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SS 2205 (Duplex) Studs Manufacturer & Exporter in India

Explore SS 2205 (Duplex) Studs 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 SS 2205 (Duplex) Studs?

SS 2205 (Duplex) studs are high-strength, corrosion-resistant fasteners manufactured from duplex stainless steel UNS S32205 bar stock, conforming to ASTM A276 and ASTM A479. The duplex microstructure, with approximately equal proportions of austenite and ferrite, provides a unique combination of high tensile strength (620 MPa min) and excellent resistance to chloride-induced pitting and stress corrosion cracking.

SS 2205 studs are widely specified for flange connections, pressure vessels, and structural assemblies in aggressive environments where standard austenitic stainless steels (such as 316L) are prone to failure. They are NACE MR0175/ISO 15156 compliant for sour service and are the industry standard for offshore, chemical, and desalination plant bolting.

Quick Specifications

MaterialDuplex Stainless Steel 2205
UNS NumberS32205 / S31803
DIN Number1.4462
Material StandardASTM A276 / ASTM A479
Stud Standard (Metric)DIN 976 / DIN 938 / ISO 898-1
Stud Standard (Inch)ASME B16.5 / ASTM A193
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength620 MPa (90 ksi) min
Yield Strength450 MPa (65 ksi) min
HardnessMax 290 HB / 31 HRC
? All material certified by NABL-accredited laboratory. PMI and ferrite content verification available on request.

Complete the Fastener Set

Other SS 2205 (Duplex) Fastener Products Available from RealBolt

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

Technical Data

SS 2205 (Duplex) Studs Dimensions, Sizes & Thread Standards

SS 2205 (Duplex) Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (full thread) / DIN 938 (reduced shank) / ASME B16.5 for flange studs. Custom lengths in 5mm increments. Inch dimensions available per ASTM A193 and ASME B16.5.

Stud Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Stud Length (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.040-2001840200
M81.2550-2502250250
M101.560-3002660300
M121.7570-4003070400
M162.080-5003880500
M202.5100-60044100600
M243.0120-60054120600
M303.5150-80066150800
M364.0180-1000781801000
M424.5200-1000902001000
M485.0220-12001022201200
M565.5250-15001142501500
M646.0280-20001262802000
M726.0320-20001383202000
M806.0360-25001503602500
M1006.0400-30001804003000

Dimensional & Material Standards

StandardCoversThread
DIN 976Full thread studsMetric
DIN 938Studs with reduced shankMetric
ASME B16.5Stud bolts for flangesUNC
ASTM A193Stud bolts, high-pressureUNC/UNF
ISO 898-1Mechanical propertiesMetric
Material StandardRequirement
ASTM A276Bar/rod - UNS S32205
ASTM A479Pressure vessel quality
NACE MR0175Sour service =31 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

SS 2205 (Duplex) Chemical Composition

SS 2205 (Duplex) Studs 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 A276 / 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
Sulphur (S)0.02% max
Iron (Fe)Balance
? All heats verified by NABL-accredited spectrometry. Ferrite content (40-60%) confirmed per ASTM E562.

Why SS 2205 (Duplex) Alloy Composition Matters for Studs

Cr (21–23%) & Mo (2.5–3.5%) — Pitting & Crevice Resistance
The high chromium and molybdenum content gives SS 2205 studs a PREN of 34+, ensuring superior resistance to pitting and crevice corrosion in chloride-rich environments such as seawater and process brines.
N (0.14–0.20%) — Strength & SCC Resistance
Nitrogen increases yield strength and enhances resistance to chloride stress corrosion cracking, making SS 2205 studs ideal for critical bolted joints in aggressive chemical and marine applications.
Balanced Duplex Structure
The dual-phase (austenite/ferrite) microstructure provides a unique combination of high mechanical strength and excellent corrosion resistance, outperforming both 316L and 904L in many industrial environments.

Fastener Performance

SS 2205 (Duplex) Studs Mechanical Properties & Torque Reference

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

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12957635
M1623018480
M20470376130
M24800640190
M3016001280310
M3628002240450
M4244003520620
M4866005280820
?? Anti-galling: Use molybdenum-based or PTFE anti-seize. Lubricated values assume K=0.15. Avoid copper-based anti-seize for chloride service.

Industry Applications

SS 2205 (Duplex) Studs Applications — Industries & End Uses

SS 2205 (Duplex) Studs 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.
SS 2205 (Duplex) studs are the industry standard for ASME B16.5/B16.47 flange connections, riser clamps, and subsea pipeline supports on offshore platforms. Their high PREN and SCC resistance ensure long-term reliability in splash zone and submerged service. NORSOK M-650 and NACE MR0175 compliant.
Studs for high-pressure RO vessel flanges, seawater intake structures, and brine recirculation piping. SS 2205 outperforms 316L in resisting pitting and crevice corrosion in chloride-rich environments, making it ideal for critical bolted joints in desalination plants.
Flange stud sets for heat exchangers, pressure vessels, and reactor closures handling organic acids, chlorides, and mixed chemical streams. SS 2205 studs provide superior mechanical strength and corrosion resistance compared to austenitic stainless steels.
Studs for digesters, bleach towers, and chemical recovery systems where resistance to chloride-induced corrosion and high mechanical loads is essential. SS 2205 is preferred for its durability and low maintenance in aggressive process environments.

SS 2205 (Duplex) Studs Standards & International Certifications

SS 2205 (Duplex) Studs 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 938 DIN 939 DIN 976-1 ASME B18.31.2 IS 1364 IS 1367 IS 12427
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy SS 2205 (Duplex) Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified SS 2205 (Duplex) Studs — 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
+91 90226 36025
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Answers for Buyers

SS 2205 (Duplex) Studs — Frequently Asked Questions

Browse expert answers to common questions about SS 2205 (Duplex) Studs 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 SS 2205 (Duplex) studs selection and pricing.
SS 2205 (Duplex) stud bolts are available to DIN 976 (full thread), DIN 938 (reduced shank), ASME B16.5 (flange studs), and ASTM A193 (inch series). Custom thread forms (BSW, BSF, Whitworth, BSPP) and special lengths are available on request with typical lead times of 2-3 weeks.
Use a molybdenum-based or PTFE anti-seize compound (such as Molykote 1000 or Loctite LB 8014) for SS 2205 studs. This prevents galling and eases disassembly. Avoid copper-based anti-seize in chloride service to prevent galvanic corrosion. Reduce torque values by 20% when lubricated.
Yes – SS 2205 (Duplex) studs have a PREN of 34+ and are highly resistant to pitting, crevice corrosion, and chloride stress corrosion cracking in seawater and brine. They are widely specified for desalination, offshore, and marine applications, outperforming 316L and 904L in these environments.
No formal MOQ for standard sizes (M12-M36) held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes and non-standard threads typically require a 10 kg minimum. Flange stud sets are supplied per set with no minimum. Quantity discounts at 50, 200, and 500 pcs.

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