Why Buyers Pick Ganpat Industrial For Alloy Steel Washers ?
Cr-Mo Grades Matched
Washers cut from B7, B7M and B16 chemistry to pair with your studs.
Hardened To Your Spec
Quenched and tempered to your hardness, including 38-45 HRC on request.
Sour-Service Ready
B7M-grade washers are held to 235 HBW max for sour duty.
Custom Drawing Work
Send ID, OD and thickness. We punch, turn or forge to match.
Inspection Backed
EN 10204 3.1 certificates and third-party inspection reports are available.
Alloy Steel Washers At A Glance
- 1Product Range: Flat, Round, Lock, Spring, Split, Sealing, Slot, Conical, Star, Square Washers & more
- 2Size Range: M3 – M56, plus custom ID, OD & thickness on drawing
- 3Grades: ASTM A193 / ASME SA193 B7, B7M & B16 chemistry
- 4Standards: ISO 7089, DIN 125, DIN 9021, ASME B18.21.1, ASTM F436
- 5Surface Finish: Plain, Zinc Plated, Hot-Dip Galvanised, Phosphate, PTFE
- 6Certification: EN 10204 3.1, 3.2 & Third-Party Inspection Reports
Ganpat Industrial supplies Alloy Steel Washers cut from certified Cr-Mo bar and strip. Choose an Alloy Steel Flat Washer to spread bolt load across the joint face. Alloy Lock Washers keep nuts tight where vibration tries to loosen the joint. An AS Spring Washer adds axial tension that helps hold clamp load steady. Alloy Steel Conical Washer styles suit joints that see heat cycles and thermal movement. Alloy Steel Star Washers bite into softer mating faces to resist turning. An AS Spherical Washer corrects angled bolt faces in automotive and heavy assemblies. An Alloy Steel Fender Washer covers oversize holes with a wide bearing surface. Our Chrome Moly Punched Washer is blanked to your ID, OD and thickness. Each ASTM A193 Alloy Steel Machine Washer lot is heat-traceable and inspected before dispatch.
Mumbai · Alloy Steel Washers Manufacturer, Stockist & Exporter
We supply durable Alloy Steel Washers for heavy-duty structural bolting needs.
Ganpat Industrial Corporation, Mumbai, has made and stocked steel fasteners since 1997. We supply Cr-Mo alloy steel washers in flat, lock, spring, conical and special styles. Each order can ship with test certificates and third-party inspection reports.
- ✓Since 1997
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
High Tensile Strength ASTM A193 Alloy Steel Flat Washers Supplier in India with Third-Party Inspection Reports
Specification Of Alloy Steel Washers
Alloy Steel Washer Sizes
- Bore sizes M3 to M56
- Inch sizes on request
- ID, OD & thickness to drawing
- Sample-matched production
Governing Grade Standard
- ASTM A193 / ASME SA193
- Grades B7, B7M & B16
- ASTM F436 hardness on request
- ASTM F844 general-use washers
Washer Dimension Standards
- ISO 7089 / DIN 125
- DIN 9021 / ISO 7093
- ASME B18.21.1
- IS, JIS & BS on request
Manufacturing Route
- Punched from Cr-Mo strip
- Turned on precision lathe
- Hot or cold forged
- Quenched & tempered
Hardness Options
- 38-45 HRC, F436 style
- 35 HRC max, B7 grade
- 235 HBW max, B7M grade
- Custom hardness on order
Finish Options
- Plain or oiled
- Zinc plated
- Hot-dip galvanised
- Phosphate, PTFE or Xylan
AS Spherical Washer Deliver Superior Strength and Heat Resistance for Automotive Industry
Alloy Steel Flat Washer Size Chart – M3 To M36
| Bolt Size | Inner Dia (ID) mm | Outer Dia (OD) mm | Thickness 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 | 24 | 2.5 |
| M14 | 15 | 28 | 2.5 |
| M16 | 17 | 30 | 3.0 |
| M18 | 19 | 34 | 3.0 |
| M20 | 21 | 37 | 3.0 |
| M22 | 23 | 39 | 3.0 |
| M24 | 25 | 44 | 4.0 |
| M27 | 28 | 50 | 4.0 |
| M30 | 31 | 56 | 4.0 |
| M36 | 37 | 66 | 5.0 |
Have A Special Washer Drawing?Send the sketch or sample details and get a priced offer.
Which Alloy Steel Washer Suits Your Joint ?
A leading Alloy Steel Washers supplier in India stocks sizes for heavy industrial fastening.
Spread The Load
Alloy Steel Flat Washer and AS Round Washer protect the joint face.
Cover Oversize Holes
An Alloy Steel Fender Washer has an OD near three times its ID.
