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Monel 400 Threaded Rods Manufacturer & Exporter in India

Explore Monel 400 Threaded Rods Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-200

Min Temp

550

Max Temp

🌡

550

Suitable for continuous service up to approximately 550°C under typical operating conditions.

⚡

550

Typical tensile strength around 550 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

8.8

Typical density is approximately 8.8 g/cm³.

Product Overview

What are Monel 400 Threaded Rods?

Monel 400 threaded rods are nickel-copper alloy fasteners manufactured from UNS N04400 bar stock conforming to ASTM B164. The alloy’s single-phase solid-solution structure – comprising 63-70% nickel and 28-34% copper – delivers a minimum tensile strength of 480 MPa in the annealed condition with outstanding toughness retained at cryogenic temperatures.

Monel 400 threaded rods resist corrosion in hydrofluoric acid, seawater, brine, and alkaline media at a level unmatched by standard stainless steels. They are widely specified under NACE MR0175 for sour-service piping systems, marine hardware, and chemical processing equipment where long-term dimensional stability under load is critical.

Quick Specifications

MaterialMonel 400
UNS NumberN04400
DIN Number2.4360
Material StandardASTM B164
Threaded Rod Standard (Metric)DIN 975 / DIN 976
Threaded Rod Standard (Inch)ASME B18.31.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength480 MPa (70 ksi) min
Yield Strength170 MPa (25 ksi) min
HardnessMax 35 HRC / 241 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Monel 400 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Monel 400 fastener range from certified nickel-copper alloy bar stock, including Monel 400 Bolts, Monel 400 Nuts, Monel 400 Screws, Monel 400 Washers, and Monel 400 Studs. All Monel 400 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Monel 400 Bolts
Monel 400 Nuts
Monel 400 Screws
Monel 400 Washers
Monel 400 Studs

Technical Data

Monel 400 Threaded Rods Dimensions, Sizes & Thread Standards

Monel 400 Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 975 (full thread rod) / DIN 976 (stud bolt rod) / ISO 888. Custom lengths available. Inch dimensions per ASME B18.31.3. All Monel 400 threaded rods dimensions are verified against applicable DIN, ISO, and

Threaded Rod Dimensions - Metric (DIN 975 / DIN 976)

Size (M)Pitch (mm)Core Dia (mm)Stress Area (mm²)Std Length (mm)Max Length (mm)
M61.04.7720.110003000
M81.256.4736.610003000
M101.58.1658.010003000
M121.759.8584.310003000
M162.013.5515710003000
M202.516.9324510003000
M243.020.3235310003000
M303.525.7156110003000
M364.031.0981710003000
M424.536.48112010003000
M485.041.87147010003000
M565.549.25203010003000
M646.056.64268010003000
M726.064.64346010003000
M806.072.64434010003000
M1006.092.64699010003000

Dimensional & Material Standards

StandardCoversThread
DIN 975Fully threaded rod, standard lengthsMetric
DIN 976Threaded rod / stud bolt formMetric
ISO 888Bolts, screws, studs - nominal lengthsMetric
ASME B18.31.3Continuous threaded rodUNC/UNF
ASME B16.5Stud bolts for flangesUNC
MSS SP-75Stud bolts, high-pressure fittingsUNC
Material StandardRequirement
ASTM B164Bar/rod - UNS N04400
ASTM F468Fastener mechanical properties
NACE MR0175Sour service hardness compliance
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Monel 400 Chemical Composition

Monel 400 Threaded Rods are produced from a nickel-copper alloy containing 63% minimum nickel and 27–34% copper, with elemental limits certified to ASTM. The nickel base delivers seawater and HF acid immunity; copper additions enhance ductility; and in Monel K500, aluminium and titanium additions enable age-hardened strength above 896 MPa.

Chemical Composition per ASTM B164

ElementComposition (%)
Nickel (Ni)63.0% min
Copper (Cu)28.0-34.0%
Iron (Fe)2.5% max
Manganese (Mn)2.0% max
Carbon (C)0.30% max
Silicon (Si)0.50% max
Sulfur (S)0.024% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Monel 400 Alloy Composition Matters for Threaded Rods

Ni (63% min) — Corrosion Resistance in Reducing Acids
The high nickel base gives Monel 400 threaded rods exceptional resistance to hydrofluoric acid, sulfuric acid, and alkaline media. Rods maintain structural integrity in HF alkylation units where stainless steel fasteners fail rapidly through stress corrosion cracking.
Cu (28–34%) — Seawater and Brine Immunity
The nickel-copper balance produces a passive film that resists seawater corrosion, including under crevice conditions at thread roots and nut bearing faces. Monel 400 threaded rods are used in marine piping systems without additional coating or cathodic protection.
Single-Phase Solid Solution — No Sensitisation Risk
Unlike duplex or austenitic stainless steels, Monel 400 has no carbide precipitation risk during fabrication or service. Threaded rods cut from ASTM B164 bar retain full corrosion resistance at the thread roots without post-machining heat treatment.

