Oshwin Overseas manufactures and supplies Duplex 2205 Bolts from Mumbai, India. These bolts meet UNS S31803, UNS S32205 and DSS 2205 standards. Oshwin can produce duplex hex bolts, threaded rod, stud bolts, anchor bolts and socket head cap screws as per drawing to ASTM A182 F51/F60.
All sizes are available in full metric range. Oshwin forges and machines every bolt in-house at its Kalamboli factory making it a trusted duplex fasteners manufacturer in India. Oshwin became a well-known name in UAE, Saudi Arabia, Qatar and the USA not just for price but for accurate material and before-time delivery.
2x Austenitic Yield Strength
65 ksi min yield lets you specify smaller, lighter bolts.
M5-M30 Ready Stock
Every batch is solution-annealed and MTC 3.1 certified before it leaves Mumbai.
(ASTM A1082)
- Grade
- UNS S32205 / S31803
- Standard
- ASTM A1082 / ASTM A276
- Size Range
- M5-M30 / ¼″-1-¼″
- Hardness
- 290 HBW max
- MTC
- EN 10204 3.1
- Lead Time
- 2-5 Days
ISO Certified Duplex 2205 Hex Bolts Manufacturer in India, Hot Forged & CNC Turned to Your Drawing
UNS S31803/S32205 Stud Bolts and Threaded Rod to ASTM A1082, Threads Rolled After Heat Treatment for Fatigue Life
Table of Contents
- Duplex 2205 Bolts Specification
- Alloy 2205 Fastener Price
- Every UNS S32205 Fastener Type We Stock - Hex Bolt to Threaded Rod
- ASTM A276 UNS S32205 Chemical Composition
- DSS 2205 Fasteners Mechanical Properties & Yield Strength
- Duplex 2205 Bolts vs Austenitic 316 Fasteners
- UNS S32205 Bolts Equivalent Grades
- Duplex 2205 Hex Bolts & Stud Dimensions
- UNS S31803 Anchor Bolts, Round Stock & Lock Nut Styles
- DSS 2205 Bolt & Nut Torque Guidance
- Duplex 2205 Bolts Corrosion Resistance in Chloride & Sour Service
- Common Alloy 2205 Bolt & Screw Enquiries We Handle
- Applications of UNS S32205 Fasteners
- UNS S32205 Bolts Value-Added Services
- UNS S31803 Fasteners Standards Compliance
Duplex 2205 Bolts Specification
Duplex 2205 work-hardens faster than austenitic stainless. Most of our stock is machined from solution-annealed bar rather than cold headed. Larger diameters and studs go through hot forging, then a re-anneal, at our Mumbai facility.
Machined from Bar
M5-M20 / 1/4″-3/4″, turned to size post-anneal
Hot Forged
M20-M30 / 3/4″-1-1/4″ & stud bolts, re-annealed after forging
Certification
EN 10204 3.1 Material Test Certificate
Compliance
NACE MR0175, PREN ≥34 on request
Service Range
Cryogenic to 600°F (315°C)
Hex Bolt Dimensions
ASME B18.2.1 — head, width-across-flats & thread length
Thread Tolerance
Coarse (UNC), Fine (UNF) & Metric ISO threads
Bolt Weight Reference
~15.65kg per 100pcs, M20x40 full-thread hex bolt
Sizes Buyers Order Most
Need a length not shown here? We machine and thread it to your drawing. Anchor bolts and round stock are made to order the same way.
Quick Turnaround Quote - send bolt type, size and standard for an ex-Mumbai price, same day.
Duplex 2205 Bolts Manufacturer in India - Mumbai, Since 1999
Every batch is solution-annealed, PREN-verified and traced to heat before it ships.
Request Quote NowAlloy 2205 Fastener Price
Nickel and molybdenum drive most of what Duplex 2205 costs. A fixed price list would be out of date within weeks. Use the table below as a rough per-piece guide while you plan your budget.
| Bolt Size | Hex Bolt (Approx.) | Stud Bolt Set (Approx.) | NACE MR0175 Verified |
|---|---|---|---|
| M8 x 25mm | US$ 2-4 / pc | — | +10-15% |
| M12 x 40mm | US$ 4-7 / pc | — | +10-15% |
| M20 x 40mm | US$ 7-11 / pc | — | +10-15% |
| 1″-8UNC x 2.5″ | — | US$ 14-20 / set | +10-15% |
These are budgeting figures only, not a live quote. A comparable M20x40 DIN 933 Duplex 2205 bolt listed on a UK retailer's site shows no published price either. Share your exact size, quantity and standard for a firm ex-Mumbai rate.
