Pricing, No Middleman
Mumbai Port Proximity For Faster Export
Sourcing Directly From The Factory?Skip the trader margin – talk to the manufacturer today.
SUS 347H Star Washers Mechanical Properties
Tensile Strength
≥ 515 MPa
Load Bearing
Yield Strength (0.2%)
≥ 205 MPa
Design Limit
Elongation (50mm)
≥ 35%
Ductility
Hardness
≤ 201 HB / 92 HRB
Wear Resistance
Get A Live SS 347H Washer Quote TodayFactory price, ready stock on standard sizes, and no minimum order penalty on repeat buyers.
AISI 347H Sealing Washers Material Testing
Trusted Stainless Steel 347H Washers Supplier in India with Hardness and PMI testing.
PMI Testing
Confirms grade & niobium content on every production lot
Stress-Rupture Verification
Checks sustained-heat creep behaviour against ASME Sec II Part D
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
Need Mill Test Certificates With Your Order?Every dispatch ships with EN 10204 3.1 documentation.
Certification Of Stainless Steel 347H Square Washers
Mill Test Certificate 3.1
Every Stainless Steel 347H Washer dispatch travels with an EN 10204 3.1 Mill Test Certificate, matched to the original heat number and cross-checked against ASTM A240 chemistry and mechanical limits before it leaves our Mumbai facility.
UNS S34709 Flat Washers Packaging
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 INOX 347H Split Washers
Creep-Rated Refinery & Petrochemical Piping
Power Generation Boiler & Superheater Supports
Long-Cycle Furnace & Reformer Equipment
Heavy-Wall Pressure Vessels Under Sustained Heat
Turbine & Combustion Chamber Fittings
Welded Exhaust & Expansion Systems
Aerospace & High-Temperature Fittings
Chemical Processing Reactor Components
Frequently Asked Questions
What makes SS 347H Washer different from SS 347 Washer?
Both use niobium stabilization, but 347H’s controlled 0.04-0.10% carbon provides the long-term creep and rupture strength required for continuous high-heat equipment.
What does the “H” in 347H actually mean?
The “H” grade features higher, controlled carbon for long-term strength under continuous high heat, as required by design codes.
Is SS 347H Washer magnetic?
No. Annealed SS 347H washers are non-magnetic due to their austenitic structure, though heavy cold working can induce slight magnetism.
We Collaborate With Traders In The Following Locations
| Continents | Country |
|---|---|
| Africa | Nigeria, Egypt, South Africa, Kenya, Ghana, Ethiopia |
| South America | Brazil, Argentina, Colombia, Chile, Peru |
| Asia | India, Japan, South Korea, Indonesia, Saudi Arabia, Iran |
| Europe | Germany, France, UK, Italy, Spain, Poland, Ukraine |
| Australia | New Zealand, Papua New Guinea, Fiji, Samoa |
| North America | United States, Canada, Mexico, Cuba |
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