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Inconel 625 Threaded Rods Manufacturer & Exporter in India

Explore Inconel 625 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

1200

Max Temp

🌡

1200

Suitable for continuous service up to approximately 1200°C under typical operating conditions.

⚡

760

Typical tensile strength around 760 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

8.4

Typical density is approximately 8.4 g/cm³.

Product Overview

What are Inconel 625 Threaded Rods?

Inconel 625 threaded rods are fully threaded fastener bars manufactured from UNS N06625 nickel-chromium-molybdenum alloy bar stock conforming to ASTM B446. The alloy achieves a minimum tensile strength of 758 MPa in the annealed condition through solid-solution strengthening provided by molybdenum (8-10%) and niobium (3.15-4.15%), eliminating the need for precipitation hardening.

With a PREN exceeding 51, Inconel 625 threaded rods resist chloride pitting, crevice corrosion, and stress corrosion cracking in seawater and aggressive chemical environments where stainless steel alternatives fail. These rods are widely specified under NACE MR0175/ISO 15156 for subsea pipeline supports, offshore structural tie rods, chemical reactor closures, and high-temperature flange assemblies across the oil and gas, marine, and chemical processing industries.

Quick Specifications

MaterialInconel 625
UNS NumberN06625
DIN Number2.4856
Material StandardASTM B446
Threaded Rod Standard (Metric)DIN 975 / DIN 976
Threaded Rod Standard (Inch)ASME B18.31.3
Thread FormISO Metric / UNC / UNF / BSPP
Diameter RangeM6-M100 / ¼"-4"
Standard Lengths1000 mm / 2000 mm / 3000 mm or custom
Tensile Strength758 MPa (110 ksi) min
Yield Strength414 MPa (60 ksi) min
HardnessMax 35 HRC / 220 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Inconel 625 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Inconel 625 fastener range from certified nickel-chromium superalloy bar stock, including Inconel 625 Bolts, Inconel 625 Nuts, Inconel 625 Screws, Inconel 625 Washers, and Inconel 625 Studs. All Inconel 625 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Inconel 625 Bolts
Inconel 625 Nuts
Inconel 625 Screws
Inconel 625 Washers
Inconel 625 Studs

Technical Data

Inconel 625 Threaded Rods Dimensions, Sizes & Thread Standards

Inconel 625 Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 975 (metric full thread) / DIN 976 (metric stud) / ASME B18.31.3 (inch). Custom lengths cut to order. Inch dimensions available per ASME B18.31.3. All Inconel 625 threaded rods dimensions conform to applicable DIN, ISO, and ASME B18 standards.

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

Size (M)Pitch (mm)Nominal Dia (mm)Root Dia (mm)Standard Length (mm)Max Custom Length (mm)
M61.06.04.7710002000
M81.258.06.4710002000
M101.510.08.1610002000
M121.7512.09.8510003000
M162.016.013.5510003000
M202.520.016.9310003000
M243.024.020.3210003000
M303.530.025.7110003000
M364.036.031.0910003000
M424.542.036.4810003000
M485.048.041.8710003000
M565.556.049.2510003000
M646.064.056.6410003000
M726.072.064.6410003000
M806.080.072.6410003000
M1006.0100.092.6410003000

Dimensional & Material Standards

StandardCoversThread
DIN 975Threaded rods, full thread, standard lengthsMetric
DIN 976-1Threaded studs, metric coarseMetric
ISO 888Bolts, screws, studs - nominal lengthsMetric
ASME B18.31.3Continuous threaded rods, inchUNC/UNF
ASME B16.5Stud bolts for pipe flangesUNC
MSS SP-75High-pressure stud bolt assembliesUNC
Material StandardRequirement
ASTM B446Bar/rod - UNS N06625
ASTM F468Fastener mechanical properties
NACE MR0175Sour service =35 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Inconel 625 Chemical Composition

Inconel 625 Threaded Rods are manufactured from a nickel-chromium superalloy containing nickel (72% min), chromium (14–17%), and iron (6–10%). Each element is precisely controlled per ASTM — nickel provides chloride SCC immunity, chromium drives high-temperature oxidation resistance, and iron balances structural stability and alloy cost.

Chemical Composition per ASTM B446

ElementComposition (%)
Nickel (Ni)58.0% min
Chromium (Cr)20.0-23.0%
Molybdenum (Mo)8.0-10.0%
Niobium + Ta (Nb+Ta)3.15-4.15%
Iron (Fe)5.0% max
Carbon (C)0.10% max
Manganese (Mn)0.50% max
Silicon (Si)0.50% max
Aluminium (Al)0.40% max
Cobalt (Co)1.0% max
Titanium (Ti)0.40% max
Phosphorus (P)0.015% max
Sulphur (S)0.015% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Inconel 625 Alloy Composition Matters for Threaded Rods

Mo (8–10%) — Thread Root Corrosion Resistance
Molybdenum raises the PREN above 51, protecting the thread root profile — the most vulnerable geometry on a threaded rod — from crevice corrosion in chloride-bearing media, seawater, and acidic process fluids. This is critical where rods are partially immersed or exposed to condensation cycles.
Nb (3.15–4.15%) — Structural Stability at Elevated Temperature
Niobium stabilises the austenitic matrix and suppresses sensitisation during thermal cycling. Inconel 625 threaded rods retain their corrosion resistance and mechanical properties after repeated heating to 980°C, making them suitable for high-temperature flange tie rods and furnace structural connections.
Solid-Solution Strengthening — No Heat Treatment Risk
Alloy 625 achieves its 758 MPa tensile strength entirely through solid-solution strengthening. Cut-to-length threaded rods do not require post-machining heat treatment, eliminating the risk of distortion or dimensional change after threading — a significant advantage over precipitation-hardened alloys.