Every UNS S32205 Fastener Type We Stock - Hex Bolt to Threaded Rod
ASTM A276 UNS S32205 Chemical Composition
This is the ASTM A276 ferritic-austenitic range (Cr-Ni-Mo-N chemistry). Each production heat's exact analysis is printed on its own EN 10204 3.1 certificate.
DSS 2205 Fasteners Mechanical Properties & Yield Strength
Values shown are annealed-condition minimums per ASTM A276. Duplex 2205 does not cold-head like austenitic grades — intermediate annealing applies.
Duplex 2205 Bolts vs Austenitic 316 Fasteners
UNS S32205 Bolts Equivalent Grades
Buyers sometimes ask for ASTM F593 UNS S32205 or ASTM F593 UNS S31803. F593's standard alloy groups don't include duplex stainless steel 2205 — ASTM A1082 is the correct bolting standard. Some listings also mix up UNS S32205 F51 with UNS S32205 F60. The correct pairing is UNS S31803 F51 and UNS S32205 F60. DIN 1.4462 is the same grade as Werkstoff 1.4462.
Duplex 2205 Hex Bolts & Stud Dimensions
A hex bolt's head geometry comes from the tooling, not the alloy inside it. That's why Duplex 2205 follows the same ASME B18.2.1 numbers as a carbon-steel bolt of the same size. Our M10-M30 metric range is listed below.
| Nominal Size | Body Dia. Min (mm) | Body Dia. Max (mm) | Across Flats Min (mm) | Across Flats Max (mm) | Across Corners Min (mm) | Across Corners Max (mm) | Head Height Min (mm) | Head Height Max (mm) |
|---|---|---|---|---|---|---|---|---|
| M10 | 9.78 | 10.00 | 15.73 | 17.00 | 17.77 | 18.48 | 6.17 | 6.63 |
| M12 | 11.73 | 12.00 | 17.73 | 19.00 | 20.03 | 20.78 | 4.24 | 7.76 |
| M14 | 13.73 | 14.00 | 20.67 | 22.00 | 23.35 | 24.25 | 8.51 | 9.09 |
| M16 | 15.73 | 16.00 | 23.67 | 24.00 | 26.75 | 27.71 | 9.68 | 10.32 |
| M20 | 19.67 | 20.00 | 29.16 | 30.00 | 32.95 | 34.64 | 12.12 | 12.88 |
| M24 | 23.67 | 24.00 | 35.00 | 36.00 | 39.55 | 41.57 | 14.56 | 15.44 |
| M30 | 29.67 | 30.00 | 45.00 | 46.00 | 50.85 | 53.12 | 17.92 | 19.48 |
Need a diameter that isn't listed? We'll pull it from the same ASME B18.2.1 table on request. Studs work differently — their overall length answers to the flange rules in ASME B16.5/B16.47, not a fixed head chart.
Alloy 2205 Threaded Rod Exporter in India - Priority Cargo to Brazil, Canada & Qatar
South American and Gulf buyers get MTC 3.1 paperwork and a firm quote within one working day.
Request Export QuoteUNS S31803 Anchor Bolts, Round Stock & Lock Nut Styles
DSS 2205 Bolt & Nut Torque Guidance
The bolt-torque formula T = K × F × d works the same for Duplex 2205 as any bolting material. F is your target clamp load and d is the nominal diameter. Only the friction coefficient K changes with lubricant and surface finish.
Galling Risk
Stainless-on-stainless threads seize dry — always lubricate before assembly
Anti-Seize
Use a nickel- or copper-based anti-seize rated for stainless threads
Nut Match
Pair with same-alloy UNS S32205 nuts to avoid a galvanic mismatch
Buyer-Specified Torque
We confirm your exact clamp-load target — never a generic published figure
Duplex 2205 Bolts Corrosion Resistance in Chloride & Sour Service
Common Alloy 2205 Bolt & Screw Enquiries We Handle
Nut, double bolt & double washer sets — 6mm and 12mm diameters, Gulf process plants.
Imperial hex bolts to EXW terms — 7/8″ diameter, small batches for South American buyers.
Anchor bolts for equipment mounting — 30-piece batches for Brazilian plant assembly.
Mixed hardware kits — HHCS, hex nuts, stud bolts and round stock for Canadian fabricators.
Metric hex bolts in bulk — M10 and similar sizes, Southeast Asian buyers.
