+912267437972

+919022636025

enquiry@real-bolt.com

Contact Us

Incoloy 800 Studs Manufacturer & Exporter in India

Explore Incoloy 800 Studs Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
Request a Quote
View Products

-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 800 Studs?

Incoloy 800 studs are high-temperature nickel-iron-chromium alloy fasteners manufactured from UNS N08800 bar stock in accordance with ASTM B408. Designed for exceptional resistance to oxidation, carburization, and sulfidation at elevated temperatures, Incoloy 800 studs maintain mechanical integrity and dimensional stability up to 800°C. Their balanced composition of nickel (30-35%), chromium (19-23%), and iron (39.5% min) ensures excellent performance in aggressive thermal cycling and corrosive process environments.

Incoloy 800 studs are widely specified for petrochemical heater tube sheets, heat exchanger channel covers, and refinery process piping where standard stainless steels fail due to embrittlement or scaling. They are compliant with NACE MR0175/ISO 15156 for sour gas service and are available with full EN 10204 3.1/3.2 certification.

Quick Specifications

MaterialIncoloy 800
UNS NumberN08800
DIN Number1.4876
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-M100 / ¼"-4"
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 and intergranular corrosion test available on request.

Complete the Fastener Set

Other Incoloy 800 Fastener Products Available from RealBolt

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

Technical Data

Incoloy 800 Studs Dimensions, Sizes & Thread Standards

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

Stud Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Stud Length (mm)Thread Length (mm)
M61.020-2000Full
M81.2520-2000Full
M101.520-3000Full
M121.7520-3000Full
M162.030-3000Full
M202.540-3000Full
M243.050-3000Full
M303.560-3000Full
M364.080-3000Full
M424.5100-3000Full
M485.0120-3000Full
M565.5140-3000Full
M646.0160-3000Full
M726.0180-3000Full
M806.0200-3000Full
M1006.0250-3000Full

Dimensional & Material Standards

StandardCoversThread
DIN 976Stud bolts, full threadMetric
DIN 975Threaded rod, 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 N08800
ASTM B564Forged fastener stock
ASTM F468Fastener mechanical
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Incoloy 800 Chemical Composition

Incoloy 800 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)0.10% max
Aluminium (Al)0.15-0.60%
Titanium (Ti)0.15-0.60%
Manganese (Mn)1.5% max
Silicon (Si)1.0% max
Copper (Cu)0.75% max
Sulfur (S)0.015% max
? All heats verified by NABL-accredited spectrometry. PMI and grain size verification available on request.

Why Incoloy 800 Alloy Composition Matters for Studs

High Nickel (30–35%) — Thermal Stability
Nickel content ensures Incoloy 800 studs retain ductility and resist embrittlement during long-term exposure to temperatures up to 800°C, making them ideal for heater and reformer applications.
Cr (19–23%) — Oxidation & Carburization Resistance
Chromium provides a stable oxide layer, protecting stud surfaces from scaling and carburization in high-temperature, carbon-rich atmospheres such as furnace and ethylene cracker service.
Al + Ti — Grain Structure Control
Aluminium and titanium additions stabilize the austenitic structure, preventing grain growth and maintaining mechanical properties after repeated thermal cycling.

Fastener Performance

Incoloy 800 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Incoloy 800 Studs per ASTM. Incoloy 800 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)
M12554422
M1613510841
M2027021665
M2447037694
M30940752151
M3616301304219
M4226002080302
M4838603088406
?? Anti-galling: Use nickel-graphite or molybdenum-based anti-seize. Lubricated values assume K=0.16. Avoid copper-based anti-seize on Incoloy alloys.

Industry Applications

Incoloy 800 Studs Applications — Industries & End Uses

Incoloy 800 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 800 studs are the preferred choice for tube sheet and channel cover bolting in fired heaters, reformers, and ethylene crackers. Their resistance to oxidation and carburization at high temperatures ensures reliable service in hydrogen, methane, and process gas atmospheres.
Studs for superheater header connections, HRSG ductwork, and steam generator flange joints where thermal cycling and high-temperature oxidation would degrade stainless steel or carbon steel fasteners.
Used for bolting in nitric acid, urea, and ammonium nitrate reactors, Incoloy 800 studs provide resistance to stress corrosion cracking and intergranular attack in aggressive chemical environments.
Stud bolt sets for shell and tube heat exchanger channel covers, pressure vessel closures, and process piping flanges where temperature stability and corrosion resistance are critical.

Incoloy 800 Studs Standards & International Certifications

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

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

Answers for Buyers

Incoloy 800 Studs — Frequently Asked Questions

Browse expert answers to common questions about Incoloy 800 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 800 studs selection and pricing.
Incoloy 800 stud bolts are available to DIN 976 (metric full thread), DIN 975 (threaded rod), ASME B16.5 (flange studs), and ASME B18.31.2 (inch continuous thread). Custom thread forms such as BSW, BSF, and Whitworth can be supplied on request. All studs are manufactured from ASTM B408 UNS N08800 bar with full traceability.
Use nickel-graphite or molybdenum-based anti-seize compound (such as Jet-Lube Nikal or Molykote P-37) on Incoloy 800 studs. Apply to threads and nut faces to prevent galling and facilitate disassembly after high-temperature service. Avoid copper-based anti-seize to prevent galvanic corrosion.
Yes – Incoloy 800 studs are specifically designed for high-temperature service up to 800°C and offer excellent resistance to oxidation, carburization, and sulfidation. They are widely used in fired heaters, reformers, and ethylene crackers where carbon-rich atmospheres are present.
No formal MOQ for standard sizes (M12-M36) held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes or non-standard thread forms may require a 10 kg minimum. Quantity price breaks are available 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