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Inconel 800 Studs Manufacturer & Exporter in India

Explore Inconel 800 Studs Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-200

Min Temp

1200

Max Temp

🌡

1200

Suitable for continuous service up to approximately 1200°C under typical operating conditions.

⚡

760

Typical tensile strength around 760 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

8.4

Typical density is approximately 8.4 g/cm³.

Product Overview

What are Inconel 800 Studs?

Inconel 800 studs are nickel-iron-chromium alloy fasteners manufactured from UNS N08800 bar stock conforming to ASTM B408. The alloy’s balanced composition of nickel (30-35%), chromium (19-23%), and iron (balance) delivers exceptional resistance to oxidation, carburization, and high-temperature corrosion in continuous service up to 816°C.

Inconel 800 studs are widely specified under ASME B16.5 and ASTM A193 equivalent standards for heat exchanger tube sheet connections, furnace flange assemblies, and petrochemical reactor closures where thermal cycling and aggressive process media demand a fastener that stainless steel cannot reliably provide. Full EN 10204 3.1 mill certification is supplied with every batch.

Quick Specifications

MaterialInconel 800
UNS NumberN08800
DIN Number1.4876
Material StandardASTM B408
Stud Standard (Metric)DIN 976-1 / ISO 888
Stud Standard (Inch)ASME B16.5 / ASME B18.31.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength517 MPa (75 ksi) min
Yield Strength207 MPa (30 ksi) min
HardnessMax 35 HRC / 192 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Inconel 800 Fastener Products Available from RealBolt

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

Technical Data

Inconel 800 Studs Dimensions, Sizes & Thread Standards

Inconel 800 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976-1 (metric fully threaded stud) / ISO 888 / ASME B16.5 (flange stud bolts). Custom lengths in 5mm increments. Inch dimensions available per ASME B18.31.2. All Inconel 800 studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Bolt Dimensions - Metric (DIN 976-1 / ISO 888)

Size (M)Pitch (mm)Shank Dia (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.06.01820200
M81.258.02225250
M101.510.02630300
M121.7512.03035400
M162.016.03845500
M202.520.04655600
M243.024.05465700
M303.530.06680900
M364.036.0781001000
M424.542.0901201200
M485.048.01021401500
M565.556.01181601800
M646.064.01341802000
M726.072.01502002200
M806.080.01662202500
M1006.0100.02002503000

Dimensional & Material Standards

StandardCoversThread
DIN 976-1Metric stud bolts, fully threadedMetric
ISO 888Bolts and studs, generalMetric
ASME B16.5Stud bolts for pipe flangesUNC
ASME B18.31.2Continuous threaded studsUNC/UNF
MSS SP-75High-pressure stud boltsUNC
ASME B16.47Large diameter flange studsUNC
Material StandardRequirement
ASTM B408Bar/rod - UNS N08800
ASTM B409Plate/sheet - UNS N08800
NACE MR0175Sour service hardness limit
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Inconel 800 Chemical Composition

Inconel 800 Studs are manufactured from a nickel-chromium superalloy containing nickel (72% min), chromium (14–17%), and iron (6–10%). Each element is precisely controlled per ASTM — nickel provides chloride SCC immunity, chromium drives high-temperature oxidation resistance, and iron balances structural stability and alloy cost.

Chemical Composition per ASTM B408

ElementComposition (%)
Nickel (Ni)30.0-35.0%
Chromium (Cr)19.0-23.0%
Iron (Fe)Balance (min 39.5%)
Carbon (C)0.10% max
Manganese (Mn)1.50% max
Silicon (Si)1.00% max
Copper (Cu)0.75% max
Aluminium (Al)0.15-0.60%
Titanium (Ti)0.15-0.60%
Sulphur (S)0.015% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Inconel 800 Alloy Composition Matters for Studs

Cr (19–23%) — Oxidation & Carburization Resistance
Chromium forms a stable, adherent oxide layer on Inconel 800 stud surfaces at elevated temperatures, preventing oxidation scaling and carburization in furnace atmospheres and reformer tube connections up to 816°C continuous service.
Ni (30–35%) — Structural Stability Under Thermal Cycling
The nickel content stabilizes the austenitic matrix and prevents sigma-phase embrittlement during repeated thermal cycling — a critical property for studs used in heat exchanger closures and fired heater flanges that experience frequent start-up and shutdown cycles.
Al + Ti (0.15–0.60% each) — Creep Resistance
Aluminium and titanium additions provide modest precipitation strengthening and significantly improve creep resistance at temperatures above 600°C, ensuring Inconel 800 studs maintain adequate clamping load in long-term high-temperature flange assemblies without stress relaxation.

