Nandishwar Steel has supplied Inconel, Monel, and other high-nickel alloy products to Indian industry for
decades, with Inconel 600 Circles and Rings forming a core part of that stock. Every batch leaves our facility
with Modvatable invoicing, and our quality management system tracks each lot from raw material through the final
dimension. Refining and petrochemical plants, nuclear and thermal power stations, pulp and paper mills, sugar
factories, and breweries across the country source their Inconel 600 blanks and rings from us, in standard or
custom sizes covering ASTM B166, ASTM B168, and Inconel DIN 2.4816 grades.
What are Inconel 600 Rings and Circles
Inconel 600 is a nickel-chromium-iron alloy registered under UNS N06600, with nickel content at 72 percent
minimum and chromium between 14 and 17 percent. A Circle is a solid disc cut from forged billet or plate,
supplied as a blank before further machining into flanges, covers, or discs. A Ring is the same alloy with a
center bore already cut, ready for use in flanged assemblies, spacers, or rotating equipment without an
additional boring operation. Both forms share the same chemistry and the same resistance profile; the difference
lies entirely in geometry and the downstream machining step each one saves.
Key Features of Inconel 600 Rings and Circles
Inconel 600 stays non-magnetic across its full service range, which matters in instrumentation housings and
sensor mounts where magnetic interference would otherwise skew readings. Oxidation resistance holds up to
2000°F, and the bonding between grains resists degradation through repeated thermal cycling rather than
weakening after a handful of heat-cool runs. The alloy forms by both hot and cold working using standard shop
methods, and it welds without special filler restrictions in most joint configurations. Machinists cutting Alloy
600 Rings should run sulfur-based cutting oil during the operation, then strip it completely before welding or
any high-temperature step. Leftover sulfur migrates into the grain boundaries under heat and causes
embrittlement that shows up later as cracking. Standard diameters ship from inventory, and our forging and
cutting line produces custom sizes and shapes against drawing on request.
Applications of Inconel 600 Rings and Circles
Gas turbine components run on Inconel 600 because the alloy holds creep resistance at sustained low-temperature
service while tolerating thermal cycling without fatigue cracking. Petrochemical reactors use the rings and
circles as flange blanks and spacer plates where acid chloride and fresh water exposure would corrode standard
stainless steel within a few service cycles. Nuclear fuel assemblies and reactor internals depend on the same
corrosion resistance, since replacement downtime in that sector carries a cost far higher than the material
premium. Aerospace exhaust parts and heat shielding use the alloy's high chromium content to resist
carburization and scaling at sustained high heat. Pharmaceutical and pulp and paper processing lines specify
Inconel 600 wherever a fitting sits in continuous contact with corrosive process fluid and a failure would halt
the line.
Specifications of Inconel 600 Circles and Rings
Nandishwar Steel manufactures Inconel 600 Circles and Rings to the following dimensional and standard
requirements.
Standards: EN, DIN, JIS, ASTM, BS, ASME, AISI
Rings Diameter: 3" OD up to 48" OD Up to 900 lbs max
Circle Diameter: 3" DIA up to 38" DIA 1500 lbs max
Inconel 600 carries different designations depending on the standard a project specifies, listed below for
cross-reference.
STANDARD
UNS
WERKSTOFF NR.
GOST
BS
OR
EN
JIS
AFNOR
Inconel 600
N06600
2.4816
МНЖМц 28-2,5-1,5
NA 13
ЭИ868
NiCr15Fe
NCF 600
NC15FE11M
Chemical Composition of Inconel Grade Circles and Rings
Composition limits for Inconel 600 Circles and Rings, alongside related Inconel grades for comparison, appear
in the table below.
Grade
C
Mn
Si
S
Cu
Fe
Ni
Cr
Inconel 600
0.15 max
1.00 max
0.50 max
0.015max
0.50 max
6.00 – 10.00
72.00 min
14.00 – 17.00
Inconel 601
0.10 max
1.0 max
0.5 max
0.015 max
1.0 max
Balance
58.0 – 63.0
21.0 – 25.0
Inconel 625
0.10 max
0.50 max
0.50 max
0.015 max
-
5.0 max
58.0 min
20.0 - 23.0
Inconel 718
0.08 max
0.35 max
0.35 max
0.015 max
0.30 max
-
50.00 - 55.00
17.00 - 21.00
Other Grades We Stock
Nandishwar Steel keeps the following Inconel 600 variants in regular supply:
Inconel 600 Circles
ASTM B168 Alloy 600 Rings
Inconel Alloy 600 Rings
Inconel Alloy UNS N06600 Circles
600 Inconel Alloy Rings
Inconel DIN 2.4816 Rings
Alloy 600 Rings
We supply Modvat invoicing, allowing buyers to claim Modvat credit against the excise duty paid by the
manufacturer.
Frequently Asked Questions
Refining and petrochemical plants, nuclear and thermal power stations, pulp and paper mills, sugar
factories, breweries, and pharmaceutical manufacturing units all run Inconel 600 components in heat
exchangers, reactor internals, and furnace fixtures.
Circles are solid discs cut from plate or forged stock, used as blanks for flanges, covers, and discs. Rings
have a center bore already cut, supplied up to 48" OD and 900 lbs for direct use in flanged or rotating
assemblies.
Our material meets ASTM/ASME SB 168, SB 424, and SB 443.
Circles run from 3" to 38" in diameter at up to 1500 lbs each. Rings run from 3" to 48" OD at up to 900 lbs
each, supplied as forgings or plate cuts.
Yes. Our forging and cutting line produces non-standard diameters, thicknesses, and bore profiles to match
drawing specifications submitted with a purchase order.
Inconel 600 contains 72 percent minimum nickel, 14 to 17 percent chromium, 6 to 10 percent iron, with
carbon, manganese, silicon, sulfur, and copper held at low maximum limits as shown in the composition table
above.
Contact Nandishwar Steel for a quote on Inconel 600 Circles or Rings in your required diameter and grade.
