Inconel Bolts Manufacturer in India | 600, 601, 625, 718 & X-750 Hex Bolts

Q: Which Inconel grade is best for bolts?

There is no single best grade - it depends on the duty. Inconel 718 is the strongest at 150 ksi minimum yield but limited to about 704 degrees C. Inconel 601 is the most heat-resistant, forming a protective oxide scale to about 1250 degrees C, but yields at only 30 ksi. Inconel 625 is the best all-rounder at 60 ksi yield with excellent seawater and acid resistance. Inconel 600 suits chloride and caustic service to about 1090 degrees C. Work through the three questions in the selection guide above, or send us your conditions.

Q: What is the strongest Inconel bolt?

Inconel 718 in the solution treated and double aged condition: a minimum of 1275 MPa (185 ksi) tensile and 1034 MPa (150 ksi) yield per ASTM B637 and AMS 5663. That is comparable to a quenched-and-tempered alloy steel bolt, but retained at 1200 degrees F and with full ductility down to cryogenic temperatures.

Q: What temperature can Inconel bolts withstand?

It ranges from about 704 degrees C for Inconel 718 and X-750 up to about 1250 degrees C for Inconel 601 in oxidising service. The precipitation-hardened grades are limited because their strengthening precipitate coarsens with heat; the solid-solution grades keep going. This is why Inconel alone is not a temperature specification - always state the grade.

Five Inconel Bolting Grades, and How to Tell Which One Your Joint Needs

Inconel bolts are not one product. It is a family of nickel-based superalloy fasteners whose members differ from one another more than stainless steel differs from carbon steel. An Inconel 718 bolt yields at 150 ksi but should not be trusted much above 704°C. An Inconel 601 bolt yields at 30 ksi yet keeps forming a protective oxide scale at 1250°C. Specifying the wrong one costs you either a failed joint or four times the necessary spend. At Unifit Fastener, we manufacture the full bolting range in all five common grades — 600, 601, 625, 718 and X-750 — as hex bolts, heavy hex bolts, socket head cap screws, stud bolts, anchor bolts and drawing-specific specials, from M3 to M100 and 3/16" to 4", to ASTM B166, B637, B564 and F467/F468. Every lot is PMI-verified and released with an EN 10204 3.1 mill test certificate. Use the comparison matrix below to narrow the grade, then follow the link to that grade's page for full chemistry, dimensions and torque data — or send us the drawing and service conditions and we will confirm the selection before quoting.

What Are Inconel Bolts?

Inconel bolts are threaded fasteners manufactured from nickel-chromium superalloys developed for service conditions that defeat stainless steel: sustained high temperature, thermal cycling, chloride and acid attack, and combinations of all three. The family name is a registered trademark of Special Metals Corporation; the generic designations are Alloy 600 / 601 / 625 / 718 / X-750 and their corresponding UNS numbers.

Two Strengthening Mechanisms, Two Very Different Bolts

Everything about grade selection follows from one metallurgical distinction, and it is worth understanding before reading the matrix.

Mechanism	Grades	What It Means for a Bolt
Solid solution strengthened	Inconel 600, 601, 625	Strength comes from the alloying elements themselves. Moderate strength, but stable indefinitely at temperature — no ageing, no over-tempering, no property loss after long hot holds.
Precipitation hardened (age hardened)	Inconel 718, X-750	Strength comes from a controlled heat treatment that precipitates fine particles through the matrix. Very high strength, but the precipitate coarsens above roughly 700°C and the bolt loses its advantage.

So the rule of thumb is straightforward: if the joint is hot, use a solid-solution grade; if the joint is highly loaded, use a precipitation-hardened grade. Where it is both, the compromise is usually 625 or X-750, and that is a conversation worth having with an engineer rather than a catalogue.

Browse the wider Inconel fasteners range, the parent nickel alloy fasteners catalogue, or our general bolts manufacturer capability.

Inconel Bolt Grade Comparison Matrix

This is the fold the page exists for. Every figure is a specification minimum in the standard supply condition, not a typical mill result — design against these.

