 NICKEL-CHROMIUM-IRON-MOLYBDENUM ALLOY FLANGES MANUFACTURER & SUPPLIER.webp)
Hastelloy X (Alloy X) Nickel-Chromium-Iron-Molybdenum Alloy Flanges Manufacturer & Supplier
Metinox Overseas is among the leading manufacturers and distributors of Hastelloy X (Alloy X) Nickel-Chromium-Iron-Molybdenum Alloy Flanges which is commonly known as the best high-temperature alloy in the gas turbine engines and in the industrial furnace. The product is of excellent resistance to oxidation, extreme temperature strength and fabricability, with excellent resistance to stress-corrosion cracking in petrochemical environments and excellent performance in oxidising, reducing and neutral atmospheres. Our ASTM B564 UNS N06002 forged flanges consist of a solid solution strengthened superalloy comprising of nickel (balance, minimum 47), chromium (20.5-23.0), iron (17.0-20.0), molybdenum (8.0-10.0), cobalt (0.5-2.5) and controlled carbon (0.05-0.15). This composition delivers unprecedented retention of high-temperature strength and oxidation resistance to temperatures of up to 1200-C (2200-F) and high ductility following lengthy usage.
The flanges are designed to suit the highest-temperature service requirements with the lowest possible temperature; between cryogenic temperature to 1200-C in oxidising environments. Their products are used in applications like gas turbine engines - combustion-zone components, transition ducts, combustor cans, spray bars, flame holders, afterburners, and tailpipes, industrial furnaces - to furnace rolls, trays, retorts, and muffles, petrochemical processing, - pyrolysis tubes, catalyst-support grids, and flash-drier products and aerospace, where a special combination of high temperature oxidation resistance, thermal-fatigue strength, outstanding resistance to carburisation and nitriding.
Table of Contents
- Hastelloy X Flanges Technical Specifications
- Hastelloy X Equivalent Grades
- Hastelloy X Chemical Composition
- Mechanical Properties of Hastelloy X Flanges
- Hastelloy X Flange Dimensions & Pressure Rating Chart
- Types of Hastelloy X Flanges Available
- Standard Flange Sizes & Weight Chart
- Is Hastelloy X Good Quality for Gas Turbine and High-Temperature Oxidation Service?
- Heat Treatment & Testing Requirements
- Hastelloy X Nickel-Chromium-Iron-Molybdenum Alloy Flanges Price List 2026
- Applications of Hastelloy X Flanges in Industry
- Why Choose Hastelloy X Flanges from Metinox Overseas?
- Hastelloy X Flange Delivery Time & CIF Pricing by Country
- Other Types of Hastelloy X Flanges
- People Also Search For
- Frequently Asked Questions (FAQ)
Hastelloy X Flanges Technical Specifications
| Feature | Details |
| Specifications | ASTM B564 / ASME SB564 / AMS 5754 / AMS 5536 |
| Grade | UNS N06002 (Hastelloy X, Alloy X, Inconel HX) |
| Material Designation | Nickel-Chromium-Iron-Molybdenum Alloy (Ni-Cr-Fe-Mo) |
| UNS Number | N06002 |
| Werkstoff Number | 2.4665 |
| Dimensional Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, MSS SP-44 |
| Size Range | 1/2" (15 NB) to 60" (1500 NB) |
| Pressure Class | 150#, 300#, 400#, 600#, 900#, 1500#, 2500# (B16.5); 75#, 150#, 300#, 400#, 600#, 900# (B16.47) |
| Flange Types | Weld Neck, Slip-On, Blind, Socket Weld, Lap Joint, Threaded, Orifice, Long Weld Neck, Reducing |
| Flange Face | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Male & Female, Tongue & Groove |
| Manufacturing Type | Hot Forged |
| Microstructure | Austenitic (FCC) Solid Solution Strengthened |
| Heat Treatment | Solution Annealed at 1175-1180-C + Rapid Air Cool (Mandatory) |
| Testing | Tensile, Hardness, Stress Rupture, PMI, Ultrasonic |
| Inspection | Third Party Inspection by TUV, SGS, Bureau Veritas, Lloyd's, DNV GL, BV, ABS |
| Certifications | EN 10204 3.1B MTC, AMS 5754, PED 2014/68/EU, CE Marked, ASME B31.3 |
Hastelloy X Equivalent Grades
| Standard | USA | Germany | Europe | Japan | UK | China |
| Hastelloy X | UNS N06002 | 2.4665 | 2.4665 | NCF 600H | - | GH3536 |
| ASTM B564 N06002 | NiCr22Fe18Mo9 | NiCr22Fe18Mo9 | GH536 | |||
| Alloy X | W.Nr. 2.4665 | |||||
| Inconel HX | AMS 5754 / AMS 5536 |
Note: Hastelloy X is manufactured to AMS and ASTM specifications. Equivalent designations include Alloy X, Inconel HX, and Nicrofer 4722.
