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Inconel 601 Bolts Manufacturer & Exporter in India

Explore Inconel 601 Bolts 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 601 Bolts?

Inconel 601 bolts are nickel-chromium-aluminium alloy fasteners manufactured from UNS N06601 bar stock conforming to ASTM B166. The alloy’s exceptional oxidation resistance stems from a tightly adherent alumina-rich oxide scale formed by aluminium (1.0-1.7%) combined with a high chromium content (21.0-25.0%), enabling continuous service at temperatures up to 1200°C.

With a nickel base of 58.0-63.0% and deliberate iron additions for structural stability, Inconel 601 bolts resist carburisation, nitriding, and cyclic thermal oxidation in furnace and combustion environments where standard stainless steel fasteners fail within weeks. These bolts are specified for high-temperature industrial furnaces, thermal processing equipment, and aerospace exhaust systems where oxidation resistance and mechanical integrity at elevated temperatures are non-negotiable.

Quick Specifications

MaterialInconel 601
UNS NumberN06601
DIN Number2.4851
Material StandardASTM B166
Bolt Standard (Metric)DIN 931 / DIN 933 / ISO 4014
Bolt Standard (Inch)ASME B18.2.1
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength550 MPa (80 ksi) min
Yield Strength205 MPa (30 ksi) min
HardnessMax 35 HRC / 200 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Inconel 601 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Inconel 601 fastener range from certified nickel-chromium superalloy bar stock, including Inconel 601 Nuts, Inconel 601 Screws, Inconel 601 Washers, Inconel 601 Studs, and Inconel 601 Threaded Rods. All Inconel 601 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Inconel 601 Nuts
Inconel 601 Screws
Inconel 601 Washers
Inconel 601 Studs
Inconel 601 Threaded Rods

Technical Data

Inconel 601 Bolts Dimensions, Sizes & Thread Standards

Inconel 601 Bolts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 931 (partial thread) / DIN 933 (full thread) / ISO 4014. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.2.1. All Inconel 601 bolts dimensions are verified against applicable DIN, ISO, and ASME

Hex Bolt Dimensions - Metric (DIN 931 / ISO 4014)

Size (M)Pitch (mm)A/F (mm)Head Ht (mm)Min L (mm)Max L (mm)
M61.0104.010200
M81.25135.312250
M101.5176.416300
M121.75197.520400
M162.02410.025500
M202.53012.530600
M243.03615.040600
M303.54618.750800
M364.05522.5601000
M424.56526.0801000
M485.07530.01001200
M565.58535.01201500
M646.09540.01402000
M726.010545.01602000
M806.011550.01802500
M1006.014563.02003000

Dimensional & Material Standards

StandardCoversThread
DIN 931Hex bolts, partial threadMetric
DIN 933Hex bolts, full threadMetric
ISO 4014Hex head screws, partialMetric
ISO 4017Hex head screws, fullMetric
ASME B18.2.1Hex & heavy hex boltsUNC/UNF
ASME B16.5Stud bolts for flangesUNC
MSS SP-75Stud bolts, high-pressureUNC
Material StandardRequirement
ASTM B166Bar/rod - UNS N06601
ASTM F468Fastener mechanical properties
AMS 5715High-temperature bar stock
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Inconel 601 Chemical Composition

Inconel 601 Bolts 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 B166

ElementComposition (%)
Nickel (Ni)58.0-63.0%
Chromium (Cr)21.0-25.0%
Iron (Fe)Remainder (approx. 14.0%)
Aluminium (Al)1.0-1.7%
Carbon (C)0.10% max
Manganese (Mn)1.0% max
Silicon (Si)0.50% max
Sulphur (S)0.015% max
Copper (Cu)1.0% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Inconel 601 Alloy Composition Matters for Bolts

Al (1.0–1.7%) — Alumina Scale Formation
Aluminium reacts preferentially with oxygen at elevated temperatures to form a dense, self-healing Al2O3 scale on the bolt surface. This scale acts as a diffusion barrier against further oxidation, enabling Inconel 601 bolts to survive continuous service at temperatures up to 1200°C without significant metal loss.
Cr (21.0–25.0%) — Carburisation & Sulphidation Resistance
The high chromium content provides a secondary Cr2O3 oxide layer that resists carburisation in carbon-rich furnace atmospheres and sulphidation in combustion gas environments. This dual-oxide protection mechanism is what separates Inconel 601 bolts from lower-chromium nickel alloys in thermal processing applications.
Fe (Remainder) — Structural Stability & Cost Efficiency
Iron as the balance element provides solid-solution strengthening at intermediate temperatures and contributes to the alloy's resistance to sigma-phase embrittlement during long-term thermal exposure — a critical consideration for bolts that remain in service for years inside industrial furnaces without scheduled replacement.