Grade	UNS	Standard	Min Tensile	Min Yield	Service Ceiling	Specify It When
Inconel 600	N06600	ASTM B166	550 MPa / 80 ksi	240 MPa / 35 ksi	~1090°C	Furnaces, heat exchangers, chloride and caustic streams
Inconel 601	N06601	ASTM B166	550 MPa / 80 ksi	205 MPa / 30 ksi	~1250°C oxidising	The hottest cycling oxidising zones; carburising atmospheres
Inconel 625	N06625	ASTM B446 / F468	827 MPa / 120 ksi	414 MPa / 60 ksi	~982°C	Seawater, acids, subsea — corrosion-led duty with good strength
Inconel 718	N07718	ASTM B637	1275 MPa / 185 ksi	1034 MPa / 150 ksi	~704°C	Highest strength: turbines, downhole, cryogenic, aerospace
Inconel X-750	N07750	AMS 5698/5699	~1100 MPa / 160 ksi	~690 MPa / 100 ksi	~704°C	Springs, retaining hardware, moderate-strength hot service

Adjacent Grades Worth Considering

Buyers searching "Inconel bolts" often end up specifying an Incoloy grade, because the duty is corrosion rather than heat. These sit in the same family and we manufacture them all.

Grade	UNS	Min Yield	Service Ceiling	Specify It When
Incoloy 800 / 800HT	N08800 / N08811	205 MPa / 30 ksi	~982°C	Cost-balanced high-temperature process hardware
Incoloy 825	N08825	241 MPa / 35 ksi	~540°C	Sulphuric and phosphoric acid, sour service, chlorides
Incoloy 925	N09925	~758 MPa / 110 ksi	~540°C	Sour service where 825 strength is insufficient
ASTM A453 Gr 660 (A286)	S66286	585 MPa / 85 ksi	~650°C	Cost-effective alternative to 718 below 650°C

Grade pages: Inconel 600 · Inconel 601 · Inconel 625 · Inconel 718 · Inconel X-750 · Incoloy 800/800HT · Incoloy 825 · Incoloy 925 · ASTM A453 Gr 660

Send Your Enquiry

Grade Selection Guide: Answer Three Questions

If the matrix has not settled it, work through these in order. The first question that gives a decisive answer is usually the one that governs.

Question 1 — What is the sustained service temperature?

Temperature Band	Grades That Qualify	Notes
Above 1100°C	Inconel 601	The aluminium addition is what keeps the oxide scale adherent through cycling
870 – 1100°C	Inconel 600, 601	Both solid-solution; 601 for cycling, 600 for chemistry
700 – 870°C	Inconel 625, 600, Incoloy 800HT	Precipitation-hardened grades start losing their advantage here
Below 700°C	All five, plus Incoloy 825/925	Strength and corrosion, not temperature, will decide
Cryogenic	Inconel 718, 625, 600	No ductile-to-brittle transition in any of them

Question 2 — What is attacking the bolt?

Environment	Best Grade	Why
Dry oxidising heat, thermal cycling	Inconel 601	Dual alumina + chromia oxide film resists spalling
Chlorides, caustics, reducing media	Inconel 600	72% minimum nickel content
Seawater, pitting and crevice attack	Inconel 625	PREN around 45 — the highest in the Inconel family
Sulphuric and phosphoric acid	Incoloy 825	Copper addition handles reducing acids
Sour gas (H₂S)	Inconel 718 or Incoloy 825/925	Procure to NACE MR0175 / ISO 15156 explicitly
Carburising furnace atmospheres	Inconel 601, Incoloy 800HT	Both resist carbon pickup at temperature

Question 3 — What load must the joint carry?

Up to 35 ksi yield — any grade will do; choose on temperature and chemistry alone.
35 to 60 ksi yield — Inconel 625 is the natural answer, and brings excellent corrosion resistance with it.
60 to 100 ksi yield — Inconel X-750, or ASTM A453 Gr 660 if the budget is tight and the temperature is below 650°C.
Above 100 ksi yield — Inconel 718, solution treated and double aged. Nothing else in the family reaches it.

Preload and Torque Vary Enormously by Grade

This is the point most Inconel bolt pages miss entirely, and it causes real damage on site. A single "nickel alloy torque chart" applied across grades will either badly under-clamp an 718 joint or take a 601 bolt past yield. The correct preload differs by a factor of five across the family.

Worked Comparison at 65% of Minimum Yield

Using T = K × D × F, with K = 0.20 dry and 0.15 lubricated, and target preload at 65% of each grade's specification minimum yield on the tensile stress area.