Fastener Performance

Monel 400 Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Monel 400 Threaded Rods per ASTM. Monel 400 threaded rods achieve 550 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Tightening Torque Reference - Monel 400 Threaded Rods

Rod SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12554420
M1613010448
M2026020877
M24450360111
M30900720177
M3615601248257
M4224901992354
M4837002960465
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or equivalent). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel-copper alloys - it introduces galvanic incompatibility at the thread interface.

Industry Applications

Monel 400 Threaded Rods Applications — Industries & End Uses

Monel 400 Threaded Rods from RealBolt are specified across marine, HF alkylation, desalination, and chemical processing where excellent corrosion resistance and 550 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples. Select an industry below to see specific Monel 400 threaded rods application details and RealBolt stock availability.
Monel 400 threaded rods are the standard fastening solution for hydrofluoric acid alkylation unit piping flanges, valve bonnets, and pressure vessel closures. The alloy’s immunity to HF corrosion and compliance with NACE MR0175 make it the only practical metallic option for these environments. Specified under API 751 for HF alkylation safety.
Fully threaded rods and stud assemblies for seawater piping systems, offshore platform deck fittings, marine heat exchanger channel covers, and propeller shaft tie rods. Monel 400 resists biofouling-accelerated corrosion and crevice attack under nuts and washers in continuous seawater immersion without cathodic protection.
Threaded rod assemblies for reactor vessel closures, column internals, and heat exchanger tube sheet connections in sulfuric acid, hydrochloric acid, and caustic soda service. Monel 400 outperforms SS 316L and duplex stainless in reducing acid environments where chloride stress corrosion cracking is a concurrent risk.
Tie rods and anchor bolts for multi-stage flash (MSF) and reverse osmosis (RO) desalination plant pressure vessels, brine heater tube bundles, and evaporator shell connections. Monel 400 threaded rods maintain dimensional stability in hot brine at temperatures up to 120°C without pitting or crevice corrosion.

Monel 400 Threaded Rods Standards & International Certifications

Monel 400 Threaded Rods 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 3.1/3.2, Lloyds Register or DNV certification, NACE MR0175, and PMI (XRF) reports — available on request for all orders.
Standards
DIN 975 DIN 976-1 ASME B18.31.2 IS 1367 IS 1364
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Monel 400 Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Monel 400 Threaded Rods — 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.
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Answers for Buyers

Monel 400 Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about Monel 400 Threaded Rods from RealBolt — covering Monel 400 vs K500 selection, seawater and HF acid resistance, ASTM B164/B865, sizes, and MTC documentation. Contact our technical team directly for project-specific guidance on Monel 400 threaded rods selection and pricing.
Monel 400 threaded rods are manufactured to DIN 975 (fully threaded rod in standard 1000 mm and 2000 mm lengths), DIN 976 (stud bolt rod form with defined end configurations), and ASME B18.31.3 for inch-series continuous threaded rod. Custom cut lengths from 100 mm to 3000 mm are available in 10 mm increments. Inch sizes from ¼” to 4″ diameter are stocked in 12″ and 36″ lengths with UNC thread form as standard.
Yes – Monel 400 is one of very few metallic alloys with proven resistance to anhydrous and aqueous hydrofluoric acid across a wide concentration range. Threaded rods manufactured from ASTM B164 UNS N04400 bar are specified under API 751 for HF alkylation unit piping and vessel connections. The alloy resists both general corrosion and stress corrosion cracking in HF environments where stainless steel and carbon steel fasteners fail within weeks.
Monel 400 threaded rods should be paired with Monel 400 hex nuts (ASTM B164 / ASME SB-164) to maintain galvanic compatibility and avoid bimetallic corrosion. Heavy hex nuts per ASME B18.2.2 are recommended for flange and pressure vessel applications. If Monel nuts are unavailable, Inconel 625 nuts are an acceptable alternative. Never pair Monel 400 rods with carbon steel or standard stainless steel nuts in corrosive service – the galvanic couple will accelerate corrosion of the less noble material.
Yes – Monel 400 retains excellent toughness and ductility at cryogenic temperatures down to -196°C (liquid nitrogen temperature). The face-centred cubic (FCC) crystal structure of the nickel-copper alloy prevents the ductile-to-brittle transition seen in ferritic steels. Monel 400 threaded rods are used in LNG plant cold box tie rods, cryogenic valve bonnet studs, and liquid nitrogen storage vessel connections without impact testing requirements in most design codes.

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