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Incoloy 800H Studs Manufacturer & Exporter in India

Explore Incoloy 800H Studs 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 Studs?

Incoloy 800H studs are high-temperature nickel-iron-chromium alloy fasteners manufactured from UNS N08810 bar stock, conforming to 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 studs ideal for bolted joints exposed to prolonged thermal cycling and oxidation.

Incoloy 800H studs are specified for critical service in petrochemical, power generation, and furnace applications where standard stainless steels fail due to embrittlement or loss of strength. They are supplied with full traceability and are compliant with NACE MR0175/ISO 15156 for sour gas service.

Quick Specifications

MaterialIncoloy 800H
UNS NumberN08810
DIN Number1.4958
Material StandardASTM B408
Stud Standard (Metric)DIN 976 / DIN 975
Stud Standard (Inch)ASME B16.5 / B18.31.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M72 / ¼"-3"
Tensile Strength600 MPa (87 ksi) min
Yield Strength275 MPa (40 ksi) min
HardnessMax 85 HRB / 200 HB
? All material certified by NABL-accredited laboratory. PMI and grain size verification 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 Threaded Rods. 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 Threaded Rods

Technical Data

Incoloy 800H Studs Dimensions, Sizes & Thread Standards

Incoloy 800H Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (metric threaded rods) / DIN 975 (full thread) / ASME B16.5 (stud bolts for flanges). Custom cut lengths available. Inch dimensions per ASME B18.31.2. All Incoloy 800H studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Bolt Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Core Dia (mm)Length Range (mm)
M61.05.020-2000
M81.256.820-2000
M101.58.520-2000
M121.7510.220-2000
M162.013.620-3000
M202.517.020-3000
M243.020.420-3000
M303.526.430-3000
M364.032.440-3000
M424.538.450-3000
M485.044.460-3000
M565.552.470-3000
M646.060.480-3000
M726.068.490-3000

Dimensional & Material Standards

StandardCoversThread
DIN 976Stud bolts, full threadMetric
DIN 975Threaded rods, full threadMetric
ASME B16.5Stud bolts for flangesUNC
ASME B18.31.2Continuous thread studsUNC/UNF
ISO 898-1Mechanical propertiesMetric
Material StandardRequirement
ASTM B408Bar/rod - UNS N08810
ASTM B564Forged fasteners
ASTM F468Fastener mechanical
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Incoloy 800H Chemical Composition

Incoloy 800H Studs 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
Sulphur (S)0.015 max
Copper (Cu)0.75 max
? All heats verified by NABL-accredited spectrometry. PMI and grain size certification available on request.

Why Incoloy 800H Alloy Composition Matters for Studs

High Nickel & Chromium — Oxidation Resistance
The high nickel and chromium content in Incoloy 800H provides outstanding resistance to oxidation and carburization at temperatures up to 1100°C, ensuring stud integrity in furnace and reformer service.
Al + Ti Stabilization — Creep Strength
Aluminium and titanium additions stabilize the austenitic structure, enhancing creep and rupture strength for long-term bolted joints in high-temperature environments.
Controlled Carbon — Grain Size Control
The increased carbon content (0.05–0.10%) and controlled grain size (ASTM 5 or coarser) prevent embrittlement and maintain ductility after prolonged exposure to elevated temperatures.

Fastener Performance

Incoloy 800H Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Incoloy 800H Studs per ASTM. Incoloy 800H studs achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12705625
M1617013650
M2034027280
M24590472120
M301200960190
M3621001680275
M4233002640370
M4848003840480
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or equivalent). Lubricated values assume K=0.15. Avoid copper-based anti-seize on nickel alloys.

Industry Applications

Incoloy 800H Studs Applications — Industries & End Uses

Incoloy 800H Studs 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 studs are the preferred choice for bolted joints in fired heater manifolds, convection section supports, and radiant coil flange connections due to their resistance to oxidation and carburization at high temperatures.
Stud bolts for tube sheets, header flanges, and process piping in steam reformers and ammonia synthesis plants, where resistance to high-temperature hydrogen attack and thermal cycling is critical.
Incoloy 800H studs are used in superheater header connections, HRSG ductwork, and turbine exhaust flanges, providing reliable performance in cyclic thermal environments and resisting embrittlement.
Studs for furnace doors, muffle seals, and heat treatment baskets, where long-term exposure to 1000°C+ and rapid temperature changes demand exceptional creep strength and oxidation resistance.

Incoloy 800H Studs Standards & International Certifications

Incoloy 800H Studs 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 938 DIN 939 DIN 976-1 ASME B18.31.2 IS 1364 IS 1367
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified Incoloy 800H Studs — 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
+91 90226 36025
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Answers for Buyers

Incoloy 800H Studs — Frequently Asked Questions

Browse expert answers to common questions about Incoloy 800H Studs 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 studs selection and pricing.
Incoloy 800H stud bolts are available to DIN 976 (metric full thread), DIN 975 (threaded rods), ASME B16.5 (flange studs), and ASME B18.31.2 (inch continuous thread). Custom thread forms (BSW, BSF, Whitworth) and cut lengths are available on request with short lead times.
Nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) is recommended for Incoloy 800H studs. Apply to threads and nut faces to prevent galling. Avoid copper-based anti-seize to prevent galvanic corrosion. Reduce torque by 20% when lubricated.
Yes – Incoloy 800H studs are engineered for continuous service up to 1100°C, with excellent resistance to oxidation, carburization, and thermal cycling. They are widely specified for furnace, reformer, and heat treatment equipment worldwide.
No formal MOQ for standard sizes (M12-M36) held in stock – single pieces can be supplied for urgent maintenance. Custom sizes or cut-to-length studs have an MOQ of 10 kg. Price breaks at 50 pcs, 200 pcs, and 500 pcs.

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