Grade	Min Yield (ksi)	1/2"–13 Preload (lbf)	1/2"–13 Torque Dry (ft-lb)	3/4"–10 Preload (lbf)	3/4"–10 Torque Dry (ft-lb)
Inconel 601	30	2,767	23	6,513	81
Inconel 600	35	3,228	27	7,599	95
Incoloy 825	35	3,228	27	7,599	95
Inconel 625	60	5,534	46	13,026	163
Inconel X-750	100	9,224	77	21,710	271
Inconel 718	150	13,835	115	32,565	407

For lubricated or PTFE-coated threads, multiply the dry torque by roughly 0.75 (K = 0.15) or 0.55 (K = 0.11) respectively.

Assumptions and limits. Calculated for the standard supply condition of each grade — annealed for 600, 601, 625 and 825; solution treated and double aged for 718; annealed and aged for X-750 — with clean undamaged threads at ambient temperature. Reduce the target preload for service above roughly 60% of the grade's temperature ceiling, for gasketed flanges with a specified seating stress, for reused fasteners, and for any joint governed by a code calculation. Where preload accuracy genuinely matters, use bolt elongation measurement or a tensioner rather than torque. Unifit Fastener will supply a joint-specific calculation on request — send us the drawing.

Inconel Bolt Types We Manufacture

Every profile below is available in all five Inconel grades and the adjacent Incoloy grades. Standards shown are the usual dimensional reference; we also work to customer drawings.

Hex and Structural Bolts

Bolt Type	Standard	Typical Use Case
Hex bolts / hex head bolts	ASME B18.2.1, DIN 931 / 933	General flange and structural bolting — the volume product
Heavy hex bolts	ASME B18.2.1	Pressure-boundary flanged joints and high-preload assemblies
Hex head cap screws	ASME B18.2.1	Machined assemblies requiring a controlled under-head radius
Hex flange bolts	DIN 6921	Vibration-prone joints without a separate washer
12-point flange bolts	OEM drawing	Maximum torque in restricted-access aerospace and turbine work
Square head bolts	ASME B18.2.1	Traditional plant and refractory anchor work
Tap bolts and machine bolts	DIN 933 / custom	Tapped-hole assemblies

Socket and Precision Screws

Type	Standard	Typical Use Case
Socket head cap screws	ASME B18.3, DIN 912	Valve internals, turbine casings, compact assemblies
Countersunk / flat head socket screws	DIN 7991, ISO 10642	Flush-mounted covers, liners and tank internals
Button head socket screws	ISO 7380	Low-profile guards and panels
Torx and security screws	ISO 14579	Tamper-resistant and precision assemblies
Shoulder bolts	ISO 7379	Precision location under load
Set screws and grub screws	DIN 913 – 916	Shaft and collar location at temperature

Studs, Anchors and Formed Bolts

Type	Description
Fully threaded stud bolts	Continuous thread both ends — the standard ASME B16.5 flange stud
Double-ended studs (tap-end / nut-end)	Plain centre body with threaded ends for tapped-hole assemblies
Reduced-shank stud bolts	Waisted body for controlled elongation and improved fatigue life
Threaded rods / all-thread	DIN 976, cut to length or in standard bar lengths
Anchor bolts, sleeve and wedge anchors	Equipment and foundation anchoring in hot or corrosive plant
U bolts, J bolts, hook bolts	Pipe support, tube clamping and restraint hardware
Eye bolts and lifting hardware	DIN 580 — lifting points in corrosive or hot environments
Foundation and elevator bolts	Structural and conveyor hardware
Carriage bolts	DIN 603 — through-bolted plate, lining and cladding work

For the full studs range see Inconel stud bolts and the general stud bolts page. Matching hardware: Inconel washers and nickel alloys nuts.

Size Range, Threads and Finishes

Parameter	Specification
Bolt diameter range	M3 – M100 \| 3/16" to 4" \| larger to drawing
Length range	3 mm to 200 mm as standard; longer studs and threaded rod to order
Thread types	UNC, UNF, UN, 8UN, BSW, BSF, metric coarse, metric fine, left or right hand
Thread tolerance classes	ASME B1.1 2A/3A inch unified; ASME B1.13M 6g metric
Thread production	Rolled wherever section permits (superior fatigue life); cut or ground for large or precision sections
Head styles	Hex, heavy hex, square, round, flange, countersunk, socket, button, T-head, triangular
Point / end styles	Chamfered, cone, cup, flat, dog point, rolled end
Surface finish	Bright / self-colour, pickled and passivated, black oxide, phosphate
Anti-galling coatings	Xylan, PTFE / Teflon, electroless nickel, zinc-nickel, silver plating
Tolerance	OEM / ODM to drawing; ±0.03 mm achievable on machined features
Marking	Heat number, grade and manufacturer identification stamped as standard

Coating pages: Xylan coated fasteners and PTFE / Teflon coated fasteners. Background reading on fastener coatings, types and standards.

