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Inconel X-750 Studs Manufacturer & Exporter in India

Explore Inconel X-750 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 X-750 Studs?

Inconel X-750 studs are precipitation-hardened nickel-chromium alloy fasteners machined from UNS N07750 bar stock conforming to ASTM B637. The alloy achieves its exceptional strength through gamma-prime precipitation hardening via aluminium (0.4-1.0%) and titanium (2.25-2.75%), delivering a minimum tensile strength of 1100 MPa in the age-hardened condition – significantly higher than solid-solution nickel alloys.

Inconel X-750 studs are specified for applications demanding high strength at elevated temperatures up to 700°C combined with resistance to relaxation and creep. They are widely used in gas turbine casing assemblies, nuclear reactor internals, and high-pressure steam flanges where conventional stainless steel or Inconel 625 fasteners cannot maintain adequate clamping load over extended service cycles.

Quick Specifications

MaterialInconel X-750
UNS NumberN07750
DIN Number2.4669
Material StandardASTM B637
Stud Standard (Metric)DIN 938 / DIN 939 / ISO 4032
Stud Standard (Inch)ASME B18.31.2 / ASME B16.5
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength1100 MPa (160 ksi) min
Yield Strength793 MPa (115 ksi) min
HardnessMax 35 HRC / 331 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Inconel X-750 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Inconel X-750 fastener range from certified nickel-chromium superalloy bar stock, including Inconel X-750 Bolts, Inconel X-750 Nuts, Inconel X-750 Screws, Inconel X-750 Washers, and Inconel X-750 Threaded Rods. All Inconel X-750 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Inconel X-750 Bolts
Inconel X-750 Nuts
Inconel X-750 Screws
Inconel X-750 Washers
Inconel X-750 Threaded Rods

Technical Data

Inconel X-750 Studs Dimensions, Sizes & Thread Standards

Inconel X-750 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 938 (metal-end stud) / DIN 939 (stud bolt) / ASME B18.31.2. Custom lengths in 5mm increments. Inch dimensions available per ASME B16.5 and MSS SP-75. All Inconel X-750 studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Bolt Dimensions - Metric (DIN 939 / ISO)

Size (M)Pitch (mm)Shank Dia (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.06.01220150
M81.258.01625200
M101.510.02030250
M121.7512.02435300
M162.016.03245400
M202.520.04055500
M243.024.04865600
M303.530.06080800
M364.036.0721001000
M424.542.0841201000
M485.048.0961401200
M565.556.01121601500
M646.064.01281802000
M726.072.01442002000
M806.080.01602202500
M1006.0100.02002603000

Dimensional & Material Standards

StandardCoversThread
DIN 938Studs, metal-end engagementMetric
DIN 939Studs, 1.25d engagementMetric
ISO 4032Hex nuts for studsMetric
ASME B18.31.2Continuous thread studsUNC/UNF
ASME B16.5Stud bolts for flangesUNC
MSS SP-75High-pressure stud boltsUNC
AMS 5542Aerospace stud specificationUNC/UNF
Material StandardRequirement
ASTM B637Bar/rod - UNS N07750
AMS 5667Bar, age-hardened condition
ASTM F467Fastener mechanical properties
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Inconel X-750 Chemical Composition

Inconel X-750 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 B637

ElementComposition (%)
Nickel (Ni)70.0% min
Chromium (Cr)14.0-17.0%
Iron (Fe)5.0-9.0%
Titanium (Ti)2.25-2.75%
Aluminium (Al)0.40-1.00%
Niobium (Nb)0.70-1.20%
Manganese (Mn)1.00% max
Silicon (Si)0.50% max
Carbon (C)0.08% max
Copper (Cu)0.50% max
Cobalt (Co)1.00% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Inconel X-750 Alloy Composition Matters for Studs

Ti + Al — Gamma-Prime Precipitation Hardening
Titanium and aluminium combine with nickel to form the Ni3(Al,Ti) gamma-prime phase during age hardening. This coherent precipitate is the primary strengthening mechanism, enabling Inconel X-750 studs to sustain clamping loads at temperatures where solid-solution alloys relax significantly.
Cr (14–17%) — High-Temperature Oxidation Resistance
Chromium forms a stable Cr2O3 oxide scale that protects stud threads and bearing surfaces from oxidation up to 980°C. This is critical in gas turbine casing and exhaust manifold applications where studs cycle through wide temperature ranges during start-stop operation.
Nb (0.70–1.20%) — Grain Boundary Stabilisation
Niobium precipitates as NbC carbides at grain boundaries, suppressing grain growth during solution annealing and improving creep rupture life. For studs in nuclear reactor internals and steam turbine casings, this translates directly to extended service intervals without retorquing.