DIN 934 hex nuts — M20 batches for South African process plants.
High-volume hex bolts — bulk orders for US structural buyers.
Flat head bolts, lock nuts & fender washers — matched kits for Brazilian assembly lines.
Applications of UNS S32205 Fasteners
Oil & Gas, Offshore Platform Bolting
Chemical Processing & Storage Tanks
Desalination & Marine Engineering
Pulp & Paper Digester Equipment
Pressure Vessels & Heat Exchangers
Duplex 2205 Bolts Supplier in India with NACE MR0175 Compliance
High-yield, corrosion-resistant stock, ready for immediate dispatch.
Get Supplier QuoteUNS S32205 Bolts Value-Added Services
A bolt ex-stock rarely arrives exactly as a buyer's drawing needs it. Our Mumbai workshop handles the finishing work in-house instead of outsourcing it.
Threading
Drilling
Tapping
Turning
Chamfering
Pipe Threading
Solution Annealing
Bending
PREN Verification
UNS S31803 Fasteners Standards Compliance
SGS, BV, TUV and Lloyd's inspectors are all welcome on our floor. Every batch stays fully traceable to the standards it was ordered against.
Our Export Network
Gulf and South American buyers drive steady Duplex 2205 volume — Qatar, Brazil and Chile order regularly. Canada, Thailand, South Africa, Mexico and the USA also send frequent inquiries.
Americas
USA
Canada
Mexico
Brazil
Chile
Middle East
Qatar
UAE
Saudi Arabia
Kuwait
Oman
Europe & UK
United Kingdom
Netherlands
Germany
Turkey
Belgium
Africa
South Africa
Egypt
Nigeria
Southeast & South Asia
Thailand
Indonesia
Singapore
Malaysia
Philippines
Vietnam
South Korea
Australia
Recent Duplex 2205 Bolt Enquiries
Mumbai
Qatar
Product: Duplex 2205 Nut, Double Bolt & Double Washer Set
Size: 6x40mm (80 sets) & 12x40mm (10 sets)
Mumbai
Brazil
Product: Duplex 2205 Anchor Bolts, Equipment Mounting
Size: 30 pieces
Mumbai
Canada
Product: Duplex 2205 HHCS, Hex Nuts, Stud Bolts & Round Stock
Size: 1″-8UNC x 2.5″ and M12x1.75, mixed batch
Mumbai
Chonburi
Product: Duplex 2205 Hex Bolts, DDP Terms
Size: M10x20mm, 30 pieces
Mumbai
Cape Town
Product: DIN 934 Duplex 2205 Hex Nut, EXW Terms
Size: M20, 450 pieces
Mumbai
East Texas
Product: Duplex 2205 Bolts, Bulk Stainless Steel Order
Size: 5x8, 90,000 pieces
Delivery Estimate From Ready Stock
Ready in Mumbai
Ex-stock sizes go out within 2-5 working days
Sea Freight
Lowest cost per kg, typically 15-30 days transit
Air Freight
3-6 days when an offshore or plant deadline can't wait
Get a Firm Date
Give us your discharge port for an exact shipping date
USA20-28 daysBrazil25-35 daysQatar12-18 daysThailand16-24 daysThe ranges above assume standard ocean transit, port-to-port. Ask about air freight if a shutdown or turnaround can't wait — it lands in 3-6 days instead.
FAQs - Duplex 2205 Bolts
ASTM A1082 covers duplex bolting based on ASTM A276 bar stock. ASTM F593's standard alloy groups don't actually include duplex grades. Specify A1082 for Duplex 2205 bolts, studs and nuts.
Ex-stock from M5 to M30 metric and 1/4 inch to 1-1/4 inch. Anything bigger is made to your drawing.
S31803 and S32205 are the same family. The difference is the composition range - S32205 keeps it tighter.
Price mainly depends on nickel and molybdenum content. Size, country of origin and certification also matter. Custom sizes and small batches cost more per piece.
Oshwin Overseas ships Duplex 2205 bolts worldwide from Mumbai. Same-day quoting and EN 10204 3.1 certification come with every order.
Duplex 2205 gives about double the yield strength of 316L. Corrosion resistance is similar or better too. So you can go smaller or keep the same size for extra strength. 316L still wins on cost and ease of fabrication.
Yes. Our Duplex 2205 hex bolts, stud bolts and nuts meet NACE MR0175 for sour service. EN 10204 3.1 certification and PREN verification available on request.