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Zeron 100 Nuts Manufacturer & Exporter in India

Explore Zeron 100 Nuts Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-196

Min Temp

870

Max Temp

🌡

870

Suitable for continuous service up to approximately 870°C under typical operating conditions.

⚡

620

Typical tensile strength around 620 MPa depending on product form and heat treatment.

🛡

Very Good

Very Good corrosion resistance in a wide range of industrial environments.

⚖

8

Typical density is approximately 8.0 g/cm³.

Product Overview

What are Zeron 100 Nuts?

Zeron 100 nuts are high-performance super duplex stainless steel fasteners manufactured from UNS S32760 bar stock, conforming to ASTM A276 and ASTM A479. With a balanced austenite-ferrite microstructure and alloying additions of 25% chromium, 3.6% molybdenum, and 0.7% tungsten, Zeron 100 nuts deliver exceptional resistance to pitting, crevice, and stress corrosion cracking in aggressive chloride and sour service environments.

With a PREN (Pitting Resistance Equivalent Number) of 40+, Zeron 100 nuts are specified for subsea, offshore, and chemical processing applications where standard duplex or 316 stainless steel fasteners fail. All nuts are supplied with full traceability and EN 10204 3.1/3.2 certification for critical bolted joints.

Quick Specifications

MaterialZeron 100 (Super Duplex Stainless Steel)
UNS NumberS32760
DIN Number1.4501
Material StandardASTM A276 / ASTM A479
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 Strength750 MPa (109 ksi) min
Yield Strength550 MPa (80 ksi) min
HardnessMax 28 HRC / 290 HB
? All material certified by NABL-accredited laboratory. PMI and ferrite content verification available on request.

Complete the Fastener Set

Other Zeron 100 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Zeron 100 fastener range from certified super duplex stainless steel bar stock, including Zeron 100 Bolts, Zeron 100 Screws, Zeron 100 Washers, Zeron 100 Studs, and Zeron 100 Threaded Rods. All Zeron 100 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Zeron 100 Bolts
Zeron 100 Screws
Zeron 100 Washers
Zeron 100 Studs
Zeron 100 Threaded Rods

Technical Data

Zeron 100 Nuts Dimensions, Sizes & Thread Standards

Zeron 100 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 patterns available. Inch dimensions per ASME B18.2.2. All Zeron 100 nuts dimensions are verified against applicable DIN, ISO, and ASME B18 standards before

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 898-2Mechanical propertiesMetric
NORSOK M-650Qualification of manufacturersAll
Material StandardRequirement
ASTM A276Bar/rod - UNS S32760
ASTM A479Forged bar - UNS S32760
NACE MR0175Sour service =28 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Zeron 100 Chemical Composition

Zeron 100 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 A276 / ASTM A479

ElementComposition (%)
Chromium (Cr)24.0-26.0%
Nickel (Ni)6.0-8.0%
Molybdenum (Mo)3.0-4.0%
Tungsten (W)0.5-1.0%
Copper (Cu)0.5-1.0%
Nitrogen (N)0.2-0.3%
Silicon (Si)1.0% max
Manganese (Mn)1.0% max
Carbon (C)0.03% max
Phosphorus (P)0.035% max
Sulphur (S)0.01% max
Iron (Fe)Balance
? All heats verified by NABL-accredited spectrometry. PMI and ferrite content verification available on request.

Why Zeron 100 Alloy Composition Matters for Nuts

Cr (24–26%) + Mo (3–4%) + W (0.5–1%) — Pitting & Crevice Resistance
The high chromium, molybdenum, and tungsten content gives Zeron 100 nuts a PREN >40, ensuring outstanding resistance to pitting and crevice corrosion in seawater and chloride-laden environments, even under nut bearing faces.
N (0.2–0.3%) — Strength & SCC Resistance
Nitrogen increases yield strength and improves resistance to stress corrosion cracking, making Zeron 100 nuts ideal for sour service and high-pressure bolted joints.
Balanced Duplex Structure
The austenite-ferrite balance ensures high mechanical strength and toughness, while maintaining corrosion resistance after welding or hot forging of nuts.

Fastener Performance

Zeron 100 Nuts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Zeron 100 Nuts per ASTM. Zeron 100 nuts achieve 620 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)
M1211045
M1627090
M20540140
M24950200
M301900320
M363200460
M425000650
M487500900
?? Anti-galling: Use molybdenum disulphide or nickel-based anti-seize. Lubricated values assume K=0.16. Avoid copper-based anti-seize in chloride or seawater service.

Industry Applications

Zeron 100 Nuts Applications — Industries & End Uses

Zeron 100 Nuts from RealBolt are specified across subsea oil and gas, FPSOs, desalination, and offshore where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Zeron 100 nuts are specified for subsea Christmas tree assemblies, BOP stacks, and topside process piping flanges where high chloride and H2S resistance is critical. NACE MR0175 compliant and Shell DEP listed for sour service bolted joints.
Used in splash zone and submerged bolted connections, riser clamps, and structural joints on offshore platforms. Zeron 100 nuts prevent pitting and crevice corrosion under nut faces in seawater immersion.
Flange and vessel closure nuts for phosphoric acid, caustic, and mixed halide process lines where 316L and standard duplex fail. Suitable for TEMA heat exchanger channel covers and pressure vessel nozzles.
Specified for high-pressure RO vessel flanges, seawater intake screens, and brine discharge piping. Zeron 100 nuts maintain integrity in high-chloride, high-pressure environments.

Zeron 100 Nuts Standards & International Certifications

Zeron 100 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 Zeron 100 Nuts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Zeron 100 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
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Answers for Buyers

Zeron 100 Nuts — Frequently Asked Questions

Browse expert answers to common questions about Zeron 100 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 Zeron 100 nuts selection and pricing.
Zeron 100 hex nuts are available to DIN 934 (metric), ISO 4032, and ASME B18.2.2 (inch hex and heavy hex). Custom heavy hex, jam, and slotted nut patterns can be supplied. Thread forms include ISO metric, UNC, UNF, and special threads on request.
Use molybdenum disulphide or nickel-based anti-seize (such as Molykote P-37 or Jet-Lube Pure Nickel) on Zeron 100 nuts. Avoid copper-based anti-seize in seawater or chloride service to prevent galvanic corrosion. Lubricated torque values should be reduced by 15-20% compared to dry assembly.
Yes – Zeron 100 nuts have a PREN >40 and are fully resistant to pitting, crevice, and chloride stress corrosion cracking in seawater and sour (H2S) environments. They are NACE MR0175/ISO 15156 compliant and specified for offshore, subsea, and chemical plant bolted joints.
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 at 50, 200, and 500 pieces.

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