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Super Duplex 2507 Screws Manufacturer & Exporter in India

Explore Super Duplex 2507 Screws 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 Screws?

Super Duplex 2507 screws are high-performance fasteners manufactured from UNS S32750 or S32760 bar stock, conforming to ASTM A479 and ASTM A182 standards. These screws combine austenitic and ferritic stainless steel microstructures, delivering exceptional strength (minimum 800 MPa tensile) and a PREN (Pitting Resistance Equivalent Number) of 41+, ensuring outstanding resistance to pitting, crevice, and stress corrosion cracking in aggressive chloride environments.

Super Duplex 2507 screws are widely specified for offshore, marine, chemical, and desalination applications where conventional stainless steels fail due to corrosion or mechanical limitations. All fasteners are supplied with full traceability and EN 10204 3.1 certification.

Quick Specifications

MaterialSuper Duplex 2507
UNS NumberS32750 / S32760
DIN Number1.4410
Material StandardASTM A479 / ASTM A182
Screw Standard (Metric)DIN 912 / DIN 7991 / ISO 4762
Screw Standard (Inch)ASME B18.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
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 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 Nuts
Super Duplex 2507 Washers
Super Duplex 2507 Studs
Super Duplex 2507 Threaded Rods

Technical Data

Super Duplex 2507 Screws Dimensions, Sizes & Thread Standards

Super Duplex 2507 Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 912 (hex socket cap), DIN 7991 (countersunk), ISO 4762 (hex socket), and ASME B18.3. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.3.

Socket Cap Screw Dimensions - Metric (DIN 912 / ISO 4762)

Size (M)Pitch (mm)Head Dia (mm)Head Ht (mm)Hex Socket (mm)Min L (mm)Max L (mm)
M61.0106.0510120
M81.25138.0612150
M101.51610.0816200
M121.751812.01020250
M162.02416.01425300
M202.53020.01730400
M243.03624.01940500
M303.54530.02250600
M364.05436.02760800
M424.56342.032801000
M485.07248.0361001200
M565.58556.0411201500
M646.09564.0461402000

Dimensional & Material Standards

StandardCoversThread
DIN 912Hex socket cap screwsMetric
DIN 7991Countersunk socket screwsMetric
ISO 4762Hex socket screwsMetric
ASME B18.3Socket cap, button, flat screwsUNC/UNF
ISO 14581Socket flat head screwsMetric
Material StandardRequirement
ASTM A479Bar/rod - UNS S32750/S32760
ASTM A182Forged 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 Screws 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 A479 / ASTM A182

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. PMI and ferrite content verification available on request.

Why Super Duplex 2507 Alloy Composition Matters for Screws

Cr (24–26%) + Mo (3–5%) — Pitting & Crevice Resistance
The high chromium and molybdenum content gives Super Duplex 2507 screws a PREN >41, ensuring immunity to pitting and crevice corrosion in seawater, brine, and aggressive chloride process streams.
N (0.24–0.32%) — Strength & SCC Resistance
Nitrogen increases yield strength and enhances resistance to chloride stress corrosion cracking, making these screws ideal for high-pressure, high-temperature, and sour service environments.
Balanced Ferrite-Austenite Structure
The dual-phase microstructure provides a unique combination of high strength and ductility, with excellent weldability and toughness even at sub-zero temperatures.

Fastener Performance

Super Duplex 2507 Screws Mechanical Properties & Torque Reference

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

Screw SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M8322518
M10645129
M121108842
M1627021685
M20530424133
M24920736192
M3018001440300
M3632002560435
?? Anti-galling: Use molybdenum-based or PTFE anti-seize. Lubricated values assume K=0.16. Avoid stainless steel-on-stainless steel galling by using proper lubrication.

Industry Applications

Super Duplex 2507 Screws Applications — Industries & End Uses

Super Duplex 2507 Screws 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 screws are specified for subsea valve actuators, wellhead control panels, and topside process skids where resistance to chloride-induced pitting and crevice corrosion is critical. NORSOK M-650 and NACE MR0175 compliant for sour service and seawater exposure.
Used in high-pressure reverse osmosis (RO) pump assemblies, brine recirculation piping, and seawater intake screens, Super Duplex 2507 screws provide long-term reliability in highly saline and chlorinated water environments.
Fasteners for heat exchanger channel covers, reactor closures, and pressure vessel nozzles in hydrochloric acid, caustic, and mixed chloride process streams where 316L and 904L fail due to corrosion or SCC.
Socket cap and countersunk screws for offshore platform handrails, splash zone supports, and marine propulsion systems where high strength and immunity to seawater pitting are required.

Super Duplex 2507 Screws Standards & International Certifications

Super Duplex 2507 Screws 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 912 DIN 913 DIN 914 DIN 915 DIN 916 ISO 4762 ISO 10642 ASME B18.3 EN ISO 4762 IS 1367 IS 12427
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified Super Duplex 2507 Screws — 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 Screws — Frequently Asked Questions

Browse expert answers to common questions about Super Duplex 2507 Screws 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 screws selection and pricing.
Super Duplex 2507 socket cap screws are available to DIN 912 (metric), ISO 4762, DIN 7991 (countersunk), and ASME B18.3 (inch series). Button head and flat head screws are also available per ISO 7380 and ISO 14581. Custom thread forms (UNC, UNF, BSW) can be supplied on request with a typical lead time of 2-3 weeks.
Use molybdenum-based or PTFE anti-seize compound (such as Molykote 1000 or Loctite LB 8014) to prevent galling and facilitate disassembly. Apply to threads and under the screw head. Avoid copper-based anti-seize in chloride-rich environments to prevent galvanic corrosion.
Yes – Super Duplex 2507 screws have a PREN >41 and are fully resistant to pitting, crevice, and stress corrosion cracking in seawater, brine, and high-chloride process streams. They are specified in NORSOK, Shell DEP, and ExxonMobil EMSP for offshore and desalination applications. No additional coating is required.
No formal MOQ for standard sizes (M8-M24) held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes or non-standard threads have an MOQ of 10 kg. 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