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Inconel 601 Screws Manufacturer & Exporter in India

Explore Inconel 601 Screws 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 Screws?

Inconel 601 screws are nickel-chromium-aluminium alloy fasteners manufactured from UNS N06601 bar stock conforming to ASTM B166. The alloy’s exceptional oxidation resistance is derived from its aluminium content (1.0-1.7%), which forms a tightly adherent, self-healing aluminium oxide scale that protects the base metal at temperatures up to 1230°C.

With a nickel content of 58-63% and chromium at 21-25%, Inconel 601 screws deliver outstanding resistance to high-temperature oxidation, carburisation, and nitriding atmospheres. These fasteners are widely specified for industrial furnace components, thermal processing equipment, and high-temperature structural assemblies where standard stainless steel screws fail within weeks of service.

Quick Specifications

MaterialInconel 601
UNS NumberN06601
DIN Number2.4851
Material StandardASTM B166
Screw Standard (Metric)DIN 933 / DIN 912 / ISO 4017
Screw Standard (Inch)ASME B18.6.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM4-M64 / #10-2½"
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 Bolts, Inconel 601 Nuts, 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 Bolts
Inconel 601 Nuts
Inconel 601 Washers
Inconel 601 Studs
Inconel 601 Threaded Rods

Technical Data

Inconel 601 Screws Dimensions, Sizes & Thread Standards

Inconel 601 Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 933 (hex full thread) / DIN 912 (socket head cap) / ISO 4017. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.6.3. All Inconel 601 screws dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Hex Screw Dimensions - Metric (DIN 933 / ISO 4017)

Size (M)Pitch (mm)A/F (mm)Head Ht (mm)Min L (mm)Max L (mm)
M40.772.8680
M50.883.58100
M61.0104.010150
M81.25135.312200
M101.5176.416250
M121.75197.520300
M162.02410.025400
M202.53012.530500
M243.03615.040600
M303.54618.750800
M364.05522.5601000
M424.56526.0801000
M485.07530.01001200
M565.58535.01201500
M646.09540.01402000

Dimensional & Material Standards

StandardCoversThread
DIN 933Hex screws, full threadMetric
DIN 912Socket head cap screwsMetric
DIN 963Slotted countersunk screwsMetric
ISO 4017Hex head screws, full threadMetric
ISO 4762Socket head cap screwsMetric
ASME B18.6.3Machine screws, inchUNC/UNF
ASME B18.3Socket head cap screws, inchUNC
Material StandardRequirement
ASTM B166Bar/rod - UNS N06601
ASTM B168Plate/sheet - UNS N06601
ASTM F467Fastener mechanical properties
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Inconel 601 Chemical Composition

Inconel 601 Screws 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)Balance (approx. 14%)
Aluminium (Al)1.0-1.7%
Carbon (C)0.10% max
Manganese (Mn)1.0% max
Silicon (Si)0.50% max
Copper (Cu)1.0% max
Sulphur (S)0.015% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Inconel 601 Alloy Composition Matters for Screws

Al (1.0–1.7%) — Oxidation Scale Formation
Aluminium is the defining element in Inconel 601. It forms a dense, adherent Al2O3 oxide layer at elevated temperatures that resists spalling during thermal cycling — critical for screws used in furnace door hinges, retort closures, and heat treatment fixtures that cycle repeatedly between ambient and service temperature.
Cr (21–25%) — Carburisation & Sulphidation Resistance
The high chromium content provides a secondary Cr2O3 barrier that resists carburisation in hydrocarbon atmospheres and sulphidation in combustion gas environments. Inconel 601 screws maintain structural integrity in atmospheres where carbon activity is high enough to destroy lower-chromium alloys.
Fe Balance — Cost-Effective High-Temperature Performance
The iron balance (approximately 14%) reduces raw material cost compared to fully nickel-based alloys while preserving the high-temperature mechanical properties needed for fastener applications above 900°C. This makes Inconel 601 screws the preferred choice where Inconel 625 or 718 would be over-specified.

Fastener Performance

Inconel 601 Screws Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Inconel 601 Screws per ASTM. Inconel 601 screws 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 Screws

Screw SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M6865
M8191510
M10383019
M12655228
M1616012862
M2031525298
M24545436142
M301090872226
?? 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 alloys - galvanic corrosion risk at elevated temperatures.

Industry Applications

Inconel 601 Screws Applications — Industries & End Uses

Inconel 601 Screws 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 screws are the standard fastener for industrial furnace construction – including roller hearth, pusher, and box furnaces. Used to secure refractory anchors, radiant tube supports, muffle retort closures, and furnace door hardware operating continuously above 900°C in oxidising and cycling thermal atmospheres.
Socket head cap screws and hex screws in Inconel 601 are specified for atmosphere retort closures, carburising basket assemblies, and nitriding fixture hardware. The alloy’s resistance to carburisation and nitriding atmospheres prevents embrittlement and thread seizure that destroys stainless steel fasteners within a single campaign.
Inconel 601 screws are used in fired heater tube support hangers, radiant section refractory anchors, and convection section casing connections where flue gas temperatures exceed 1000°C and sulphur-bearing combustion products are present. Outperforms 310 stainless steel in cyclic oxidation resistance.
Flange screws and structural fasteners for waste-to-energy boiler refractory linings, incinerator grate assemblies, and ash handling equipment where chlorine-bearing combustion gases and temperatures above 850°C combine to rapidly corrode lower-alloy fasteners. Inconel 601 provides reliable service life in these aggressive environments.

Inconel 601 Screws Standards & International Certifications

Inconel 601 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 9001:2015NABL LabPED 2014/68/EUAMS 5715MTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified Inconel 601 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

Inconel 601 Screws — Frequently Asked Questions

Browse expert answers to common questions about Inconel 601 Screws 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 screws selection and pricing.
Inconel 601 screws are manufactured to DIN 933 (hex full thread), DIN 912 (socket head cap screws), ISO 4017 (hex head screws), ISO 4762 (socket head cap screws), and ASME B18.6.3 (inch machine screws). Special drive types including Torx, Phillips, and slotted heads are available on request. Custom thread forms including BSW and UNF are produced with a 15 working day lead time.
Inconel 601 screws are rated for continuous service up to 1230°C in oxidising atmospheres – the highest oxidation resistance of any commercially available nickel alloy fastener. In cyclic thermal service (repeated heating and cooling), the aluminium oxide scale remains adherent and self-healing, preventing the scale spalling that causes rapid metal loss in 310 stainless steel and other high-temperature alloys.
Inconel 601 significantly outperforms 310 stainless steel above 900°C. The aluminium addition in alloy 601 creates a more protective oxide scale than the chromium-only scale in 310 SS, particularly under cyclic thermal conditions. In carburising atmospheres, 601 resists carbon ingress that embrittles 310 SS within a single heat treatment campaign. For furnace applications above 950°C, Inconel 601 screws typically deliver 3-5 times the service life of 310 SS fasteners.
Inconel 601 performs well in oxidising and mildly reducing atmospheres but is not recommended for strongly reducing, sulphidising environments at high temperature. In mixed atmospheres – such as those found in industrial furnaces with controlled nitrogen-hydrogen atmospheres – alloy 601 performs reliably. For strongly sulphidising reducing conditions, Inconel 625 or alloy 825 should be considered. Contact our engineering team for atmosphere-specific guidance.

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