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Super Duplex 2507 Studs Manufacturer & Exporter in India

Explore Super Duplex 2507 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.

⚡

850

Typical tensile strength around 850 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 Super Duplex 2507 Studs?

Super Duplex 2507 studs are high-strength, corrosion-resistant fasteners manufactured from UNS S32750/S32760 bar stock, conforming to ASTM A276 and ASTM A479. These studs feature a dual-phase microstructure (austenite and ferrite) that delivers exceptional resistance to chloride-induced pitting, crevice corrosion, and stress corrosion cracking, even in aggressive seawater and chemical process environments.

With a PREN (Pitting Resistance Equivalent Number) of =41, Super Duplex 2507 studs are the industry standard for critical bolted joints in offshore, petrochemical, and desalination applications where standard stainless steels fail. They are NACE MR0175/ISO 15156 compliant for sour service and are widely specified for flange connections, pressure vessels, and heat exchangers exposed to high chloride and hydrogen sulfide concentrations.

Quick Specifications

MaterialSuper Duplex 2507
UNS NumberS32750 / S32760
DIN Number1.4410
Material StandardASTM A276 / ASTM A479
Stud Standard (Metric)DIN 976 / DIN 975 / ISO 898-1
Stud Standard (Inch)ASME B16.5 / B18.31.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength800 MPa (116 ksi) min
Yield Strength550 MPa (80 ksi) min
HardnessMax 32 HRC / 300 HB
? All material certified by NABL-accredited laboratory. PMI and ferrite content verification available on request.

Complete the Fastener Set

Other Super Duplex 2507 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Super Duplex 2507 fastener range from certified super duplex stainless steel bar stock, including Super Duplex 2507 Bolts, Super Duplex 2507 Nuts, Super Duplex 2507 Screws, Super Duplex 2507 Washers, and Super Duplex 2507 Threaded Rods. All Super Duplex 2507 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Super Duplex 2507 Bolts
Super Duplex 2507 Nuts
Super Duplex 2507 Screws
Super Duplex 2507 Washers
Super Duplex 2507 Threaded Rods

Technical Data

Super Duplex 2507 Studs Dimensions, Sizes & Thread Standards

Super Duplex 2507 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (fully threaded) / DIN 975 (threaded rod) / ASME B16.5 (flange studs). Custom cut lengths available in 5mm increments. Inch dimensions per ASME B18.31.2.

Stud Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.0Full202000
M81.25Full202000
M101.5Full202000
M121.75Full252000
M162.0Full302000
M202.5Full352000
M243.0Full402000
M303.5Full502000
M364.0Full602000
M424.5Full702000
M485.0Full802000
M565.5Full902000
M646.0Full1002000
M726.0Full1102000
M806.0Full1202000
M1006.0Full1402000

Dimensional & Material Standards

StandardCoversThread
DIN 976Fully threaded studsMetric
DIN 975Threaded rodsMetric
ASME B16.5Stud bolts for flangesUNC
ASME B18.31.2Continuous thread studsUNC/UNF
ISO 898-1Mechanical propertiesMetric
Material StandardRequirement
ASTM A276Bar/rod - UNS S32750/S32760
ASTM A479Fastener mechanical
NACE MR0175Sour service =32 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Super Duplex 2507 Chemical Composition

Super Duplex 2507 Studs are manufactured from a high-alloy ferritic-austenitic steel containing chromium (24–26%), molybdenum (3.5–5%), and nitrogen (0.24–0.32%) per ASTM. These precise elemental limits produce PREN ≥ 40 — confirming seawater pitting immunity — and deliver the 550 MPa minimum yield strength required for NORSOK M-630 subsea qualification.

Chemical Composition per ASTM A276/A479

ElementComposition (%)
Chromium (Cr)24.0-26.0
Nickel (Ni)6.0-8.0
Molybdenum (Mo)3.0-5.0
Nitrogen (N)0.24-0.32
Manganese (Mn)1.2 max
Silicon (Si)0.8 max
Carbon (C)0.030 max
Phosphorus (P)0.035 max
Sulphur (S)0.020 max
Iron (Fe)Balance
? All heats verified by NABL-accredited spectrometry. Ferrite content (40-60%) and PMI available on request.