Fight Vibration
Alloy Lock Washers and an AS Spring Washer add tension against loosening.
Hold Preload
An Alloy Steel Conical Washer keeps clamp load through heat and vibration.
Grip Soft Faces
Alloy Steel Star Washers bite into aluminium or plastic to resist turning.
Seal The Joint
AS Sealing Washers close leak paths at plugs and fittings.
Fix Angle Errors
An AS Spherical Washer with conical seats corrects angled bolt faces.
Adjust The Fit
Alloy Steel Slot Washers let you shift position without full disassembly.
Bear On Timber
Alloy Steel Square Washers spread the load across timber joints.
Types Of Alloy Steel Washers
Eight key washer styles, all cut or formed from Cr-Mo alloy steel.
Alloy Steel Flat Washer
ISO 7089 / DIN 125
AS Spring Washer
DIN 128 A
Alloy Lock Washers
DIN 127 B
Alloy Steel Conical Washer
DIN 6796
Alloy Steel Belleville Washer
DIN 2093 / EN 16983
Alloy Steel Wave Washer
DIN 137 B
Alloy Steel Fender Washer
DIN 9021 / ISO 7093
AS Sealing Washers
DIN 7603
B7 Vs B7M Alloy Steel Washers – Which To Order ?
B7 Grade Washer
- General high-temperature and high-pressure bolting
- Tensile 860 MPa min, up to M64
- Hardness 321 HBW or 35 HRC max
- Tempered at 593°C minimum
- Pairs with A194 2H nuts
B7M Grade Washer
- Sour service under NACE MR0175 / ISO 15156
- Tensile 690 MPa min, up to M100
- Hardness 235 HBW or 99 HRB max
- Tempered at 620°C minimum
- Pairs with A194 2HM nuts
Unsure Between B7, B7M And B16?Share your service and temperature. We will suggest the grade.
Chemical Composition Of A193 Chrome Moly Wire Spring
| Element | B7 / B7M | B16 |
|---|---|---|
| Carbon (C) | 0.38 – 0.48 | 0.36 – 0.47 |
| Manganese (Mn) | 0.75 – 1.00 | 0.45 – 0.70 |
| Phosphorus (P) | 0.035 max | 0.035 max |
| Sulfur (S) | 0.040 max | 0.040 max |
| Silicon (Si) | 0.15 – 0.35 | 0.15 – 0.35 |
| Chromium (Cr) | 0.80 – 1.10 | 0.80 – 1.15 |
| Molybdenum (Mo) | 0.15 – 0.25 | 0.50 – 0.65 |
| Vanadium (V) | – | 0.25 – 0.35 |
| Aluminium (Al) | – | 0.015 max |
Mechanical Properties Of ASTM A193 Chrome Moly Split Washer
An Alloy Steel Washers supplier in India provides fully tested and certified bolting components.
| Grade | Size Range | Tensile MPa min | Yield MPa min | Elongation % min | Reduction Of Area % min | Hardness max | Temper °C min |
|---|---|---|---|---|---|---|---|
| B7 | Up to M64 | 860 | 720 | 16 | 50 | 321 HBW / 35 HRC | 593 |
| B7M | Up to M100 | 690 | 550 | 18 | 50 | 235 HBW / 99 HRB | 620 |
| B16 | Up to M64 | 860 | 725 | 18 | 50 | 321 HBW / 35 HRC | 650 |
B7 Tensile Strength
≥ 860 MPa
Sizes up to M64
B7 Yield Strength
≥ 720 MPa
0.2 percent offset
B7M Max Hardness
235 HBW / 99 HRB
Sour service grade
F436 Washer Hardness
38-45 HRC
Through-hardened, when specified
Alloy Steel Slot Washers Equivalent Grades
ASTM / UNS / AISI
- ASTM A193 Grade B7
- ASME SA193 B7
- AISI 4140 / 4142
- UNS G41400
JIS
- SCM440
DIN / EN
- 42CrMo4
- WNr 1.7225
- EN 10083-3
Weekly Delivery of Copper Tube in Below Countries
| Export to | Country | Shipping time | Continent | Port |
|---|---|---|---|---|
| Qatar | 7 | Asia | Doha Port | |
| USA | 40-60 | North America | Port of Savannah |
Quench & Temper Route For Alloy Steel Conical Washer
Bar Or Strip Selection
Cr-Mo stock is checked against B7, B7M or B16 chemistry.
Blank, Punch Or Turn
Washers are formed to your ID, OD and thickness.
Quench In Liquid
Parts are heated and quenched in a liquid medium.
Temper To Grade
B7 tempers at 593°C min, B7M at 620°C, B16 at 650°C.