Galling: The Problem Every Inconel Bolt User Meets

If you have used nickel alloy bolting before, you have probably seized a joint. It is worth understanding why, because the fix is cheap and the failure is expensive.

Nickel alloys are highly ductile and carry a tenacious, self-repairing oxide film. Under the contact pressure of a tightening thread, that film is scraped through, exposing clean metal to clean metal — which cold-welds instantly. The weld then tears, roughening both surfaces, and the process accelerates until the nut seizes solid on the stud. It is not a manufacturing defect and it is not specific to any one grade; it is inherent to the material class, and the risk rises with preload, so 718 joints gall more readily than 601 joints.

What Actually Prevents It

Use a nickel-based anti-seize compound on the threads and under the nut face. This is the single most effective measure and the cheapest.
Slow the assembly speed. Galling is a frictional heating phenomenon; impact wrenches on nickel alloy threads are a reliable way to seize a joint.
Specify an anti-galling coating — Xylan or PTFE. These also give a far more predictable and repeatable torque-to-preload relationship, which matters as much as the galling protection itself.
Avoid mixing hardnesses. A nut significantly harder or softer than the bolt raises the risk. Matched sets from one heat are the safest route.
Do not reuse a galled fastener. Once the thread flanks are torn, the damage is permanent regardless of how it cleans up visually.

Standards by Grade

One reason Inconel bolt certificates get queried at inspection is that the governing standard differs by grade and by product form. This table resolves it.

Standard	Applies To	Scope
ASTM B166 / ASME SB166	Alloy 600, 601	Nickel-chromium-iron alloy rod, bar and wire — the base stock standard
ASTM B446 / ASME SB446	Alloy 625	Nickel-chromium-molybdenum-columbium alloy rod and bar
ASTM B637 / ASME SB637	Alloy 718, X-750	Precipitation-hardening nickel alloy bars and forgings for high-temperature service
ASTM B425 / ASME SB425	Incoloy 825	Nickel-iron-chromium-molybdenum-copper alloy rod and bar
ASTM B408 / ASME SB408	Incoloy 800 / 800HT	Nickel-iron-chromium alloy rod and bar
ASTM B564 / ASME SB564	All grades	Nickel alloy forgings — heavy hex heads, anchors and forged specials
ASTM F467 / F468	All grades	Nonferrous nuts, bolts, hex cap screws and studs for general use
ASTM F2281	All grades	Nickel alloy fasteners for high-temperature service
AMS 5662 / 5663 / 5664	Alloy 718	Aerospace heat treatment conditions — solution treated, double aged
AMS 5698 / 5699	Alloy X-750	Aerospace conditions for spring and hot hardware
NACE MR0175 / ISO 15156	718, 825, 925	Sour service qualification — must be specified explicitly at enquiry
ASME B18.2.1 / B18.2.2 / B18.3	All grades	Dimensional standards for inch bolts, nuts and socket screws
DIN 931 / 933 / 912 / 976	All grades	Metric bolt, screw and threaded rod dimensions
EN 10204 3.1	All grades	Mill test certificate from the manufacturer's independent inspection function

More context in our fasteners standards reference and the guide to ISO fastener standards.

Applications & Industries Served

Industry	Typical Bolting Duty	Usual Grade
Heat treatment & furnaces	Muffle and retort hardware, basket assemblies, door fixings	Inconel 601, 600
Petrochemical & refining	Reformer bolting, cracking furnace hardware, hot flanged joints	Inconel 600, 601, Incoloy 800HT
Aerospace & gas turbine	Engine casings, exhaust hardware, airframe fittings	Inconel 718, X-750
Oil & gas — downhole and sour	Wellhead bolting, packers, tool joints	Inconel 718, Incoloy 925
Subsea & offshore	Connector bolting, riser hardware, splash-zone fixings	Inconel 625, 718
Power generation	Boiler and turbine bolting, superheater supports, ducting	Inconel 600, 601, 718
Nuclear engineering	Reactor internals, steam generator hardware, fuel handling	Inconel 600, 718
Chemical & acid plants	Reactor, evaporator and pipe support bolting	Incoloy 825, Inconel 625
Marine & desalination	Seawater heat exchangers, condenser and pump hardware	Inconel 625, 600
Cryogenic & LNG	Transfer line clamps, vacuum jacket hardware	Inconel 718, 625, 600
Pollution control & FGD	Absorber internals, ducting and damper hardware	Incoloy 825, Inconel 625

Further reading: applications and uses of Inconel fasteners, advantages of nickel alloy fasteners and why Inconel 718 bolts are preferred for high-temperature environments.