Fastener Performance

Inconel 800 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Inconel 800 Studs per ASTM. Inconel 800 studs achieve 760 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Tightening Torque Reference - Inconel 800 Studs

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12625022
M1614811854
M2029523686
M24510408124
M301020816198
M3617801424288
M4228402272396
M4842103368521
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or equivalent). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel-iron alloy studs - galvanic incompatibility accelerates thread corrosion at elevated temperatures.

Industry Applications

Inconel 800 Studs Applications — Industries & End Uses

Inconel 800 Studs from RealBolt are specified across oil and gas, aerospace, chemical processing, and power generation where excellent corrosion resistance and 760 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Inconel 800 stud bolt sets are the standard specification for fired heater tube support flanges, radiant section outlet connections, and convection section duct flanges in petroleum refinery and petrochemical plant service. The alloy’s resistance to oxidation and carburization at continuous temperatures up to 816°C makes it the preferred choice over 321 and 347 stainless steel in these applications.
Full-thread and double-end studs for TEMA Class B and Class C shell-and-tube heat exchanger channel cover closures, floating head bolting, and tube sheet connections in high-temperature process service. Inconel 800 studs maintain reliable clamping load through repeated thermal cycling without the stress relaxation that affects lower-alloy fasteners.
Stud bolt sets for hydrocracker reactor closures, catalytic reformer flange connections, and pressure vessel nozzle assemblies operating in hydrogen-rich, high-temperature environments. Inconel 800 provides superior resistance to hydrogen embrittlement and nitriding compared to austenitic stainless steel grades at temperatures above 500°C.
Flange stud bolt sets for superheater outlet headers, main steam isolation valve flanges, and high-pressure feedwater heater connections in coal-fired and combined-cycle power plants. The alloy’s creep resistance and oxidation stability at steam temperatures up to 816°C ensure long service intervals between planned maintenance outages.

Inconel 800 Studs Standards & International Certifications

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

Partner with RealBolt — India’s leading manufacturer of certified Inconel 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.
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Answers for Buyers

Inconel 800 Studs — Frequently Asked Questions

Browse expert answers to common questions about Inconel 800 Studs from RealBolt — covering ASTM standards, max service temperature, corrosion resistance, available sizes, lead times, and MTC certification. Contact our technical team directly for project-specific guidance on Inconel 800 studs selection and pricing.
Inconel 800 studs are manufactured to DIN 976-1 (metric fully threaded studs), ISO 888, ASME B16.5 (flange stud bolts for pipe flanges Class 150-2500), ASME B18.31.2 (continuous threaded studs, inch series), and MSS SP-75 for high-pressure applications. Double-end studs with reduced shank are available per customer drawing. Custom thread forms including BSW, BSF, and BSPP are available with 15 working day lead time.
Inconel 800 (UNS N08800) and Inconel 800H (UNS N08810) share the same base composition but differ in carbon content and grain size. Inconel 800H has a controlled carbon content of 0.05-0.10% and a minimum grain size of ASTM No. 5, which significantly improves creep and stress rupture strength above 600°C. For stud applications in continuous high-temperature service above 650°C – such as reformer outlet flanges or superheater headers – Inconel 800H or 800HT studs are recommended over standard Inconel 800.
Yes – Inconel 800 studs perform reliably in high-temperature hydrogen service up to approximately 816°C. The alloy’s austenitic nickel-iron-chromium matrix provides inherent resistance to hydrogen embrittlement that affects ferritic and martensitic steels. Inconel 800 studs are regularly specified for hydrocracker reactor closures and catalytic reformer flange connections where hydrogen partial pressures are significant. Hardness must be maintained below 35 HRC per NACE MR0175 for sour-service hydrogen applications.
Use a nickel-based anti-seize compound such as Molykote P-37, Jet-Lube KOPR-KOTE Pure Nickel, or Bostik Never-Seez Pure Nickel Special. Apply to both threaded ends and nut bearing faces. Reduce target torque values by approximately 20% compared to dry assembly values. Avoid copper-based or zinc-based anti-seize products on nickel-iron alloy studs – the galvanic potential difference promotes accelerated corrosion, particularly at elevated service temperatures.

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  • Ahmedabad
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