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Inconel X-750 Screws Manufacturer & Exporter in India

Explore Inconel X-750 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 X-750 Screws?

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

Inconel X-750 screws maintain mechanical integrity from cryogenic temperatures up to 700°C continuous service, making them the preferred fastener choice for gas turbine casings, nuclear reactor internals, and high-temperature pressure vessel closures. The alloy complies with AMS 5667, AMS 5668, and AMS 5671 specifications and is widely referenced in aerospace and power generation procurement standards worldwide.

Quick Specifications

MaterialInconel X-750
UNS NumberN07750
DIN Number2.4669
Material StandardASTM B637
Screw Standard (Metric)DIN 912 / DIN 933 / ISO 4762
Screw Standard (Inch)ASME B18.3 / ASME B18.2.1
Thread FormISO Metric / UNC / UNF
Diameter RangeM4-M64 / #10-2½"
Tensile Strength1100 MPa (160 ksi) min (aged)
Yield Strength758 MPa (110 ksi) min (aged)
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 Washers, Inconel X-750 Studs, 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 Washers
Inconel X-750 Studs
Inconel X-750 Threaded Rods

Technical Data

Inconel X-750 Screws Dimensions, Sizes & Thread Standards

Inconel X-750 Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 912 (socket head cap screws) / DIN 933 (hex full thread) / ISO 4762. Custom lengths in 5 mm increments. Inch dimensions available per ASME B18.3 and ASME B18.2.1.

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

Size (M)Pitch (mm)Head Dia (mm)Head Ht (mm)Socket (mm)Min L (mm)Max L (mm)
M40.77.04.03650
M50.88.55.04880
M61.010.06.0510100
M81.2513.08.0612150
M101.516.010.0816200
M121.7518.012.01020250
M162.024.016.01425300
M202.530.020.01730400
M243.036.024.01940500
M303.545.030.02250600
M364.054.036.02760800
M424.563.042.032801000
M485.072.048.0361001200
M565.584.056.0411201500
M646.096.064.0461402000

Dimensional & Material Standards

StandardCoversThread
DIN 912Socket head cap screwsMetric
DIN 933Hex screws, full threadMetric
ISO 4762Socket head cap screwsMetric
ISO 4017Hex head screws, full threadMetric
ASME B18.3Socket head cap screwsUNC/UNF
ASME B18.2.1Hex head screwsUNC/UNF
DIN 7984Low head socket cap screwsMetric
Material StandardRequirement
ASTM B637Bar/rod - UNS N07750
AMS 5667Bar, annealed condition
AMS 5668Bar, age-hardened condition
AMS 5671Bar, solution + precipitation treated
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Inconel X-750 Chemical Composition

Inconel X-750 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 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 + Ta (Nb+Ta)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 Screws

Ti + Al — Gamma-Prime Precipitation Hardening
Titanium (2.25–2.75%) and aluminium (0.40–1.00%) combine to form the Ni3(Al,Ti) gamma-prime phase during age hardening. This precipitation mechanism elevates tensile strength beyond 1100 MPa without relying on cold work, ensuring uniform mechanical properties throughout the screw cross-section.
Cr (14–17%) — Oxidation and Corrosion Resistance
Chromium content forms a stable, self-repairing oxide layer that protects Inconel X-750 screws against oxidation up to 700°C continuous service and 870°C intermittent exposure. This makes the alloy suitable for gas turbine casing fasteners and furnace hardware where stainless steel screws fail prematurely.
Nb + Ta (0.70–1.20%) — Grain Boundary Stability
Niobium and tantalum additions stabilise grain boundaries and suppress carbide precipitation during thermal cycling. Inconel X-750 screws retain their mechanical properties after repeated heat-up and cool-down cycles — a critical requirement for nuclear reactor spring applications and jet engine hardware.

