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Incoloy 800 Screws Manufacturer & Exporter in India

Explore Incoloy 800 Screws 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 800 Screws?

Incoloy 800 screws 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 screws maintain structural integrity and mechanical strength up to 800°C. Their balanced composition of nickel (30-35%), chromium (19-23%), and iron (39.5% min) ensures excellent performance in thermal cycling and aggressive chemical environments.

These screws are widely specified for heat exchanger tube sheets, furnace hardware, and petrochemical process equipment where standard stainless steels fail due to embrittlement or scaling. Incoloy 800 screws are available in a full range of metric and inch thread forms, with full traceability and certification to international standards.

Quick Specifications

MaterialIncoloy 800
UNS NumberN08800
DIN Number1.4876
Material StandardASTM B408
Screw Standard (Metric)DIN 912 / DIN 933 / ISO 4762
Screw Standard (Inch)ASME B18.3 / B18.2.1
Thread FormISO Metric / UNC / UNF
Diameter RangeM3-M64 / ?"-2½"
Tensile Strength450 MPa (65 ksi) min
Yield Strength205 MPa (30 ksi) min
HardnessMax 85 HRB / 180 HB
? All material certified by NABL-accredited laboratory. PMI 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 Washers, Incoloy 800 Studs, 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 Washers
Incoloy 800 Studs
Incoloy 800 Threaded Rods

Technical Data

Incoloy 800 Screws Dimensions, Sizes & Thread Standards

Incoloy 800 Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 912 (socket head cap), DIN 933 (hex full thread), ISO 4762. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.3 and B18.2.1. All Incoloy 800 screws dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Socket Head Cap Screw Dimensions - Metric (DIN 912 / ISO 4762)

Size (M)Pitch (mm)Head Dia (mm)Head Ht (mm)Hex Socket (mm)Min L (mm)Max L (mm)
M30.55.53.02.5660
M61.0106.05.010200
M81.25138.06.012250
M101.51610.08.016300
M121.751812.010.020400
M162.02416.014.025500
M202.53020.017.030600
M243.03624.019.040600
M303.54530.022.050800
M364.05436.027.0601000
M424.56342.032.0801000
M485.07248.036.01001200
M565.58456.041.01201500
M646.09664.046.01402000

Dimensional & Material Standards

StandardCoversThread
DIN 912Socket head cap screwsMetric
DIN 933Hex screws, full threadMetric
ISO 4762Socket head cap screwsMetric
ISO 4017Hex head screws, fullMetric
ASME B18.3Socket cap screwsUNC/UNF
ASME B18.2.1Hex screwsUNC/UNF
Material StandardRequirement
ASTM B408Bar/rod - UNS N08800
ASTM F468Fastener mechanical
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Incoloy 800 Chemical Composition

Incoloy 800 Screws 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
Sulfur (S)0.015 max
Copper (Cu)0.75 max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Incoloy 800 Alloy Composition Matters for Screws

High Nickel Content (30–35%) — Thermal Stability
Nickel ensures Incoloy 800 screws retain ductility and strength at temperatures up to 800°C, resisting embrittlement and creep in furnace and heat exchanger applications.
Chromium (19–23%) — Oxidation & Carburization Resistance
Chromium provides a stable oxide layer, protecting screws from scaling and carburization in high-temperature, carbon-rich environments such as petrochemical reformers.
Al + Ti Stabilization
Aluminium and titanium additions prevent sensitization and intergranular corrosion, ensuring long-term reliability in cyclic thermal service and welded assemblies.

Fastener Performance

Incoloy 800 Screws Mechanical Properties & Torque Reference

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

Screw SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M61087.5
M8252014
M10504022
M12856832
M1621016863
M2042033698
M24730584141
M3014601168225
?? 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 800 Screws Applications — Industries & End Uses

Incoloy 800 Screws 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 screws are the preferred choice for furnace hardware, tube sheets, and radiant coil supports in ethylene crackers, reformers, and hydrogen production units. Their resistance to carburization and oxidation at high temperatures ensures long service life in cyclic thermal environments.
Used for superheater header connections, HRSG ductwork, and boiler tube supports, Incoloy 800 screws withstand high-temperature steam, thermal cycling, and chloride-laden condensate where stainless steel fasteners fail due to stress corrosion cracking.
Ideal for heat exchanger channel covers, reactor closures, and acid gas scrubber internals, Incoloy 800 screws provide reliable fastening in mixed acid, chloride, and sulfur-bearing environments.
Specified for heat treating baskets, jigs, and fixtures, Incoloy 800 screws maintain mechanical strength and resist scaling in continuous and batch furnaces up to 800°C.

Incoloy 800 Screws Standards & International Certifications

Incoloy 800 Screws 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 912 DIN 913 DIN 914 DIN 915 DIN 916 DIN 6912 ISO 4762 ISO 10642 ASME B18.3 EN ISO 4762 IS 1367
Certifications
ISO 9001:2015PED 2014/68/EUNABL LabMTC 3.1 / 3.2

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

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

Browse expert answers to common questions about Incoloy 800 Screws 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 screws selection and pricing.
Incoloy 800 screws are available to DIN 912 (socket head cap), DIN 933 (hex full thread), ISO 4762, ISO 4017, and ASME B18.3 (inch socket cap). Custom thread forms (UNC, UNF, BSW, BSF) and special lengths are available on request with a typical lead time of 2-3 weeks.
Nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) is recommended for Incoloy 800 screws. Apply to threads and bearing surfaces to prevent galling and facilitate disassembly. Avoid copper-based anti-seize to prevent galvanic corrosion with nickel alloys.
Yes – Incoloy 800 screws are specifically engineered for use in high-temperature furnace, reformer, and heat exchanger applications. They retain mechanical strength and resist scaling, carburization, and oxidation up to 800°C, making them ideal for cyclic thermal service.
No formal MOQ for standard sizes (M6-M24) held in stock – single-piece orders are accepted for urgent maintenance. Custom sizes or non-standard threads typically require a 10 kg minimum. Quantity discounts apply at 50, 200, and 500 pieces.

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