Inconel 600 Flanges

Inconel 600 Flanges Supplier in Mumbai, India - ASTM B564 UNS N06600

Nicorex Alloys is a trusted supplier of Inconel 600 flanges in Mumbai, India. The alloy usually contains at least 72% nickel, 14-17% chromium, and 6-10% iron, and provides a minimum tensile strength of 550 MPa (80 ksi).

Inconel 600 flanges are ISO 9001 and ISO 14001 certified and are supplied with EN 10204/3.1B Mill Test Certificates (MTC) and Positive Material Identification (PMI). They combine high-temperature oxidation resistance to 1093°C (2000°F) with complete immunity to chloride-ion stress corrosion cracking. The 72% minimum nickel content eliminates the chloride SCC susceptibility that limits austenitic stainless steels, while 14-17% chromium forms a stable Cr₂O₃ scale for sustained oxidation and carburisation resistance. Because it combines excellent high‑temperature oxidation resistance with immunity to chloride stress‑corrosion cracking, Alloy 600 is a common choice for flanges in furnace piping, caustic alkali lines, and nuclear steam generator connections. UNS N06600 (Werkstoff 2.4816) flanges are made from forged material and come in several types, including weld neck (WNRF), blind (BLRF), slip-on (SORF), socket weld (SWRF), threaded, lap joint, long weld neck (LWN), and ring-type joint (RTJ).

Standard nominal pipe sizes range from 1/2″ to 24″, with larger sizes offered on request, and pressure ratings from Class 150 up to Class 2500. Alloy 600 contains no molybdenum, niobium, or tungsten, helping reduce cost while still offering strong high‑temperature and caustic resistance.

Inconel Alloy 600 Flanges Specifications

Key specifications of Inconel Alloy 600 flanges, covering size range, pressure ratings, flange types, facing options, and supply conditions:

Specification	ASTM B564 / ASME SB564
Size (ASME B16.5)	NPS 1/2” to NPS 24”
Size (ASME B16.47)	NPS 26” to NPS 60”
Pressure Classes	150, 300, 400, 600, 900, 1500, 2500
Face Types	RF, FF, RTJ, Tongue & Groove, Male & Female
Flange Types	WNRF, BLRF, SORF, SWRF, Threaded, Lap Joint, LWNRF, RTJ, Spectacle Blind, Reducing
Dimensional Standards	ASME B16.5, B16.47, B16.36, B16.48, MSS SP-44, EN 1092-1, JIS B2220

Chemical Composition of Inconel 600 Flanges

Chemical composition of Inconel 600 flanges as per ASTM B564 (UNS N06600), showing the alloying elements and their allowed ranges:

Element	Nickel (Ni)	Chromium (Cr)	Iron (Fe)	Carbon (C)	Manganese (Mn)	Silicon (Si)	Copper (Cu)	Sulphur (S)
Alloy 600	72.0 min	14.0 – 17.0	6.0 – 10.0	0.15 max	1.0 max	0.50 max	0.50 max	0.015 max

The simplicity of Inconel 600 (Ni-Cr-Fe without Mo, Nb, or W) keeps material cost below Inconel 625 and the Hastelloy C-family. Having at least 72% nickel helps protect the alloy from chloride stress‑corrosion cracking (SCC). Cr at 14-17% forms the protective oxide scale for oxidation resistance to 1093°C. Fe at 6-10% improves workability and reduces cost compared to higher-nickel alloys.

Mechanical Properties of ASTM B564 UNS N06600 Flange

Mechanical characteristics of UNS N06600 flanges, based on requirements for annealed forgings specified in ASTM B564:

Property	Tensile Strength (min)	Yield 0.2% Offset (min)	Elongation (min)	Hardness (max)	Density	Melting Range
Value	550 MPa (80 ksi)	240 MPa (35 ksi)	30%	88 HRB	8.47 g/cm³ (0.306 lb/in³)	1354-1413°C (2470-2575°F)

Alloy 600 keeps good strength at temperatures where austenitic stainless steels can no longer carry a load safely. At 540°C, Inconel 600 holds approximately 490 MPa tensile and 180 MPa yield, making it a reliable high-temperature flange material for furnace and reactor piping.

Inconel 600 Flanges Equivalent Grades

Explore the equivalent designations of Inconel 600 flanges, detailing standards and international material designations for precise cross‑reference.

UNS	Werkstoff	BS	DIN	JIS	GOST
N06600	2.4816	BS 3072/3076 NA14	17742, NiCr15Fe	NCF 600	МНЖМц 28-2,5-1,5

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Available Types of Inconel 600 Flanges

Nickel Alloy 600 flanges are forged to ASTM B564 in these types:

Inconel 600 Weld Neck Flange (WNRF)

Inconel 600 Slip-On Flange (SORF)

Inconel 600 Blind Flange (BLRF)

Inconel 600 Socket Weld Flange (SWRF)

Alloy 600 Threaded Flange

Inconel 600 Lap Joint Flange

Nickel Alloy 600 RTJ Flange

Inconel 600 Orifice Flange

Inconel 600 Spectacle Blind Flange

Inconel 600 Reducing Flange

Pressure-Temperature Rating of Inconel 600 Flanges - ISO / Metric (bar)

The table below shows the maximum allowable working pressure (in bar) for Inconel 600 flanges, from Class 150 to Class 2500. These values are based on ASME B16.5 (Material Group 3.7). They apply to ASTM B564 UNS N06600 forgings in annealed condition, for temperatures ranging from −29°C to 650°C.”

