Inconel 600 FastenersUNS N06600 · Manufacturer, trader & exporter, India
Also sold as Alloy 600 · UNS N06600 · W.Nr 2.4816 · Nicrofer 7216
Inconel 600 fasteners — stud bolts, hex bolts, nuts and washers — available in this alloy. May be machined from ASTM B166 bar (UNS N06600), where applicable; finished fastener requirements are to the purchase specification or project drawing. Dimensions to ASME B18 where applicable, or your drawing. State the finished fastener specification your project requires on the order. It is a nickel–chromium–iron alloy, chosen for high-temperature oxidation, caustic and nuclear service. Kanak Steel & Engineering Co. manufactures, trades and exports it from Mumbai; EN 10204 3.1 or 3.2 certificates are available on request / as specified in the PO. Markets we have supplied to include Oman, UAE, Saudi Arabia, Brazil, Argentina, Spain and Chile (India is the home market).
- Stock & mill supply
- EN 10204 3.1 / 3.2
- PMI on request
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is Inconel 600 Fasteners?
Inconel 600 fasteners is a nickel–chromium–iron alloy supplied as fasteners (UNS N06600). May be machined from ASTM B166 bar (UNS N06600), where applicable; finished fastener requirements are to the purchase specification or project drawing. Buyers specify it for high-temperature oxidation, caustic and nuclear service. It is also sold as Alloy 600, UNS N06600, W.Nr 2.4816.
- What it is
- Nickel–chromium–iron alloy
- Material
- May be machined from ASTM B166 bar (UNS N06600), where applicable; finished fastener requirements are to the purchase specification or project drawing
- Feedstock (bar)
- ASTM B166, where applicable
- Dimensions
- ASME B18.2.1 · B18.2.2 · B18.31.2
- Threads
- UNC · UN-8 · metric
- Sizes
- M10 – M64 · ½" – 4"
- Best at
- High-temperature oxidation, caustic and nuclear service
Inconel 600 Fasteners Specification & Sizes
| Material | May be machined from ASTM B166 bar (UNS N06600), where applicable; finished fastener requirements are to the purchase specification or project drawing |
|---|---|
| Material / feedstock | ASTM B166 — a bar specification, where applicable; it covers the bar, not the finished fastener |
| Manufacturing route | By type: bolts, studs, cap screws and nuts may be machined from bar, where applicable; threaded rod, U-bolts, eye bolts, anchor and foundation bolts are route-dependent; washers not asserted — all to the purchase specification or project drawing |
| Dimensional standards | ASME B18.2.1 (bolts) · B18.2.2 (nuts) · B18.31.2 (studs) · DIN 931 / 933 / 934 (legacy DIN) |
| Types | Stud bolt · Hex bolt · Heavy hex nut · Hex nut · Washer · Threaded rod · U-bolt · Eye bolt · Anchor bolt · Foundation bolt · Socket head cap screw · Machine screw |
| Threads | UNC, UN-8 and metric coarse |
| Coating | Plain · PTFE on request |
| Documents | EN 10204 3.1 |
Inconel 600 Stud Bolts: Grade & Nut Pairing
Inconel 600 studs and nuts may be machined from ASTM B166 bar, where applicable; the finished fastener specification is to the purchase specification or project drawing, and the nut is usually the same alloy.
Torque (T = K × F × d), stud length and coatings are covered in the fasteners guide.
| Galling | Stainless and nickel-alloy threads gall — always use anti-seize, and avoid high-speed tightening |
|---|---|
| Coatings | Usually supplied plain; PTFE coating on request to ease tightening |
| Marking | Grade symbol and maker's mark on each stud end and nut, as the standard requires |
| Certificates | EN 10204 3.1 for the bar heat; mechanical test reports on the finished bolts on request |
Inconel 600 Fasteners Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Nickel (+Co) | As specified |
| Chromium | As specified |
| Iron | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Copper | As specified |
| Sulphur | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM B168 for UNS N06600.
Inconel 600 Fasteners Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM B168 for UNS N06600 — Annealed plate.
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 8.47 g/cm³ |
| Melting range | 1354 – 1413 °C |
| Magnetic | Non-magnetic |
Inconel 600 Equivalent Grades
Six-digit Harmonized System heading (nickel alloy, chapter 75). Your country adds its own digits — confirm with your customs broker. All HS codes.
How to Verify Inconel 600 Fasteners with PMI
Positive material identification with a handheld XRF gun confirms the alloy on the piece itself, in seconds, before it is cut or welded. Inconel 600 is most often mixed up with Incoloy 800 / 800H / 800HT — the table shows which elements tell them apart.
Handheld XRF does not measure carbon or nitrogen; those come from the mill certificate or optical emission (OES) testing. PMI can be arranged on request — state it on your enquiry.
