Tesco Steel & Engineering manufactures Inconel 600 flanges (UNS N06600 / W.Nr. 2.4816) — the classic nickel-chromium-iron alloy with ~76% Ni, ~15.5% Cr and ~8% Fe. Its high nickel gives outstanding resistance to chloride stress-corrosion cracking, reducing conditions and dry chlorine at elevated temperature, while the chromium adds oxidation and sulphur resistance. Non-age-hardenable, it stays strong and tough from cryogenic temperatures to ~1095°C. Available in weld neck, slip-on, blind, socket-weld, threaded, lap-joint, spectacle and orifice types to ASTM B564 / ASME B16.5. Class 150 to 2500, NPS 1/2″ to 24″, PN6 to PN400. ISO 9001:2015 certified. Made in India.
Inconel 600 (UNS N06600) Flanges
Inconel 600 Weld Neck & Blind Flanges
Tesco Steel & Engineering manufactures Inconel 600 flanges in all types from weld neck to orifice, Class 150 to 2500 — supplied with EN 10204 3.1 / 3.2 certification, PMI and third-party inspection on request. Explore the wider Inconel flange range, the higher-oxidation Inconel 601 flanges and Inconel 625 flanges, and the flange dimension charts.
| Inconel 600 flanges are available in the following specifications: | |
|---|---|
| Material Grade | Inconel 600 / UNS N06600 / W.Nr. 2.4816 (NiCr15Fe) |
| Alloy Type | Nickel-chromium-iron alloy (Ni-Cr-Fe), non-age-hardenable |
| Size | 1/2″ NB to 24″ NB (DN 15 to DN 600); larger to ASME B16.47 |
| Class / Rating | 150#, 300#, 600#, 900#, 1500#, 2500# · 3000#, 6000#, 9000# (socket-weld / threaded) |
| Pressure Ratings | PN 6 – PN 400 (PN6, 10, 16, 25, 40, 64, 100, 160, 250, 320, 400) |
| Material Standards | ASTM B564, ASME SB564, AMS 5665; EN designation 2.4816 |
| Dimensional Standards | ASME B16.5, ASME B16.47 (Series A & B), MSS SP-44, DIN EN 1092-1 |
| Flange Types | Weld Neck (WNRF), Slip-On (SORF), Blind, Socket Weld (SWRF), Lap Joint, Threaded / Screwed, Spectacle Blind, Long Weld Neck, Orifice, Plate |
| Flange Faces | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue & Groove (T&G) |
| Weld Filler | ERNiCr-3 (FM 82) / ENiCrFe-3 (AWS A5.14 / A5.11) |
| Testing | PMI, hydrostatic, UT, MT/PT per spec; EN 10204 3.1 / 3.2 |
Inconel 600 is a high-nickel alloy with chromium for oxidation/sulphur resistance and a controlled iron content. The high nickel base is the key to its chloride stress-corrosion cracking resistance and its stability across a very wide temperature range.
