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Duplex 2205 Threaded Rods Manufacturer & Exporter in India

Explore Duplex 2205 Threaded Rods Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-50

Min Temp

300

Max Temp

🌡

300

Suitable for continuous service up to approximately 300°C under typical operating conditions.

⚡

800

Typical tensile strength around 800 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

7.8

Typical density is approximately 7.8 g/cm³.

Product Overview

What are Duplex 2205 Threaded Rods?

Duplex 2205 threaded rods are high-strength, corrosion-resistant fasteners manufactured from austenitic-ferritic stainless steel conforming to UNS S32205/S31803. These rods combine the benefits of both ferritic and austenitic microstructures, offering superior resistance to chloride stress corrosion cracking, pitting, and crevice corrosion compared to standard 316/304 stainless steel.

With a PREN (Pitting Resistance Equivalent Number) of 34-35, Duplex 2205 threaded rods are widely specified for use in aggressive environments such as seawater, brine, and chemical processing plants. They are supplied to ASTM A479/A276 standards and are ideal for bolted connections in offshore, marine, and chemical plant applications where both strength and corrosion resistance are critical.

Quick Specifications

MaterialDuplex Stainless Steel 2205
UNS NumberS32205 / S31803
DIN Number1.4462
Material StandardASTM A479 / ASTM A276
Rod Standard (Metric)DIN 975 / DIN 976
Rod Standard (Inch)ASME B18.31.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength620 MPa (90 ksi) min
Yield Strength450 MPa (65 ksi) min
HardnessMax 290 HB
? All material certified by NABL-accredited laboratory. PMI and ferrite content verification available on request.

Complete the Fastener Set

Other Duplex 2205 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Duplex 2205 fastener range from certified duplex stainless steel bar stock, including Duplex 2205 Bolts, Duplex 2205 Nuts, Duplex 2205 Screws, Duplex 2205 Washers, and Duplex 2205 Studs. All Duplex 2205 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Duplex 2205 Bolts
Duplex 2205 Nuts
Duplex 2205 Screws
Duplex 2205 Washers
Duplex 2205 Studs

Technical Data

Duplex 2205 Threaded Rods Dimensions, Sizes & Thread Standards

Duplex 2205 Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 975 (full thread) / DIN 976 (studs) / ASME B18.31.3. Custom lengths available in 10mm increments. Inch sizes per ASME B18.31.3. All Duplex 2205 threaded rods dimensions are verified against applicable DIN, ISO, and

Threaded Rod Dimensions - Metric (DIN 975)

Size (M)Pitch (mm)Rod Length (mm)Thread Type
M61.01000 / 2000Full Thread
M81.251000 / 2000Full Thread
M101.51000 / 2000Full Thread
M121.751000 / 2000Full Thread
M162.01000 / 2000Full Thread
M202.51000 / 2000Full Thread
M243.01000 / 2000Full Thread
M303.51000 / 2000Full Thread
M364.01000 / 2000Full Thread
M424.51000 / 2000Full Thread
M485.01000 / 2000Full Thread
M565.51000 / 2000Full Thread
M646.01000 / 2000Full Thread

Dimensional & Material Standards

StandardCoversThread
DIN 975Threaded rods, full threadMetric
DIN 976Stud bolts, double endMetric
ASME B18.31.3Threaded rods, inchUNC/UNF
ISO 898-1Mechanical propertiesMetric
Material StandardRequirement
ASTM A479Bar/rod - UNS S32205/S31803
ASTM A276Rod/round bar
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Duplex 2205 Chemical Composition

Duplex 2205 Threaded Rods are produced from a ferritic-austenitic steel with chromium (21–23%), molybdenum (3–3.5%), and nitrogen (0.14–0.20%) controlled per ASTM. Nitrogen is the critical alloying element: it simultaneously raises PREN to ≥ 35 for chloride pitting resistance and strengthens the austenite phase to achieve 450 MPa minimum yield — twice that of SS 316L.

Chemical Composition per ASTM A479

ElementComposition (%)
Chromium (Cr)21.0-23.0
Nickel (Ni)4.5-6.5
Molybdenum (Mo)2.5-3.5
Nitrogen (N)0.14-0.20
Manganese (Mn)2.0 max
Silicon (Si)1.0 max
Carbon (C)0.03 max
Phosphorus (P)0.03 max
Sulfur (S)0.02 max
Iron (Fe)Balance
? All heats verified by NABL-accredited spectrometry. PMI and ferrite content available on request.

Why Duplex 2205 Alloy Composition Matters for Threaded Rods

Cr (21–23%) & Mo (2.5–3.5%) — Pitting & Crevice Resistance
High chromium and molybdenum content gives Duplex 2205 threaded rods a PREN of 34–35, ensuring excellent resistance to pitting and crevice corrosion in seawater, brine, and chloride-rich environments.
N (0.14–0.20%) — Strength & SCC Resistance
Nitrogen increases yield strength and improves resistance to chloride stress corrosion cracking, making Duplex 2205 rods ideal for high-load, aggressive service conditions.
Balanced Ferrite-Austenite Structure
The dual-phase microstructure provides a unique combination of mechanical strength and corrosion resistance, outperforming 316L in most industrial applications.

