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Incoloy 825 Threaded Rods Manufacturer & Exporter in India

Explore Incoloy 825 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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-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 Incoloy 825 Threaded Rods?

Incoloy 825 threaded rods are high-performance nickel-iron-chromium alloy fasteners manufactured from UNS N08825 bar stock in accordance with ASTM B425. The alloy’s balanced composition of nickel (38-46%), chromium (19.5-23.5%), and molybdenum (2.5-3.5%) provides exceptional resistance to both reducing and oxidizing acids, including sulfuric and phosphoric acid, as well as chloride-induced stress corrosion cracking.

Incoloy 825 threaded rods are widely specified for use in chemical processing, oil & gas, and pollution control equipment where superior corrosion resistance and mechanical strength are required at temperatures up to 540°C. All rods are supplied with full traceability and EN 10204 3.1 certification.

Quick Specifications

MaterialIncoloy 825
UNS NumberN08825
DIN Number2.4858
Material StandardASTM B425
Rod Standard (Metric)DIN 975 / DIN 976 / ISO 898-1
Rod Standard (Inch)ASME B18.31.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength585 MPa (85 ksi) min
Yield Strength220 MPa (32 ksi) min
HardnessMax 22 HRC / 180 HB
? All material certified by NABL-accredited laboratory. PMI and full traceability available on request.

Complete the Fastener Set

Other Incoloy 825 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Incoloy 825 fastener range from certified iron-nickel-chromium alloy bar stock, including Incoloy 825 Bolts, Incoloy 825 Nuts, Incoloy 825 Screws, Incoloy 825 Washers, and Incoloy 825 Studs. All Incoloy 825 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Incoloy 825 Bolts
Incoloy 825 Nuts
Incoloy 825 Screws
Incoloy 825 Washers
Incoloy 825 Studs

Technical Data

Incoloy 825 Threaded Rods Dimensions, Sizes & Thread Standards

Incoloy 825 Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 975 (full thread) / DIN 976 (studs) / ISO 898-1. Custom lengths available in 10mm increments. Inch sizes per ASME B18.31.3. All Incoloy 825 threaded rods dimensions are verified against applicable DIN, ISO, and

Threaded Rod Dimensions - Metric (DIN 975)

Size (M)Pitch (mm)Rod Dia (mm)Standard Length (mm)Custom Length (mm)
M61.06.01000 / 200050-3000
M81.258.01000 / 200050-3000
M101.510.01000 / 200050-3000
M121.7512.01000 / 200050-3000
M162.016.01000 / 200050-3000
M202.520.01000 / 200050-3000
M243.024.01000 / 200050-3000
M303.530.01000 / 200050-3000
M364.036.01000 / 200050-3000
M424.542.01000 / 2000100-3000
M485.048.01000 / 2000100-3000
M565.556.01000 / 2000100-3000
M646.064.01000 / 2000100-3000

Dimensional & Material Standards

StandardCoversThread
DIN 975Threaded rods, full threadMetric
DIN 976Stud bolts, double endMetric
ISO 898-1Mechanical propertiesMetric
ASME B18.31.3Threaded rods, inchUNC/UNF
ASME B16.5Stud bolts for flangesUNC
Material StandardRequirement
ASTM B425Bar/rod - UNS N08825
ASTM F468Fastener mechanical
NACE MR0175Sour service =22 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Incoloy 825 Chemical Composition

Incoloy 825 Threaded Rods are produced from an iron-nickel-chromium alloy with controlled nickel (30–46%), chromium (19–23%), and molybdenum content per ASTM. Nickel and chromium together resist high-temperature oxidation to 1093°C in 800H grades, while molybdenum and copper additions in Incoloy 825 provide sulfuric and phosphoric acid resistance.