Fastener Performance

Inconel 601 Bolts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Inconel 601 Bolts per ASTM. Inconel 601 bolts achieve 760 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Indicative Tightening Torque - Inconel 601 Hex Bolts

Bolt SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12625023
M1615012055
M2029523687
M24510408126
M301020816200
M3617801424291
M4228402272400
M4842103368526
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or Bostik Never-Seez Pure Nickel). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel alloys - galvanic incompatibility accelerates thread corrosion at elevated temperatures.

Industry Applications

Inconel 601 Bolts Applications — Industries & End Uses

Inconel 601 Bolts 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 601 hex bolts and stud bolts are the standard fastener specification for radiant tube supports, furnace muffle flanges, retort closures, and roller hearth kiln structural connections. The alumina-rich oxide scale formed at operating temperatures up to 1200°C prevents bolt seizure and oxidation-induced thread failure during scheduled maintenance shutdowns.
Rotary kiln tyre bolts, calciner shell flange connections, and refractory anchor bolts in cement, lime, and alumina calcining plants are routinely specified in Inconel 601. The alloy’s resistance to cyclic thermal oxidation and carburisation in carbon-bearing kiln atmospheres eliminates the frequent bolt replacement cycles associated with stainless steel fasteners.
Flange stud bolt sets for steam methane reformer (SMR) outlet manifolds, ethylene cracker transfer line flanges, and catalytic reformer reactor closures operating above 900°C. Inconel 601 bolts maintain adequate creep strength and oxidation resistance at these temperatures where austenitic stainless grades experience accelerated scaling and stress relaxation.
Boiler flange bolts, superheater header connections, and grate support fasteners in municipal solid waste (MSW) incinerators and biomass-fired boilers where chlorine-bearing combustion gases, high temperatures, and thermal cycling combine to destroy conventional stainless steel bolting within a single operating season.

Inconel 601 Bolts Standards & International Certifications

Inconel 601 Bolts 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 931 DIN 933 ISO 4014 ISO 4017 ASME B18.2.1 IS 1364 IS 1367
Certifications
ISO 9001:2015AMS 5715NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Inconel 601 Bolts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Inconel 601 Bolts — 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 601 Bolts — Frequently Asked Questions

Browse expert answers to common questions about Inconel 601 Bolts 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 601 bolts selection and pricing.
Inconel 601 bolts are machined from hot-finished or cold-drawn bar stock conforming to ASTM B166 (UNS N06601). The equivalent European standard is EN 10095 / DIN 2.4851. Fastener dimensional standards are DIN 931 / DIN 933 / ISO 4014 for metric hex bolts and ASME B18.2.1 for inch hex and heavy hex bolts. Stud bolts for high-temperature flange applications are manufactured per ASME B16.5 with thread form per ASME B1.1 (UNC). AMS 5715 bar is available for aerospace-traceable orders.
Inconel 601 bolts are rated for continuous service up to 1200°C in oxidising atmospheres – the highest oxidation resistance of any commercially available nickel alloy fastener. In cyclic thermal service (furnace charge/discharge cycles), the alumina-rich oxide scale is self-healing and re-forms on each heating cycle. For reducing or carburising atmospheres, the practical limit is approximately 1050°C. Above 1100°C in sustained service, creep relaxation must be accounted for in joint design – consult our engineering team for bolt load retention calculations at elevated temperature.
Yes – Inconel 601 has excellent resistance to carburisation due to its high chromium content (21-25%) forming a protective Cr2O3 barrier that limits carbon ingress into the bolt shank and threads. In endothermic atmosphere furnaces (carbon potential 0.8-1.2%), Inconel 601 bolts significantly outlast 310 stainless steel and Incoloy 800H fasteners. For extremely high carbon-potential atmospheres above 1.5% CP, Inconel 601 is still preferred over stainless but should be inspected at each scheduled maintenance interval for surface carburisation depth.
Use nickel-based anti-seize paste (Molykote P-37, Jet-Lube KOPR-KOTE Pure Nickel, or Bostik Never-Seez Pure Nickel Grade) rated to at least 1200°C. Apply to bolt threads and nut bearing face before assembly. Reduce torque values by approximately 20% compared to dry assembly values. Never use copper-based, zinc-based, or graphite-based anti-seize on Inconel 601 – copper and zinc create galvanic couples that accelerate corrosion at thread roots, and graphite can promote carburisation at elevated temperatures.

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  • Ahmedabad
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  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
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  • Jamnagar
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