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Incoloy 800HT Threaded Rods Manufacturer & Exporter in India

Explore Incoloy 800HT 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 800HT Threaded Rods?

Incoloy 800HT threaded rods are high-temperature nickel-iron-chromium alloy fasteners manufactured from UNS N08811 bar stock in accordance with ASTM B408. The alloy’s enhanced carbon (0.06-0.10%) and aluminum/titanium content provide superior creep and rupture strength at elevated temperatures, making these rods ideal for critical bolted joints in heat-intensive environments.

With excellent resistance to oxidation, carburization, and sulfidation up to 1100°C, Incoloy 800HT threaded rods are specified for furnace fixtures, petrochemical reformers, and power plant hardware where standard stainless steels fail. All rods are supplied with full traceability and EN 10204 3.1 certification.

Quick Specifications

MaterialIncoloy 800HT
UNS NumberN08811
DIN Number1.4959 / 1.4876
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 Strength600 MPa (87 ksi) min
Yield Strength275 MPa (40 ksi) min
HardnessMax 95 HRB / 200 HB
? All material certified by NABL-accredited laboratory. PMI and grain size verification available on request.

Complete the Fastener Set

Other Incoloy 800HT Fastener Products Available from RealBolt

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

Technical Data

Incoloy 800HT Threaded Rods Dimensions, Sizes & Thread Standards

Incoloy 800HT 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 cut lengths available in 10mm increments. Inch sizes per ASME B18.31.3. All Incoloy 800HT threaded rods dimensions conform to applicable DIN, ISO, and ASME B18 standards.

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
ASME B18.31.3Threaded rods, inchUNC/UNF
ISO 898-1Mechanical propertiesMetric
Material StandardRequirement
ASTM B408Bar/rod - UNS N08811
ASTM B564Forged fastener components
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Incoloy 800HT Chemical Composition

Incoloy 800HT 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)0.06-0.10
Aluminum (Al)0.25-0.60
Titanium (Ti)0.25-0.60
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 and grain size verification available on request.

Why Incoloy 800HT Alloy Composition Matters for Threaded Rods

Al + Ti (0.25–0.60% each) — Creep Strength
The combined aluminum and titanium content in Incoloy 800HT forms a stable gamma prime phase, significantly improving creep and rupture strength at temperatures above 600°C, making these rods reliable for high-temperature bolted joints.
Low Carbon (0.06–0.10%) — Intergranular Corrosion Resistance
The controlled carbon content minimizes carbide precipitation during welding or prolonged exposure to high temperatures, ensuring resistance to intergranular attack and maintaining mechanical integrity.
High Nickel & Chromium — Oxidation & Carburization Resistance
Nickel and chromium provide excellent resistance to oxidation, carburization, and sulfidation, allowing Incoloy 800HT threaded rods to perform in aggressive furnace and petrochemical atmospheres.

Fastener Performance

Incoloy 800HT Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Incoloy 800HT Threaded Rods per ASTM. Incoloy 800HT 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)
M12705628
M1617013656
M2034027288
M24600480128
M301200960204
M3621001680294
M4234002720410
M4851004080550
?? 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 Incoloy alloys.

Industry Applications

Incoloy 800HT Threaded Rods Applications — Industries & End Uses

Incoloy 800HT 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 800HT threaded rods are the preferred choice for tube sheet assemblies, radiant coil supports, and structural bolting in steam reformers, ethylene crackers, and ammonia plants. Their high creep strength and oxidation resistance ensure reliable performance in continuous operation above 700°C.
Used for bolting in superheater headers, HRSG ductwork, and boiler tube supports where thermal cycling and high-temperature corrosion are severe. Incoloy 800HT rods maintain mechanical integrity and resist embrittlement in high-pressure steam environments.
Threaded rods for furnace fixtures, trays, and jigs in carburizing, nitriding, and annealing furnaces. The alloy’s stability at elevated temperatures prevents distortion and scaling, extending fixture life and reducing maintenance.
Specified for bolted joints in gas turbine exhaust frames, expansion joints, and ducting where resistance to thermal fatigue and oxidation at 900-1100°C is critical. Incoloy 800HT rods outperform stainless steels in these demanding applications.

Incoloy 800HT Threaded Rods Standards & International Certifications

Incoloy 800HT 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 LabEN 10204 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified Incoloy 800HT 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

Incoloy 800HT Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about Incoloy 800HT 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 800HT threaded rods selection and pricing.
Incoloy 800HT threaded rods are available to DIN 975 (full thread metric), DIN 976 (studs), and ASME B18.31.3 (inch). Custom thread forms such as UNC, UNF, BSW, and BSF can be supplied on request. All rods are manufactured from ASTM B408 UNS N08811 bar with full traceability and EN 10204 3.1 certification.
Always use a nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) on Incoloy 800HT threads to prevent galling and seizing at high temperatures. Do not use 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 800HT threaded rods are engineered for continuous service up to 1100°C. Their high creep and rupture strength, combined with resistance to oxidation and carburization, make them ideal for furnace, reformer, and superheater bolting where standard stainless steels fail.
No MOQ for standard metric sizes (M10-M36) held in stock – single rods can be supplied for urgent maintenance. Custom diameters or cut lengths have a minimum order of 10 kg. Price breaks are available at 25, 100, and 250 rods. All orders include full certification.

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