Chemical Composition per ASTM B425

ElementComposition (%)
Nickel (Ni)38.0-46.0%
Chromium (Cr)19.5-23.5%
Iron (Fe)22.0% min
Molybdenum (Mo)2.5-3.5%
Copper (Cu)1.5-3.0%
Titanium (Ti)0.6-1.2%
Aluminium (Al)0.2% max
Carbon (C)0.05% max
Manganese (Mn)1.0% max
Silicon (Si)0.5% max
Sulfur (S)0.03% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Incoloy 825 Alloy Composition Matters for Threaded Rods

Ni (38–46%) — Acid Resistance
High nickel content ensures resistance to both reducing and oxidizing acids, making Incoloy 825 threaded rods ideal for sulfuric and phosphoric acid environments in chemical plants.
Cr (19.5–23.5%) & Mo (2.5–3.5%) — Pitting & Crevice Corrosion Protection
Chromium and molybdenum provide robust protection against localized corrosion, especially in chloride-bearing solutions and seawater applications.
Cu (1.5–3.0%) & Ti (0.6–1.2%) — Stress Corrosion Cracking Resistance
Copper and titanium additions enhance resistance to stress corrosion cracking and intergranular attack, critical for threaded rods in high-stress, high-temperature assemblies.

Fastener Performance

Incoloy 825 Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Incoloy 825 Threaded Rods per ASTM. Incoloy 825 threaded rods achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Rod SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12655225
M1616012855
M2032025688
M24540432128
M301080864204
M3618801504297
M4230002400410
M4844503560540
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or equivalent). Lubricated values assume K=0.15. Do not use copper-based anti-seize on nickel alloys.

Industry Applications

Incoloy 825 Threaded Rods Applications — Industries & End Uses

Incoloy 825 Threaded Rods from RealBolt are specified across petrochemical furnaces, chemical processing, nuclear, and power generation where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Incoloy 825 threaded rods are the preferred choice for bolted connections in sulfuric acid, phosphoric acid, and nitric acid process equipment, including reactor vessels, acid storage tanks, and piping supports. Their resistance to both oxidizing and reducing acids ensures long service life in aggressive chemical environments.
Used for flange connections, pipe supports, and structural assemblies in oil & gas production, especially in sour gas (H2S) environments. Incoloy 825 threaded rods meet NACE MR0175 requirements and are specified for offshore platforms, subsea manifolds, and topside process modules.
Ideal for seawater intake structures, brine concentrators, and desalination plant hardware. The alloy’s resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-rich environments makes it suitable for continuous immersion and splash zone applications.
Threaded rods for flue gas desulfurization (FGD) absorber towers, scrubber internals, and stack gas reheater assemblies. Incoloy 825 maintains mechanical integrity and corrosion resistance in high-chloride, acidic condensate, and elevated temperature conditions.

Incoloy 825 Threaded Rods Standards & International Certifications

Incoloy 825 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 Incoloy 825 Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Incoloy 825 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.
022-6743-7972
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Answers for Buyers

Incoloy 825 Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about Incoloy 825 Threaded Rods from RealBolt — covering grade differences, ASTM B408/B425 standards, oxidation limits, acid resistance, sizes, and MTC documentation. Contact our technical team directly for project-specific guidance on Incoloy 825 threaded rods selection and pricing.
Incoloy 825 threaded rods are available in ISO metric (DIN 975/976), UNC/UNF (ASME B18.31.3), and custom thread forms such as BSW, BSF, and Whitworth. Special threads and lengths can be produced to order with a typical lead time of 2-3 weeks.
Nickel-based anti-seize (such as Molykote P-37 or Jet-Lube Pure Nickel) is recommended for Incoloy 825 threaded rods to prevent galling and facilitate disassembly. Avoid copper-based or zinc-based anti-seize, as these can cause galvanic corrosion with nickel alloys.
Yes – Incoloy 825 is specifically designed for resistance to sulfuric acid at all concentrations up to boiling point. It is widely used for threaded fasteners in acid plant piping, tanks, and process equipment where stainless steel would fail.
No MOQ for standard sizes (M10-M36) held in stock – single rods can be supplied for urgent requirements. Custom diameters or cut lengths typically require a 10 kg minimum. Price breaks are available at 25, 100, and 250 rods.

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