Under technical review for TDS.
| Element | Inconel 600 | Incoloy 800 / 800H / 800HT |
|---|---|---|
| Nickel | As specified | As specified |
| Chromium | As specified | As specified |
| Copper | As specified | As specified |
| Titanium | — | As specified |
| Iron | As specified | As specified |
| Manganese | As specified | As specified |
Inconel 600 fasteners by type
Inconel 600 Fasteners Applications
Inconel 600 is specified when the cheaper grade will not survive the service but a higher alloy would be more than the job needs. These are the jobs our buyers use it for.
Inconel 600 Fasteners vs 310S, 800 and 625
| Grade | Fasteners standard | PREN (approx.) | Pick it when |
|---|---|---|---|
| Incoloy 800 / 800H / 800HT | May be machined from ASTM B408 bar (UNS N08800), where applicable; finished fastener requirements are to the purchase specification or project drawing | — | Furnaces, petrochemical heaters and high-temperature piping |
| Inconel 600 | May be machined from ASTM B166 bar (UNS N06600), where applicable; finished fastener requirements are to the purchase specification or project drawing | — | High-temperature oxidation, caustic and nuclear service |
| SS 310 / 310S | May be machined from ASTM A276 / A479 bar (UNS S31008), where applicable; finished fastener requirements are to the purchase specification or project drawing | ≈ 25 | Furnaces, burners and heat treatment at high temperature |
| Inconel 625 | ASTM F468 (N06625) where specified for applicable bolts, hex cap screws, socket-head cap screws and studs (0.250–1.500 in.), and ASTM F467 for applicable nuts (0.250–1.500 in.); for other types, material may be supplied to ASTM B446 bar where applicable, subject to the purchase specification | ≈ 51 | Seawater, high strength and high temperature in one alloy |
PREN = Cr + 3.3 Mo + 16 N, from mid-range chemistry. A screening guide, not a substitute for corrosion data on your medium.
Inconel 600 Corrosion Resistance — Element by Element
Each alloying addition has a job. Knowing which one protects against your medium is the quickest way to judge whether 600 fits.
Very high nickel content makes 600 practically immune to chloride stress-corrosion cracking and very good in caustic soda.
Chromium gives oxidation resistance to about 1175 °C.
Resists carburising and nitriding atmospheres in furnaces.
Not a first choice for sulphuric or hydrochloric acid — see 825 or C276.
How your 600 fasteners order runs
- 01Enquiry review — we confirm size, standard edition and documents against your MR or drawing.
- 02Heat selection & PMI — the mill certificate is checked against your order; PMI can be arranged depending on product and requirements, as specified in the PO.
- 03Processing — cutting, machining or bevelling to your specification, with heat numbers marked as specified in the PO.
- 04Inspection — your third-party inspector witnesses, or we share photos and test reports.
- 05Packing & dispatch — seaworthy packing from Nhava Sheva (JNPT), Mumbai, FOB or CIF, documents sent before the vessel sails.
Standards on this page
Welding & Fabricating Inconel 600 Fasteners
Inconel 600 welds by all common arc processes. A few points our buyers ask about:
| Matching filler | ERNiCr-3 (AWS A5.14) |
|---|---|
| Over-alloyed filler | ENiCrFe-3 electrode |
| Preheat | Not required; keep interpass temperature low |
| Cutting | Thermal or abrasive cutting; grind off heat-tinted edges before welding |
Follow your approved WPS; this is general guidance. See also 600 fittings and 600 flanges for the matching pipe-system parts.
How to Order Inconel 600 Fasteners: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Fastener type, size and length
- Thread form
- Material and marking
- Quantity in sets
- Certificate type
- Delivery port and date
Inconel 600 fasteners — questions buyers ask
Is Inconel 600 the same as Alloy 600?
Alloy 600, UNS N06600, W.Nr 2.4816 are names used for Inconel 600 (W.Nr / EN numbers and older UNS variants are the closest designations; their limits can differ slightly, so specify the UNS number and ASTM grade on the order). Whichever name is on the enquiry, fasteners: may be machined from ASTM B166 bar (UNS N06600), where applicable.
Why use Inconel 600 bolts instead of B7 carbon steel?
On Inconel 600 flanges in corrosive service, carbon-steel bolts corrode first. Matching-alloy bolting avoids galvanic corrosion and bolt failure.
What nut goes with Inconel 600 stud bolts?
Usually a heavy hex nut in the same Inconel 600 alloy — it may be machined from ASTM B166 bar, where applicable; finished requirements are to the purchase specification or project drawing.
How do I stop Inconel 600 bolts galling?
Use an anti-seize compound on threads and nut faces, tighten at moderate speed, and do not reuse galled nuts.
Inconel 600 or Inconel 625 — which should I choose?
Inconel 600 is chosen for high-temperature oxidation, caustic and nuclear service. Inconel 625 is the step up when you need more pitting resistance or strength. See the comparison table on this page, or ask us with your process conditions.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026