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Incoloy 800H Threaded Rods Manufacturer & Exporter in India

Explore Incoloy 800H 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 800H Threaded Rods?

Incoloy 800H threaded rods are high-temperature nickel-iron-chromium alloy fasteners manufactured from UNS N08810 bar stock in accordance with ASTM B408. The alloy’s increased carbon content (0.05-0.10%) and controlled grain size provide superior creep and rupture strength above 600°C, making these rods ideal for bolted connections in heat exchangers, reformer furnaces, and petrochemical process equipment.

Incoloy 800H threaded rods offer excellent resistance to oxidation, carburization, and nitriding atmospheres, maintaining mechanical integrity in cyclic thermal environments. They are widely specified for use in refinery, power generation, and chemical plant applications where standard stainless steel fasteners fail due to high-temperature embrittlement or scaling.

Quick Specifications

MaterialIncoloy 800H
UNS NumberN08810
DIN Number1.4958
Material StandardASTM B408
Rod Standard (Metric)DIN 975 / DIN 976
Rod Standard (Inch)ASME B18.31.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength450 MPa (65 ksi) min
Yield Strength205 MPa (30 ksi) min
HardnessMax 85 HRB / 200 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Incoloy 800H Fastener Products Available from RealBolt

RealBolt also manufactures the complete Incoloy 800H fastener range from certified iron-nickel-chromium alloy bar stock, including Incoloy 800H Bolts, Incoloy 800H Nuts, Incoloy 800H Screws, Incoloy 800H Washers, and Incoloy 800H Studs. All Incoloy 800H fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Incoloy 800H Bolts
Incoloy 800H Nuts
Incoloy 800H Screws
Incoloy 800H Washers
Incoloy 800H Studs

Technical Data

Incoloy 800H Threaded Rods Dimensions, Sizes & Thread Standards

Incoloy 800H Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 975 (full thread) / DIN 976 (studs) / ASME B18.31.3. Custom lengths up to 6 meters. Inch and metric threads available. All Incoloy 800H threaded rods dimensions are verified against applicable DIN, ISO, and

Threaded Rod Dimensions - Metric (DIN 975)

Size (M)Pitch (mm)Rod Length (mm)Thread Length (mm)
M61.01000 / 2000Full
M81.251000 / 2000Full
M101.51000 / 2000Full
M121.751000 / 2000Full
M162.01000 / 2000Full
M202.51000 / 2000Full
M243.01000 / 2000Full
M303.51000 / 2000Full
M364.01000 / 2000Full
M424.51000 / 2000Full
M485.01000 / 2000Full
M565.51000 / 2000Full
M646.01000 / 2000Full

Dimensional & Material Standards

StandardCoversThread
DIN 975Threaded rods, full threadMetric
DIN 976Stud bolts, double endMetric
ASME B18.31.3Threaded rods, inchUNC/UNF
ISO 898-1Mechanical propertiesMetric
ASME B1.1Unified threadsUNC/UNF
Material StandardRequirement
ASTM B408Bar/rod - UNS N08810
ASTM B564Forged fasteners
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Incoloy 800H Chemical Composition

Incoloy 800H 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 B408

ElementComposition (%)
Nickel (Ni)30.0-35.0
Chromium (Cr)19.0-23.0
Iron (Fe)39.5 min
Carbon (C)0.05-0.10
Aluminium (Al)0.15-0.60
Titanium (Ti)0.15-0.60
Manganese (Mn)1.5 max
Silicon (Si)1.0 max
Sulfur (S)0.015 max
Copper (Cu)0.75 max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Incoloy 800H Alloy Composition Matters for Threaded Rods

High Nickel & Chromium — Oxidation Resistance
The high nickel and chromium content in Incoloy 800H ensures outstanding resistance to oxidation and scaling at temperatures up to 1100°C, making these threaded rods reliable for furnace and heat exchanger assemblies.
Al + Ti Stabilization — Creep Strength
Aluminium and titanium additions stabilize the alloy against sensitization and grain boundary embrittlement, providing superior creep and rupture strength for long-term service in high-temperature bolted joints.
Controlled Carbon — Thermal Stability
The controlled carbon range (0.05–0.10%) in 800H improves stress rupture properties and prevents grain coarsening, ensuring mechanical integrity in cyclic thermal environments.

Fastener Performance

Incoloy 800H Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Incoloy 800H Threaded Rods per ASTM. Incoloy 800H 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)
M12604822
M1615012045
M2030024070
M24520416105
M301050840170
M3618001440245
M4228502280335
M4842003360440
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel alloys.

Industry Applications

Incoloy 800H Threaded Rods Applications — Industries & End Uses

Incoloy 800H 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 800H threaded rods are the preferred choice for bolted connections in steam cracker furnaces, ethylene reformers, and radiant coil supports due to their high creep strength and resistance to carburization at elevated temperatures.
Used for bolting in superheater assemblies, heat recovery steam generator (HRSG) ductwork, and turbine exhaust systems where thermal cycling and oxidation resistance are critical for long-term reliability.
Threaded rods for heat exchanger tie rods, pressure vessel closures, and reactor internals in nitric acid, urea, and ammonia plants where resistance to nitriding and stress corrosion cracking is required.
Incoloy 800H rods are specified for bolted joints in thermal oxidizer chambers, waste incinerators, and flue gas ducting where continuous operation at 900-1100°C is standard.

Incoloy 800H Threaded Rods Standards & International Certifications

Incoloy 800H 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 9001:2015PED 2014/68/EUNABL LabMTC 3.1 / 3.2

Buy Incoloy 800H Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Incoloy 800H 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 800H Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about Incoloy 800H 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 800H threaded rods selection and pricing.
Incoloy 800H threaded rods are available in ISO metric (DIN 975/976), UNC/UNF (ASME B1.1), and custom thread forms such as BSW or BSF on request. Standard lengths are 1m and 2m, but custom cut-to-length rods up to 6m are available. Inch and metric threads can be supplied with full or partial threading as per project requirements.
Always use a nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) on threads and nut faces to prevent galling and seizing at high temperatures. Avoid copper-based anti-seize, as it can cause embrittlement and galvanic corrosion in nickel alloys. Lubricated torque values should be reduced by 20% compared to dry assembly.
Yes – Incoloy 800H is specifically engineered for high-temperature service up to 1100°C. Its high nickel and chromium content, combined with controlled carbon, ensures excellent creep and rupture strength, making it ideal for furnace, reformer, and superheater bolting where standard stainless steel rods fail.
There is no formal MOQ for standard sizes (M10-M36) held in stock – single rods can be supplied for urgent maintenance. Custom diameters or cut-to-length rods may require a 10 kg minimum. Price breaks are available at 25, 100, and 250 rods. Full traceability and MTCs are provided with every order.

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
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  • Malaysia
  • Indonesia
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  • Japan
  • Brazil