Inconel Bolts vs Other High-Performance Fastener Materials

Material	Min Yield	Temperature Ceiling	Corrosion Profile	Relative Cost
Inconel (600 – 718 range)	30 – 150 ksi	704 – 1250°C	Excellent across chlorides, caustics, oxidising heat	High
Stainless steel 316L	30 ksi	~870°C (scaling)	General service; poor chloride SCC resistance	Low
Duplex / super duplex	65 – 80 ksi	~300°C	Excellent chloride pitting resistance; limited temperature	Medium
Monel 400	25 ksi	~540°C	Outstanding in seawater and hydrofluoric acid	High
Hastelloy C-276	41 ksi	Moderate	The most aggressive wet corrosion, including hot HCl	Very high
Titanium Gr 5	120 ksi	~400°C	Excellent seawater performance at low weight	High
Alloy steel B7 / B16	105 / 95 ksi	~450 / 540°C	Requires coating; no inherent corrosion resistance	Low

Compare with stainless steel fasteners, duplex steel fasteners, super duplex fasteners, Monel 400 fasteners, Hastelloy fasteners, titanium fasteners and high tensile fasteners.

Our Manufacturing & Quality Process

The route differs between solid-solution and precipitation-hardened grades, and that difference is where most quality problems originate.

Stage	Solid Solution Grades (600, 601, 625)	Precipitation Hardened Grades (718, X-750)
Material verification	PMI and spectro analysis on every incoming lot	Same, with particular attention to niobium and titanium
Forming	Cold heading for volume sizes; hot forging for heavy heads	Hot forging within a tighter temperature window
Heat treatment	Solution annealing to dissolve carbides and relieve stress	Solution treatment plus a full two-stage ageing cycle, chart-documented
Thread production	Rolled after annealing wherever section permits	Rolled after ageing wherever section permits — sequence is critical
Critical acceptance check	Hardness and dimensional	Hardness on the finished part — the only reliable proof of complete ageing

Testing We Perform

Test	Purpose	Availability
Positive Material Identification (PMI)	Confirms alloy grade before dispatch	100% of lots
Chemical analysis (spectro)	Verifies composition against the grade standard	Per heat
Tensile, yield, elongation and RA	Confirms mechanical class	Per lot / per heat
Hardness survey	Confirms condition — critical for aged 718 and X-750	Per lot, on finished parts
Ultrasonic testing (UT)	Internal flaw detection in billets and large studs	On request / per spec
Dye penetrant (DP) testing	Surface crack detection	On request
Intergranular corrosion test	Confirms freedom from sensitisation	On request
Stress rupture testing	Validates creep performance for AMS-route material	On request
Dimensional and thread gauging	Go/no-go and profile verification	100% sampling plan
Third-party inspection	TÜV, BV, SGS, Lloyd's witness inspection	On request

Why Buy Inconel Bolts From Unifit Fastener

Across five grades, the value a supplier adds is not stock availability — it is telling you which grade you actually need, including when that answer costs us margin.

EEAT Pillar	What Unifit Fastener Delivers
Experience	Production and export experience across furnace, refinery, turbine, subsea, nuclear and acid plant bolting — including shutdown supply where the outage date, not the price, is the constraint.
Expertise	In-house metallurgists who will review your service conditions and confirm the grade, condition, thread class, preload method and anti-galling strategy before quoting.
Authoritativeness	Manufacturing to ASTM, ASME, AMS, DIN, ISO, JIS, BS and IS across all five Inconel grades; dual certification; acceptance by third-party inspection agencies and EPC approvals.
Trustworthiness	Heat-number traceability, EN 10204 3.1 certification as standard, the correct standard cited by grade and product form, and published technical data that matches what we ship.