Hardness Check
Every lot is tested against the hardness limit ordered.
Surface Coating Options For Alloy Steel Star Washers
Coatings are applied only when your order specifies them.
Zinc Plated
- ASTM B633 electroplated zinc
- ASTM F1941 for fasteners
- Thin, clean finish
Hot-Dip Galvanised
- ASTM F2329 for washers
- ASTM A153 for hardware
- Thick outdoor protection
Mechanical Zinc
- ASTM B695 coating
- Suits hardened washers
- Thickness class as per order
Phosphate & Oil
- Dark, oil-holding surface
- Light corrosion cover
- Good for indoor assembly
PTFE / Xylan Dry-Film
- Low-friction coating
- Eases torque on assembly
- Also aids repeat assembly
Cadmium On Request
- ASTM B766 electrodeposited
- Only when specified
- Confirm local restrictions
Plating Hardened Washers?Hydrogen embrittlement control is needed after plating. ASTM F1940 verifies the process.
Testing Methods For Alloy Steel Square Washers
Each batch is checked before it is dispatched from Mumbai.
Hardness Testing
Rockwell or Brinell readings confirm the ordered hardness window.
Spectro Chemical Analysis
Cr, Mo, Mn and C are read against the grade.
PMI Testing
Positive Material Identification confirms the alloy before dispatch.
Mechanical Testing
Tensile and yield values trace back to the parent heat.
Dimensional Inspection
ID, OD and thickness are gauged against your drawing.
Third-Party Inspection
An independent inspector can witness tests and sign the report.
Documentation & Test Certificates Of A193 Punched Washers
A premier Alloy Steel Washers manufacturer in India produces high-strength components for secure joints.
Mill Test Certificate EN 10204 3.1
Chemical and mechanical results linked to the heat
With Supply
EN 10204 3.2 & Third-Party Report
Independent witness of tests, signed by the inspector
On Request
Raw Material Report & Traceability
Bar or strip origin linked to every washer lot
On Request
Heat Treatment Chart
Quench and temper record for the lot supplied
On Request
NACE MR0175 Compliance Certificate
Hardness proof for B7M sour-service washers
On Request
Packing List & Commercial Invoice
Weights, marks, numbers and HS code included
With Supply
Certificate Of Origin
Customs support, attested through chamber or embassy on request
Export Orders
Fumigation Certificate
Issued for wooden pallet dispatches
Export Orders
Need Third-Party Inspection On Your Order?Name your inspection agency and we will plan the visit.
Applications Of Chrome Moly Punched Washer
Alloy Steel Washers ship into these sectors for high-load bolted joints.
Automotive Assemblies
Aerospace Hardware
Oil & Gas Piping
Petrochemical Plants
Power Generation
Boilers & Heat Exchangers
Chemical Processing
Shipbuilding
Fertilizer Plants
Sugar Mills
Cement Plants
Construction & Heavy Machinery
Copper Tube Monthly Delivery in Below Countries
| Export to | Country | Shipping time | Continent | Port |
|---|---|---|---|---|
| Spain | 30 | Europe | Barcelona Port | |
| Italy | 30 | Europe | Genoa port |
HSN Code For Alloy Steel Washers
Flat, Fender & Other Washers
7318 22
Other washers of iron or steel
Spring, Lock & Split Washers
7318 21
Spring washers and other lock washers
Tariff Chapter
Chapter 73
Articles of iron or steel
Alloy Steel Washers Packing & Export Handling
Inner Packing
Washers are packed in bins or small boxes as you specify.
Corrugated Cartons
Cartons carry size, grade and order marks.
Euro Pallets
Export cartons are stacked on Euro-size wooden pallets.
Pallet Finishing
Pallets get fumigation, stretch wrap, strapping and labels before dispatch.
Frequently Asked Questions
What is the difference between B7 and B7M alloy steel washers?
B7M is held to 235 HBW or 99 HRB max for sour service. B7 allows up to 321 HBW.
Which standard covers Alloy Steel Star Washers dimensions?
ISO 7089 and DIN 125 cover metric sizes. ASME B18.21.1 covers inch sizes. ASTM F436 covers hardened washers.
Can you make Alloy Steel Slot Washers to a custom drawing?
Yes. Send ID, OD, thickness, grade and hardness. We punch, turn or forge to match.
Do you arrange third-party inspection reports?
Yes. Third-party inspection reports are available alongside EN 10204 3.1 certificates.
What HSN code applies to Alloy Steel Flat Washer?
Flat and other washers fall under HSN 7318 22. Spring and lock washers fall under 7318 21.
Associate Traders and Importers available in Below Locations For Quick Deliveries
| Trading City | Trading City |
|---|---|
| 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