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Super Duplex 2507 Nuts Manufacturer & Exporter in India

Explore Super Duplex 2507 Nuts 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 Nuts?

Super Duplex 2507 nuts are high-performance fasteners manufactured from UNS S32750 or S32760 super duplex stainless steel, conforming to ASTM A182 F53/F55. These nuts combine austenitic and ferritic microstructures, delivering exceptional strength (min 800 MPa tensile) and a PREN >40 for outstanding resistance to pitting, crevice, and stress corrosion cracking in aggressive chloride environments.

Super Duplex 2507 nuts are specified for critical bolted joints in offshore, desalination, and chemical processing applications where standard duplex or 316/904L stainless steel cannot withstand the combination of high chloride, temperature, and pressure. All nuts are supplied with full traceability and EN 10204 3.1 certification.

Quick Specifications

MaterialSuper Duplex 2507
UNS NumberS32750 / S32760
DIN Number1.4410 / 1.4501
Material StandardASTM A182 F53 / F55
Nut Standard (Metric)DIN 934 / ISO 4032
Nut Standard (Inch)ASME B18.2.2
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 testing 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 Screws, Super Duplex 2507 Washers, Super Duplex 2507 Studs, 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 Screws
Super Duplex 2507 Washers
Super Duplex 2507 Studs
Super Duplex 2507 Threaded Rods

Technical Data

Super Duplex 2507 Nuts Dimensions, Sizes & Thread Standards

Super Duplex 2507 Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 934 (hex nut) / ISO 4032. Custom thread forms and heavy hex per ASME B18.2.2. Metric and inch sizes available. All Super Duplex 2507 nuts dimensions are verified against applicable DIN, ISO, and ASME

Hex Nut Dimensions - Metric (DIN 934 / ISO 4032)

Size (M)Pitch (mm)A/F (mm)Height (mm)
M61.0105.0
M81.25136.5
M101.5178.0
M121.751910.0
M162.02413.0
M202.53016.0
M243.03619.0
M303.54624.0
M364.05529.0
M424.56534.0
M485.07538.0
M565.58545.0
M646.09551.0
M726.010558.0
M806.011564.0
M1006.014580.0

Dimensional & Material Standards

StandardCoversThread
DIN 934Hex nutsMetric
ISO 4032Hex nutsMetric
ASME B18.2.2Hex & heavy hex nutsUNC/UNF
ISO 4033Heavy hex nutsMetric
BS 1768Hex nutsBSW/BSF
Material StandardRequirement
ASTM A182 F53Forged bar - UNS S32750
ASTM A182 F55Forged bar - UNS S32760
ASTM A479Bar/rod for fasteners
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 Nuts 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 A182 F53/F55

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)0.03% max
Phosphorus (P)0.035% max
Sulphur (S)0.02% max
Iron (Fe)Balance
? All heats verified by NABL-accredited spectrometry. PMI and ferrite content testing available on request.

Why Super Duplex 2507 Alloy Composition Matters for Nuts

High Chromium & Molybdenum — Pitting & Crevice Resistance
The elevated Cr (24–26%) and Mo (3–5%) content gives Super Duplex 2507 nuts a PREN >40, ensuring immunity to pitting and crevice corrosion in seawater and high-chloride process streams, even under nut bearing faces.
Nitrogen Addition — Strength & SCC Resistance
Nitrogen increases yield strength and enhances resistance to chloride stress corrosion cracking, making these nuts ideal for high-pressure, high-temperature bolted joints in aggressive environments.
Balanced Duplex Structure
The dual-phase (austenite/ferrite) microstructure provides a unique combination of high strength and ductility, with excellent resistance to hydrogen embrittlement and sulfide stress cracking.

Fastener Performance

Super Duplex 2507 Nuts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Super Duplex 2507 Nuts per ASTM. Super Duplex 2507 nuts achieve 850 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Nut SizeRecommended Torque (Nm)Clamp Load (kN)
M129035
M1622080
M20440130
M24760190
M301500300
M362600430
M424200600
M486200800
?? Anti-galling: Use molybdenum-based or PTFE anti-seize. Lubricated values assume K=0.15. Avoid stainless-on-stainless galling by using matched Super Duplex 2507 nuts and bolts.

Industry Applications

Super Duplex 2507 Nuts Applications — Industries & End Uses

Super Duplex 2507 Nuts 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 nuts are the industry standard for subsea Christmas tree, manifold, and wellhead flange connections, as well as topside piping and pressure vessel closures exposed to high-chloride seawater and sour gas. NORSOK M-650 and NACE MR0175 compliant.
Hex nuts and heavy hex nuts for high-pressure reverse osmosis (RO) vessels, seawater intake screens, and brine concentrators where resistance to chloride-induced pitting and crevice corrosion is critical for long-term reliability.
Used in heat exchanger channel covers, reactor closures, and acid process piping where high strength and resistance to mixed acid and chloride environments are required. Outperforms 316L and 904L in aggressive media.
Super Duplex 2507 nuts secure structural steel, riser clamps, and splash zone supports on offshore platforms, FPSOs, and shipboard systems where long-term seawater immersion and cyclic loading demand maximum corrosion resistance.

Super Duplex 2507 Nuts Standards & International Certifications

Super Duplex 2507 Nuts 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 934 ISO 4032 ASME B18.2.2 EN ISO 4032 IS 1364 IS 1367 IS 12427
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified Super Duplex 2507 Nuts — 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

Super Duplex 2507 Nuts — Frequently Asked Questions

Browse expert answers to common questions about Super Duplex 2507 Nuts 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 nuts selection and pricing.
Super Duplex 2507 hex nuts are available to DIN 934 (metric), ISO 4032, ISO 4033 (heavy hex), and ASME B18.2.2 (inch hex and heavy hex). Custom thread forms such as BSW, BSF, and Whitworth can be supplied on request. All nuts are manufactured from ASTM A182 F53/F55 bar with full traceability.
Molybdenum-based or PTFE anti-seize is recommended for Super Duplex 2507 nuts to prevent galling and facilitate disassembly. Avoid copper-based anti-seize in chloride environments. Always lubricate threads and nut faces before assembly and reduce torque by 15-20% compared to dry values.
Yes – Super Duplex 2507 nuts are fully resistant to pitting, crevice, and stress corrosion cracking in seawater and sour gas (H2S) environments. They are specified in NORSOK M-650, NACE MR0175/ISO 15156, and Shell DEP for subsea and topside bolted joints. No additional coating or cathodic protection is required.
No MOQ for standard sizes (M12-M36) held in stock – single pieces can be supplied for urgent maintenance. Custom sizes or non-standard threads have a 10 kg minimum. Price breaks are available at 50, 200, and 500 pieces. All orders include EN 10204 3.1 certification.

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