Fastener Performance

Inconel 625 Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Inconel 625 Threaded Rods per ASTM. Inconel 625 threaded rods achieve 760 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Nut Torque Reference for Inconel 625 Threaded Rods

Rod SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12887032
M1621016877
M20420336123
M24730584178
M3014601168283
M3625402032411
M4240503240566
M4860104808744
?? Anti-galling note: Always apply nickel-based anti-seize (Molykote P-37 or equivalent) to threaded rod threads before nut assembly. Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel alloy threaded rods - galvanic incompatibility accelerates thread corrosion.

Industry Applications

Inconel 625 Threaded Rods Applications — Industries & End Uses

Inconel 625 Threaded Rods from RealBolt are specified across oil and gas, aerospace, chemical processing, and power generation where excellent corrosion resistance and 760 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Inconel 625 threaded rods are the standard specification for subsea pipeline clamp assemblies, riser support frames, and umbilical termination structures. NACE MR0175 compliant for H2S sour service environments. Specified under Shell DEP, ExxonMobil EMSP, and NORSOK MDS D47 for long-term seawater immersion without coating.
Fully threaded rods for offshore platform deck connections, splash-zone structural tie rods, marine heat exchanger frame assemblies, and mooring system hardware. PREN 51+ ensures complete immunity to pitting and crevice corrosion in seawater at ambient and elevated temperatures without cathodic protection.
Tie rod assemblies for chemical reactor pressure closures, heat exchanger shell-and-tube bundle tie rods (TEMA Class B/C), and pressure vessel saddle anchor rods in phosphoric acid, hydrofluoric acid, and mixed halide process environments where austenitic stainless steel grades are inadequate.
Threaded rod sets for flue gas desulphurisation (FGD) scrubber structural tie rods, heat recovery steam generator (HRSG) casing connections, and gas turbine exhaust duct frame assemblies where HCl-saturated gas, thermal cycling, and condensation combine to cause rapid corrosion of standard stainless steel fasteners.

Inconel 625 Threaded Rods Standards & International Certifications

Inconel 625 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, PMI (XRF), NACE MR0175/ISO 15156, and NABL-accredited lab 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 Inconel 625 Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Inconel 625 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

Inconel 625 Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about Inconel 625 Threaded Rods from RealBolt — covering ASTM standards, max service temperature, corrosion resistance, available sizes, lead times, and MTC certification. Contact our technical team directly for project-specific guidance on Inconel 625 threaded rods selection and pricing.
Inconel 625 threaded rods are manufactured to DIN 975 (metric full thread, standard lengths of 1000 mm and 2000 mm), DIN 976-1 (metric stud form), and ASME B18.31.3 for inch continuous threaded rods. Custom cut lengths are available in any increment from 50 mm to 3000 mm. Thread forms include ISO metric coarse and fine, UNC, UNF, BSW, and BSPP on request. All rods are supplied with thread tolerance class 6g per ISO 965-1.
Yes – Inconel 625 threaded rods can be cut using carbide-tipped hacksaw blades, abrasive cut-off wheels, or band saws with bi-metal blades rated for nickel alloys. Work hardening is moderate compared to austenitic stainless steel, but slow feed rates and adequate coolant are essential to avoid thread damage at the cut end. After cutting, chamfer the thread lead-in with a file or die to prevent nut cross-threading. No post-cut heat treatment is required to restore corrosion resistance.
No – carbon steel nuts must never be used with Inconel 625 threaded rods. The galvanic potential difference will cause accelerated corrosion of the carbon steel nut in wet or immersed service. Always pair Inconel 625 threaded rods with matching Inconel 625 hex nuts (ASTM B446 / ASTM F467 UNS N06625) or, where cost permits, with Alloy 825 nuts for less aggressive environments. Washer material should also be Inconel 625 or Alloy 825 to maintain galvanic compatibility.
Inconel 625 threaded rods retain useful mechanical properties up to 980°C in oxidising atmospheres. Between 650°C and 760°C, prolonged exposure can cause precipitation of secondary phases that reduce ductility – for continuous service in this range, Inconel 718 or Alloy 601 may be more appropriate. Below 650°C and above 800°C, alloy 625 performs reliably. For cryogenic applications, Inconel 625 maintains excellent toughness down to -196°C, making it suitable for LNG and liquid nitrogen service.

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  • Ahmedabad
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