Temp. (°C)	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500
−29 to 38	20.0	51.7	68.9	103.4	155.1	258.6	430.9
50	19.5	51.7	68.9	103.4	155.1	258.6	430.9
100	17.7	51.5	68.7	103.0	154.6	257.6	429.4
150	15.8	50.3	66.8	100.3	150.6	250.8	418.2
200	13.8	48.6	64.8	97.2	145.8	243.4	405.4
250	12.1	46.3	61.7	92.7	139.0	231.8	386.2
300	10.2	42.9	57.0	85.7	128.6	214.4	357.1
325	9.3	41.4	55.0	82.6	124.0	206.6	344.3
350	8.4	40.3	53.6	80.4	120.7	201.1	335.3
375	7.4	38.9	51.6	77.6	116.5	194.1	323.2
400	6.5	36.5	48.9	73.3	109.8	183.1	304.9
425	5.5	35.2	46.5	70.0	105.1	175.1	291.6
450	4.6	33.7	45.1	67.7	101.4	169.0	281.8
475	3.7	31.7	42.3	63.4	95.1	158.2	263.9
500	2.8	28.2	37.6	56.5	84.7	140.9	235.0
538	1.4	16.5	22.1	33.1	49.6	82.7	137.9
550	—	13.9	18.6	27.9	41.8	69.7	116.2
575	—	9.4	12.6	18.9	28.3	47.2	78.6
600	—	6.6	8.9	13.3	19.9	33.2	55.3
625	—	5.1	6.8	10.3	15.4	25.7	42.8
650	—	4.7	6.3	9.5	14.2	23.6	39.4

Industrial Applications of Inconel 600 Flanges

Inconel 600 flanges perform reliably in harsh industrial environments, especially in nuclear, thermal, chemical, aerospace, and hygienic processing services.

Nuclear Power Generation: In nuclear plants, Inconel 600 flanges are used in steam generators, coolant piping, and containment joints, backed by many years of service in pressurised-water reactors.
Heat Treatment & Thermal Processing: In heat-treat furnaces, UNS N06600 flanges handle retorts, muffles, generator lines, and radiant tubes, resisting carburisation and oxidation up to 1093°C.
Chemical & Petrochemical Processing: In chemical plants, Alloy 600 flanges endure hot caustic NaOH, chlorinated solvents, and VCM service where carbon and stainless steels may crack.
Aerspace & Gas Turbines: In aerospace exhaust and turbine systems, Alloy 600 flanges tolerate extreme heat, oxidation, and repeated thermal cycling without distortion.
Food & Pharmaceutical Processing: In hygienic plants, Inconel 600 flanges handle hot caustic CIP, lye transfer, and alkaline cleaning lines while providing excellent corrosion resistance.

How to Order Inconel 600 Flanges from Nicorex Alloys

To order Inconel 600 Flanges, follow these 10 important steps:

Flange Type: WNRF / BLRF / SORF / SWRF / RTJ
Size: NPS and Schedule (½" to 24"+)
Pressure Class: 150 / 300 / 600 / 900 / 1500 / 2500
Face Type: RF / FF / RTJ / T&G
Material Grade: Inconel 600 / UNS N06600 / W.Nr. 2.4816
Quantity: Number of pieces or kg
Standard: ASME B16.5 / B16.47 / DIN EN 1092-1
Additional Requirements: NACE, PMI, IGC, solution annealed
Documentation: MTC 3.1/3.2, PMI, TPI Certificate
Delivery: Domestic / International (specify destination)

Frequently Asked Questions

What is the Maximum Service Temperature for Inconel 600 Flanges?

Maximum service temperature is 1093°C (2000°F) in oxidising conditions. Above 600°C, Inconel 600 loses some strength but still holds its shape and works reliably in furnace and heat‑treatment use.

What is the difference between Inconel 600 and 625 Flanges?

Inconel 625 contains molybdenum (8-10%) and niobium (3.15-4.15%), which gives it higher strength (690 MPa vs 550 MPa) and better resistance to acidic corrosion. Inconel 600 has a simpler nickel‑chromium‑iron composition, costs less, and is usually chosen for high‑temperature oxidation and caustic alkali service.

Are Inconel 600 Flanges suitable for Caustic Soda (NaOH)?

Yes. Inconel 600 is one of the best materials for concentrated NaOH at elevated temperatures. It resists caustic SCC that affects carbon steel and stainless steel flanges.

What Filler Metal is used for Welding Alloy 600 Flanges?

ERNiCr-3 (FM 82) for GTAW/GMAW; ENiCrFe-3 (Welding Electrode 182) for SMAW. No preheat required.

What is the Price of Inconel 600 Flanges in India?

Inconel 600 flanges in India typically range from ₹500 to over ₹2,500 per piece, depending on size, pressure rating, and quantity. On a weight basis, prices generally start around ₹950 per kg and may vary based on market conditions. Contact Nicorex Alloys for the latest pricing.

What ASTM Specification Covers Inconel 600 Forged Flanges?

ASTM B564 / ASME SB564 for forgings. Dimensional standard: ASME B16.5 (NPS 1/2”-24”).

Can Inconel 600 flanges be used in Nuclear Power Plants?

Yes. Alloy 600 has been used for many years in nuclear power plants, mainly in steam generators, reactor coolant systems, and containment piping.