Global Supply Footprint

We supply Inconel bolts across India — Mumbai, Pune, Ahmedabad, Chennai, Hyderabad, Bangalore, Coimbatore, Jamnagar, Vadodara, Kolkata, Vizag and Pimpri-Chinchwad — and export to the UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Singapore, Malaysia, Thailand, Indonesia, Vietnam, South Korea, Japan, Australia, the United States, Canada, Mexico, Brazil, the United Kingdom, Germany, Netherlands, Italy, Turkey, Egypt, Nigeria and South Africa.

Packing & Dispatch

Bulk items in cartons on palletised loads; precision and aerospace items individually separated
VCI paper and moisture-barrier wrapping for sea freight
Fumigated wooden crates conforming to ISPM-15 for export
Heat number, grade and size marked on every package
Air, sea and courier dispatch with export documentation handled end-to-end

Inconel Bolt Price

Price varies more across the Inconel family than most buyers expect, and grade choice is usually the largest single lever available to you.

Cost Driver	Effect on Price
Grade selection	The dominant variable. An 718 bolt typically costs several times a 600 bolt of the same size, driven by niobium content and the 18-hour heat treatment
LME nickel, chromium, molybdenum and niobium	Raw material is typically 60–70% of finished cost and moves with the metals market
Heat treatment route	Solution annealing is a short cycle; the 718 and X-750 solution-plus-double-age cycle is an unavoidable line item
Machining difficulty	Aged 718 is hard on tooling; finishing operations after ageing cost significantly more than on annealed grades
Size and section	Large-diameter studs consume disproportionately more bar stock and furnace capacity
Standard vs custom geometry	Catalogue DIN/ASME items cost far less than drawing-specific specials requiring new tooling
Specification route	AMS, API 6A718 or NACE-qualified material carries additional testing and documentation cost
Coating and testing	Xylan, PTFE, UT, DP or witnessed inspection add cost and lead time
Order quantity and urgency	Volume runs are materially cheaper per piece; expedited shutdown supply carries a premium

Before you accept a quotation on a premium grade, it is worth asking whether the duty genuinely requires it. We will run that check for you at no cost — send the drawing and the service conditions.

Frequently Asked Questions

Which Inconel grade is best for bolts?

There is no single best grade — it depends on the duty. Inconel 718 is the strongest at 150 ksi minimum yield but limited to about 704°C. Inconel 601 is the most heat-resistant, forming a protective oxide scale to about 1250°C, but yields at only 30 ksi. Inconel 625 is the best all-rounder at 60 ksi yield with excellent seawater and acid resistance. Inconel 600 suits chloride and caustic service to about 1090°C. Work through the three questions in the selection guide above, or send us your conditions.

What is the strongest Inconel bolt?

Inconel 718 in the solution treated and double aged condition: a minimum of 1275 MPa (185 ksi) tensile and 1034 MPa (150 ksi) yield per ASTM B637 and AMS 5663. That is comparable to a quenched-and-tempered alloy steel bolt, but retained at 1200°F and with full ductility down to cryogenic temperatures.

What temperature can Inconel bolts withstand?

It ranges from about 704°C for Inconel 718 and X-750 up to about 1250°C for Inconel 601 in oxidising service. The precipitation-hardened grades are limited because their strengthening precipitate coarsens with heat; the solid-solution grades keep going. This is why "Inconel" alone is not a temperature specification — always state the grade.

What is the difference between Inconel 625 and 718 bolts?

625 is solid-solution strengthened; 718 is precipitation hardened. That gives 718 roughly double the yield strength (150 ksi versus 60 ksi) but a lower temperature ceiling (704°C versus 982°C). 625 also offers superior pitting and crevice resistance, with a PREN around 45. Choose 718 for load, 625 for corrosion and heat.

Are Inconel bolts stronger than stainless steel bolts?

At room temperature, only some of them are — an annealed Inconel 600 bolt at 35 ksi yield is comparable to 316L stainless. The real difference is what happens at temperature and in corrosive media: stainless scales, relaxes and cracks under chloride attack where Inconel holds its properties. Inconel 718 is stronger than any austenitic stainless bolt by a wide margin.

Tell Us the Duty. We Will Tell You the Grade.

Send us the service temperature, the media, the load and the drawing — our engineering team will confirm the right Inconel grade, condition and thread class before quoting. If a cheaper grade will do the job, we will say so. That conversation takes ten minutes and regularly saves multiples of the order value.

Get a Grade Recommendation + Quote →

Inconel Bolts Manufacturer & Supplier in India — Hex, Heavy Hex, Socket and Stud Bolts in Alloy 600, 601, 625, 718 and X-750