Fastener Performance

Duplex 2205 Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Duplex 2205 Threaded Rods per ASTM. Duplex 2205 threaded rods achieve 800 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Rod SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M121008038
M1625020085
M20500400135
M24850680195
M3017001360310
M3629502360445
M4247003760610
M4870005600800
?? Anti-galling: Use molybdenum-based or PTFE anti-seize. Lubricated values assume K=0.16. Avoid copper-based anti-seize in chloride service.

Industry Applications

Duplex 2205 Threaded Rods Applications — Industries & End Uses

Duplex 2205 Threaded Rods from RealBolt are specified across offshore platforms, desalination, pulp and paper, and chemical processing where excellent corrosion resistance and 800 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Duplex 2205 threaded rods are widely used in chemical plant piping supports, reactor closures, and desalination plant structures where high chloride resistance and mechanical strength are required. They are the preferred choice for brine, caustic, and acid process environments.
Threaded rods for offshore platform bracing, splash zone supports, and marine equipment mounting where long-term resistance to seawater pitting and crevice corrosion is essential. Duplex 2205 is specified for critical bolted joints in shipbuilding and port infrastructure.
Used for bolted connections in refineries, petrochemical plants, and pipeline supports exposed to sour gas, H2S, and high-chloride process streams. Duplex 2205 rods meet NACE MR0175 requirements for sour service bolting.
Ideal for clarifier mechanisms, aeration basin hardware, and structural supports in municipal and industrial water treatment plants. Duplex 2205 rods resist corrosion in chlorinated and aerated water environments.

Duplex 2205 Threaded Rods Standards & International Certifications

Duplex 2205 Threaded Rods from RealBolt Engineering Industries are manufactured to internationally recognised fastener dimensional standards covering thread form, tolerances, strength grades, and quality requirements. Every batch ships with EN 10204 MTC 3.2 (third-party), NACE MR0175/ISO 15156, NORSOK M-630, Charpy impact certificates, and PMI (XRF) reports — available on request for all orders.
Standards
DIN 975 DIN 976-1 ASME B18.31.2 IS 1367 IS 1364 IS 12427
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Duplex 2205 Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Duplex 2205 Threaded Rods — for competitive pricing, EN 10204 MTC 3.1/3.2 documentation, and fast Mumbai dispatch. Standard sizes are ex-stock; custom dimensions accepted with 2–3 week lead time. Request your quote today.
022-6743-7972
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Answers for Buyers

Duplex 2205 Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about Duplex 2205 Threaded Rods from RealBolt — covering PREN ≥ 35, NACE MR0175, ASTM A182 F60, sigma-phase limits, sizes, and EN 10204 3.1/3.2 documentation. Contact our technical team directly for project-specific guidance on Duplex 2205 threaded rods selection and pricing.
Duplex 2205 threaded rods are supplied to DIN 975 (metric full thread), DIN 976 (studs), and ASME B18.31.3 (inch). Custom thread forms such as BSW, BSF, and Whitworth are available on request. All rods are manufactured from ASTM A479/A276 bar stock and can be supplied with EN 10204 3.1 or 3.2 certification.
Use a molybdenum-based or PTFE anti-seize compound (such as Molykote 1000 or Loctite LB 8014) for assembly. Avoid copper-based anti-seize in chloride-rich or marine environments to prevent galvanic corrosion. Always apply anti-seize to threads and nut faces to prevent galling and ensure accurate torque.
Yes – Duplex 2205 offers excellent resistance to pitting and crevice corrosion in seawater, brine, and chloride-rich environments. With a PREN of 34-35, these rods are specified for marine, desalination, and offshore applications where 316L is inadequate. No special coating is required for most marine uses.
No formal MOQ for standard sizes (M10-M36) held ex-stock – single rods can be supplied for urgent requirements. Custom diameters or cut lengths typically require a 10 kg minimum. Price breaks are available at 25, 100, and 250 rods per order.

Industrial Cities We Serve:

  • Ahmedabad
  • Aurangabad
  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
  • Hyderabad
  • Jamnagar
  • Jamshedpur
  • Ludhiana
  • Mumbai
  • Mundra
  • Mysuru
  • Nagpur
  • Nashik
  • Navi Mumbai
  • Noida
  • Pune
  • Rajkot
  • Sanand
  • Surat
  • Thane
  • Tiruppur
  • Vadodara
  • Visakhapatnam

Countries We Export To:

  • US
  • Canada
  • Mexico
  • Germany
  • UK
  • France
  • Italy
  • Spain
  • Netherlands
  • Belgium
  • Poland
  • Sweden
  • Norway
  • Denmark
  • Turkey
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
  • Nigeria
  • Australia
  • New Zealand
  • Singapore
  • Malaysia
  • Indonesia
  • Thailand
  • Vietnam
  • South Korea
  • Japan
  • Brazil