| Element | Inconel 600 (UNS N06600) |
|---|---|
| Nickel (Ni) | 72.0% min (~76% typical) |
| Chromium (Cr) | 14.0 – 17.0% |
| Iron (Fe) | 6.0 – 10.0% |
| Carbon (C) | 0.15% max |
| Manganese (Mn) | 1.0% max |
| Copper (Cu) | 0.5% max |
| Silicon (Si) | 0.5% max |
| Sulphur (S) | 0.015% max |
| Mechanical Property (annealed, typical) | Inconel 600 |
|---|---|
| Tensile Strength | 550 – 690 MPa (80–100 ksi) |
| Yield Strength 0.2% | 240 – 345 MPa (35–50 ksi) |
| Elongation | 35 – 45% |
| Max Service Temperature | ~1095 °C (2000 °F) |
| Density | 8.47 g/cm³ |
| Melting Range | 1354 – 1413 °C |
| Standard | Inconel 600 Designation |
|---|---|
| UNS (USA) | N06600 |
| Werkstoff (Germany) | 2.4816 |
| EN designation | NiCr15Fe |
| ASTM / ASME | B564 / SB564 (forgings); B166, B167, B168 (other forms) |
| AMS | 5665 / 5540 |
| Common names | Inconel 600, Alloy 600, Nickel Alloy 600 |
Inconel 600 Weld Neck Flange (WNRF)
Inconel 600 Slip-On Flange (SORF)
Inconel 600 Blind Flange
| Flange Type | Description & Inconel-600-Specific Use |
|---|---|
| Weld Neck (WNRF) | Tapered hub butt-welded to pipe for high-integrity, high-temperature and chloride service; weld with ERNiCr-3 filler. |
| Slip-On (SORF) | Fillet-welded over the pipe; common in chemical and high-temperature piping at moderate pressure. |
| Blind | Seals pipe ends and vessel nozzles in furnace, reactor and chloride-bearing systems. |
| Socket Weld (SWRF) | Small-bore (1/2″–2″) instrument and branch connections. |
| Lap Joint (LJRF) | Used with an Inconel 600 stub end where frequent dismantling is required; economizes on alloy in the backing ring. |
| Threaded (TRFF) | Internal NPT/BSP threads for non-welded low-pressure connections. |
| Spectacle Blind / Long Weld Neck | Isolation spades and nozzle/long-neck flanges in Inconel 600 for chloride and high-temperature duty. |
| Property | 600 (N06600) | 601 (N06601) | 625 (N06625) |
|---|---|---|---|
| Type | Ni-Cr-Fe | Ni-Cr-Fe + Al | Ni-Cr-Mo-Nb |
| Chromium | ~15.5% | ~23% | ~21.5% |
| Key strength | Chloride SCC + general purpose | High-temp / cyclic oxidation | Strength + broad corrosion (Mo+Nb) |
| Max temperature | ~1095°C | ~1250°C | ~980°C |
| Aqueous corrosion | Good | Good | Excellent |
| Typical role | General nickel alloy, chloride/HT | Furnace & oxidizing HT service | Seawater, acids, high strength |
High nickel content makes Inconel 600 highly resistant to chloride-ion stress-corrosion cracking that attacks stainless steels.
Retains strength and toughness from cryogenic temperatures up to ~1095°C, with good creep strength.
Excellent resistance to dry chlorine and hydrogen chloride at elevated temperature — a hallmark Alloy 600 application.
Non-age-hardenable and readily welded with ERNiCr-3 filler — no PWHT needed for strength.
| Industry | Typical Application |
|---|---|
| Heat Treatment & Furnaces | Retort, muffle and furnace flanged connections in oxidizing/carburizing atmospheres |
| Chemical Processing | Chlorination, organic-acid and caustic process flanges |
| Nuclear & Power | Steam-generator, reactor and high-purity-water flanged components |
| Food Processing | Corrosion-critical and high-purity flanged joints |
| Titanium Dioxide & Chemicals | Chloride-process and reactor flanges |
| Aerospace & Cryogenic | High- and low-temperature flanged connections |
Made from certified Alloy 600 with PMI verification of Ni, Cr and Fe — full chemistry confirmed on the MTC.
Manufactured to ASTM B564 / ASME B16.5 in the annealed condition for optimum corrosion resistance and ductility.
WNRF, SORF, blind, socket-weld, threaded, lap-joint, spectacle, LWN, orifice and plate — in RF, FF, RTJ and T&G.
EN 10204 3.1 / 3.2 MTC, heat/lot traceability, hydrostatic and third-party inspection on request.
Inconel 600 flange prices reflect the high nickel content plus forging and machining — it is a premium general-purpose nickel alloy for chloride and high-temperature service. Tesco Steel & Engineering offers competitive ex-works pricing from Mumbai with full export documentation and material traceability. Click Ask for Quote or message us on WhatsApp at +91 92233 66922 with flange type, size (NB), pressure class, quantity and documentation requirements.
Q1. What is an Inconel 600 flange?