Fastener Performance

Inconel X-750 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Inconel X-750 Studs per ASTM. Inconel X-750 studs achieve 760 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Stud Torque Reference - Age-Hardened Condition

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M121159242
M16275220100
M20545436160
M24945756231
M3018901512368
M3632902632534
M4252504200735
M4877906232966
?? 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 X-750 Studs Applications — Industries & End Uses

Inconel X-750 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 X-750 studs are the standard fastener for gas turbine casing split-line joints, compressor casing flanges, and combustor liner retention. The alloy’s gamma-prime strengthening maintains bolt load at metal temperatures up to 700°C, preventing joint relaxation during thermal cycling. Specified under AMS 5542 and AMS 5667 for aerospace engine applications.
Inconel X-750 studs are used extensively in pressurised water reactor (PWR) and boiling water reactor (BWR) internals, including core barrel hold-down bolts, baffle former bolts, and control rod drive mechanism studs. The alloy’s resistance to stress corrosion cracking in high-temperature water and its low neutron absorption cross-section make it the preferred fastener material per ASME Section III nuclear code.
High-pressure steam turbine casing stud bolt sets in Class 900 to Class 2500 service rely on Inconel X-750 for its superior creep rupture strength at 500-650°C compared to alloy steel B7 or stainless steel B8 class fasteners. Studs maintain gasket seating stress over extended outage intervals, reducing maintenance frequency in base-load power stations.
Inconel X-750 studs are specified for aircraft exhaust nozzle attachment, afterburner casing joints, and nacelle firewall fastening where simultaneous high temperature, vibration fatigue, and oxidising atmosphere rule out titanium or stainless steel alternatives. Fully compliant with AMS 5542 and traceable to AS9100 Rev D quality systems.

Inconel X-750 Studs Standards & International Certifications

Inconel X-750 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 9001:2015AS9100 Rev DNABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Inconel X-750 Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Inconel X-750 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 X-750 Studs — Frequently Asked Questions

Browse expert answers to common questions about Inconel X-750 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 X-750 studs selection and pricing.
Both are precipitation-hardened nickel alloys, but they serve different temperature ranges. Inconel X-750 (UNS N07750) offers superior oxidation resistance and retains adequate strength up to 700°C, making it preferred for gas turbine casings and nuclear internals. Inconel 718 (UNS N07718) delivers higher room-temperature tensile strength (1240 MPa vs 1100 MPa) and better fatigue resistance, making it the choice for aerospace structural fasteners below 650°C. For nuclear reactor internals, X-750 is specifically qualified under ASME Section III due to its established irradiation performance data.
Inconel X-750 studs are supplied in the age-hardened condition per ASTM B637 and AMS 5667. The standard treatment is solution anneal at 1093°C followed by precipitation hardening at 843°C for 24 hours, air cool. This produces the minimum 1100 MPa tensile and 793 MPa yield strength required for high-temperature fastener service. Studs must not be re-welded or re-heat-treated after machining without full re-qualification, as this alters the gamma-prime precipitate distribution and mechanical properties.
Yes – Inconel X-750 has a long qualification history in both PWR and BWR reactor internals. It is listed in ASME Section III for nuclear pressure boundary fasteners and has been used in core barrel, baffle former, and hold-down bolt applications since the 1960s. Key advantages include resistance to stress corrosion cracking in high-temperature pressurised water, low cobalt content variants available to minimise activation, and well-documented irradiation embrittlement data. Material certification to EN 10204 3.2 with TPI witness is standard for nuclear supply.
We supply Inconel X-750 stud bolt sets for ASME B16.5 Class 150 through Class 2500 flanges in pipe sizes ½” to 24″. Each set includes fully threaded stud bolts plus two heavy hex nuts per stud, supplied as a matched heat with a single EN 10204 3.1 MTC covering both components. For Class 900 and above in high-temperature service, hardness surveys and individual piece marking are included as standard. Custom stud lengths for non-standard raised face, ring type joint, or tongue-and-groove flanges are available with 10 working day lead time.

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