Fastener Performance

Inconel X-750 Screws Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Inconel X-750 Screws per ASTM. Inconel X-750 screws 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 X-750 Screws (Age-Hardened)

Screw SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M614118
M8342716
M10675426
M121169340
M1628522896
M20560448152
M24970776220
M3019401552350
M3633802704510
M4254004320700
?? 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 corrosion risk.

Industry Applications

Inconel X-750 Screws Applications — Industries & End Uses

Inconel X-750 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 X-750 socket head cap screws and hex screws are the standard fastener for gas turbine compressor casing joints, combustion liner retention, and turbine blade retaining rings. The alloy’s gamma-prime strengthening maintains clamping force at temperatures where austenitic stainless steel screws relax and lose preload. Specified under AMS 5667/5668 by major OEMs including GE Aviation, Rolls-Royce, and Pratt & Whitney.
Inconel X-750 screws are extensively used in pressurised water reactor (PWR) and boiling water reactor (BWR) internal assemblies, including fuel assembly hold-down springs, control rod guide tube fasteners, and core barrel connections. The alloy’s resistance to stress corrosion cracking in high-temperature, high-purity water at 300-340°C is unmatched among precipitation-hardened nickel alloys. Compliant with ASME Section III nuclear code requirements.
Hex screws and socket cap screws in Inconel X-750 are specified for closure bolting on high-pressure autoclaves, heat treatment furnace doors, and chemical reactor heads operating above 500°C where standard alloy steel fasteners creep and lose clamping load. The alloy retains over 70% of its room-temperature yield strength at 650°C.
Inconel X-750 machine screws and pan head screws are used in aircraft exhaust nozzle assemblies, afterburner hardware, and thrust reverser structural connections. The combination of high fatigue strength, oxidation resistance to 870°C, and low thermal expansion coefficient makes X-750 screws the preferred choice over titanium fasteners in high-heat-flux zones.

Inconel X-750 Screws Standards & International Certifications

Inconel X-750 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 9001:2015NACE MR0175NABL LabAS9100DMTC 3.1 / 3.2

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

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

Browse expert answers to common questions about Inconel X-750 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 X-750 screws selection and pricing.
Inconel X-750 screws are manufactured to DIN 912 (socket head cap screws, metric), ISO 4762 (socket head cap screws), DIN 933 (hex screws, full thread), ISO 4017 (hex head screws), and ASME B18.3 (socket head cap screws, inch). Machine screws are available per ASME B18.6.3. Custom drive types including Torx, Phillips, and slotted heads are available on request. All screws are supplied in the age-hardened condition per AMS 5668 unless otherwise specified.
Inconel X-750 screws are available in three heat treatment conditions. Annealed only (AMS 5667) provides moderate strength suitable for forming operations. Solution treated and aged (AMS 5668) delivers the standard fastener condition with tensile strength exceeding 1100 MPa – the most commonly specified condition for gas turbine and nuclear applications. Equalized and over-aged (AMS 5671) provides improved stress corrosion cracking resistance for nuclear reactor internals at the cost of slightly reduced tensile strength. Specify your operating temperature and environment when ordering so our engineers can confirm the correct condition.
Yes – Inconel X-750 is one of the primary fastener alloys for PWR and BWR reactor internals. The alloy demonstrates excellent resistance to stress corrosion cracking in high-purity water at 300-340°C and maintains mechanical properties under neutron irradiation. Screws for nuclear service are supplied in the equalized and over-aged condition (AMS 5671) with full ASME Section III material certification, NDE documentation, and hardness survey. Contact our engineering team for nuclear-grade documentation packages.
Yes – Inconel X-750 screws are acceptable under NACE MR0175/ISO 15156 for sour service applications provided hardness does not exceed 35 HRC (331 HB). All screws supplied for sour service applications include a full hardness survey report with a minimum of three readings per piece. The age-hardened condition per AMS 5668 typically achieves 28-33 HRC, comfortably within the NACE limit while retaining high tensile strength for downhole tool and wellhead applications above 150°C.

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  • Ahmedabad
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