An Inconel 600 flange is a pipe flange made from the nickel-chromium-iron alloy UNS N06600 (W.Nr. 2.4816) — about 76% nickel, 15.5% chromium and 8% iron. The high nickel gives outstanding resistance to chloride-ion stress-corrosion cracking, reducing conditions and dry chlorine at elevated temperature, while the chromium adds oxidation and sulphur resistance. Inconel 600 stays strong and tough from cryogenic temperatures to about 1095 degrees C. Flanges are forged to ASTM B564 and machined to ASME B16.5 / B16.47 dimensions.
Q2. What is the chemical composition of Inconel 600?
Inconel 600 (UNS N06600) nominal composition: nickel 72% minimum (typically ~76%), chromium 14–17%, iron 6–10%, with carbon 0.15% max, manganese 1% max, copper 0.5% max, silicon 0.5% max and sulphur 0.015% max. The nickel-chromium-iron balance is what gives the alloy its broad resistance and high-temperature stability.
Q3. What is Inconel 600 resistant to?
Inconel 600 resists chloride-ion stress-corrosion cracking (a key advantage of its high nickel content), many reducing and mildly oxidizing media, dry chlorine and hydrogen chloride at elevated temperature, caustic and high-purity water, and oxidizing/sulphur-bearing hot atmospheres. It is not intended for strong reducing acids like hot concentrated sulphuric, where a Hastelloy B/C grade is better.
Q4. What temperature can Inconel 600 flanges handle?
Inconel 600 retains useful strength and oxidation resistance from cryogenic temperatures up to about 1095 degrees C (2000 degrees F), with good creep and rupture strength at the upper end. This wide temperature range, together with its chloride-SCC resistance, makes it suitable for furnace, heat-treatment and high-temperature process flanged connections as well as cryogenic service.
Q5. What standards apply to Inconel 600 flanges?
Inconel 600 flanges are forged to ASTM B564 (UNS N06600) and machined to ASME B16.5 (1/2 inch to 24 inch) or ASME B16.47 / MSS SP-44 for larger sizes, with EN 1092-1 for PN-rated flanges. The European designation is W.Nr. 2.4816 / NiCr15Fe. Material is supplied with EN 10204 3.1 / 3.2 certification.
Q6. What is the difference between Inconel 600 and 601?
Both are nickel-chromium-iron high-temperature alloys. Inconel 600 (~15.5% Cr) is the general-purpose grade with excellent chloride-SCC and aqueous resistance plus high-temperature capability. Inconel 601 has higher chromium (~23%) and an aluminium addition for superior resistance to high-temperature oxidation and cyclic oxidation, so it is preferred for the hottest oxidizing/furnace service, while 600 is favoured for chloride and aqueous-plus-temperature applications.
Q7. Can Inconel 600 flanges be welded?
Yes. Inconel 600 has excellent weldability by GTAW (TIG), GMAW and SMAW using matching filler such as ERNiCr-3 (FM 82) / ENiCrFe-3. It is non-age-hardenable, so no post-weld heat treatment is generally required for strength; clean joints and controlled heat input give sound, corrosion-resistant welds.
Q8. Is Inconel 600 used in nuclear and chemical service?
Yes. Inconel 600 has a long history in nuclear (steam-generator and reactor components), chemical and food processing (resistance to chlorination and organic acids), heat-treatment equipment, and titanium-dioxide and caustic production. Its combination of chloride-SCC resistance and high-temperature strength makes it a versatile general-purpose nickel alloy.
Q9. What are the mechanical properties of Inconel 600?
Typical Inconel 600 properties in the annealed condition: tensile strength about 550–690 MPa (80–100 ksi), yield strength about 240–345 MPa (35–50 ksi), elongation about 35–45%, density 8.47 g/cm³. It combines good strength with excellent ductility and toughness across a wide temperature range.
Q10. Are Inconel 600 flanges supplied with material test certificates?
Yes. Every Inconel 600 flange is supplied with EN 10204 3.1 (or 3.2) mill test certificates confirming chemistry, mechanical properties and heat/lot traceability, with PMI, hydrostatic testing and third-party inspection on request. Tesco Steel & Engineering is an ISO 9001:2015 certified manufacturer and exporter from Mumbai, India.