Why Super Duplex 2507 Alloy Composition Matters for Studs

High Chromium & Molybdenum — Pitting & Crevice Resistance
The elevated Cr (24–26%) and Mo (3–5%) content gives Super Duplex 2507 studs a PREN =41, ensuring outstanding resistance to pitting and crevice corrosion in seawater, brine, and chloride-rich process streams.
Nitrogen Addition — Strength & SCC Resistance
Nitrogen (0.24–0.32%) increases yield strength and enhances resistance to chloride stress corrosion cracking, making these studs ideal for high-pressure, high-chloride environments.
Balanced Ferrite-Austenite Structure
A 40–60% ferrite phase ensures high mechanical strength and toughness, while maintaining corrosion resistance after welding or hot bolting operations.

Fastener Performance

Super Duplex 2507 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Super Duplex 2507 Studs per ASTM. Super Duplex 2507 studs achieve 850 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)
M121108838
M1627021685
M20540432138
M24900720200
M3018001440320
M3631002480470
M4249003920670
M4873005840930
?? Anti-galling: Use molybdenum-based or PTFE anti-seize. Lubricated values assume K=0.15. Avoid copper-based anti-seize in chloride service.

Industry Applications

Super Duplex 2507 Studs Applications — Industries & End Uses

Super Duplex 2507 Studs from RealBolt are specified across subsea oil and gas, FPSOs, desalination, and offshore where excellent corrosion resistance and 850 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Super Duplex 2507 studs and nuts are the default for ASME B16.5/B16.47 flange connections, riser systems, and subsea manifolds in offshore oil & gas. NORSOK M-650 and NACE MR0175 compliant for H2S and high-chloride service.
Studs for high-pressure reverse osmosis (RO) vessels, seawater intake structures, and evaporator flange joints where resistance to chloride pitting and crevice corrosion is critical for long-term reliability.
Flange stud sets for heat exchangers, pressure vessels, and reactor closures in hydrochloric acid, caustic, and mixed chloride process streams where 316L and 904L fail.
Studs for propeller shaft couplings, hull penetrations, and seawater cooling systems where high strength and immunity to seawater corrosion are required.

Super Duplex 2507 Studs Standards & International Certifications

Super Duplex 2507 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 Super Duplex 2507 Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Super Duplex 2507 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
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Answers for Buyers

Super Duplex 2507 Studs — Frequently Asked Questions

Browse expert answers to common questions about Super Duplex 2507 Studs from RealBolt — covering PREN ≥ 40, NORSOK M-630, NACE MR0175, ASTM A182 F53/F55, sizes, and EN 10204 3.2 third-party documentation. Contact our technical team directly for project-specific guidance on Super Duplex 2507 studs selection and pricing.
Super Duplex 2507 studs are available to DIN 976 (fully threaded metric), DIN 975 (threaded rod), ASME B16.5 (flange studs), and ASME B18.31.2 (inch continuous thread). Custom thread forms (BSW, BSF, Whitworth, BSPP) and cut lengths are available on request with 2-3 week lead time.
Use molybdenum-based or PTFE anti-seize compound (such as Molykote 1000 or Loctite LB 8009) on threads and nut faces. Avoid copper-based anti-seize in chloride-rich environments to prevent galvanic corrosion. Lubricated torque values assume K=0.15.
Yes – Super Duplex 2507 has a PREN =41 and is highly resistant to pitting, crevice, and stress corrosion cracking in seawater, brine, and high-chloride process streams. It is the preferred material for offshore, desalination, and marine applications where 316L and 904L fail.
No formal MOQ for standard sizes (M12-M36) held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes and cut lengths have an MOQ of 10 kg. Flange stud sets are supplied by the set with no minimum. Quantity price breaks at 50 pcs, 200 pcs, 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