Hastelloy X Chemical Composition
The detailed composition of this material is given in the following table.
| Element | Composition (%) | Function |
| Nickel (Ni) | 47.0 minimum (balance) | Base element, provides high-temperature strength and oxidation resistance |
| Chromium (Cr) | 20.5 - 23.0 | Outstanding oxidation resistance and hot corrosion resistance |
| Iron (Fe) | 17.0 - 20.0 | Contributes to solid solution strengthening and cost optimization |
| Molybdenum (Mo) | 8.0 - 10.0 | High-temperature strength, carburization resistance |
| Cobalt (Co) | 0.5 - 2.5 | Enhances high-temperature strength and creep resistance |
| Tungsten (W) | 0.2 - 1.0 | Improves high-temperature strength and oxidation resistance |
| Carbon (C) | 0.05 - 0.15 | Controlled level for carbide strengthening at high temperatures |
| Manganese (Mn) | 1.0 max | Improves hot workability |
| Silicon (Si) | 1.0 max | Deoxidizer, controlled level |
| Aluminum (Al) | 0.50 max | Controlled as residual element |
| Titanium (Ti) | 0.15 max | Controlled as residual element |
| Boron (B) | 0.010 max | Grain boundary strengthening |
| Phosphorus (P) | 0.04 max | Minimized for hot workability |
| Sulfur (S) | 0.03 max | Minimized for hot workability |
| Copper (Cu) | 0.50 max | Controlled as residual element |
Mechanical Properties of Hastelloy X Flanges
The mechanical properties decide the shelflife of the material. The table below gives the information about the mechanical properties of Hastelloy X Flanges.
| Property | Requirement (Solution Annealed) | Testing Standard |
| Tensile Strength | 655 MPa (95 ksi) minimum | ASTM E8 |
| Yield Strength (0.2% offset) | 240 MPa (35 ksi) minimum | ASTM E8 |
| Elongation in 2" | 35% minimum | ASTM E8 |
| Hardness (Brinell) | 150-200 HB (typical) | ASTM E10 |
| Hardness (Rockwell B) | 75-85 HRB (typical) | ASTM E18 |
| Stress Rupture (1200-F, 40 ksi) | 23 hours minimum | AMS 5754 |
| Stress Rupture (1600-F, 6 ksi) | 23 hours minimum | AMS 5754 |
| Density | 8.22 g/cm- (0.297 lb/in-) | - |
Hastelloy X Flange Dimensions & Pressure Rating Chart
Pressure-Temperature Ratings for Hastelloy X Flanges (ASTM B564 N06002)
| Temperature -F (-C) | Class 150 | Class 300 | Class 600 | Class 900 | Class 1500 | Class 2500 |
|---|---|---|---|---|---|---|
| -20 to 100 (-29 to 38) | 285 psi | 740 psi | 1480 psi | 2220 psi | 3705 psi | 6170 psi |
| 200 (93) | 260 psi | 675 psi | 1350 psi | 2025 psi | 3375 psi | 5625 psi |
| 400 (204) | 233 psi | 604 psi | 1208 psi | 1813 psi | 3021 psi | 5035 psi |
| 600 (316) | 205 psi | 532 psi | 1064 psi | 1596 psi | 2660 psi | 4434 psi |
| 800 (427) | 177 psi | 459 psi | 919 psi | 1378 psi | 2297 psi | 3828 psi |
| 1000 (538) | 150 psi | 389 psi | 778 psi | 1167 psi | 1945 psi | 3242 psi |
| 1200 (649) | 122 psi | 317 psi | 634 psi | 951 psi | 1585 psi | 2642 psi |
| 1400 (760) | 95 psi | 246 psi | 493 psi | 740 psi | 1233 psi | 2055 psi |
| 1600 (871) | 72 psi | 187 psi | 375 psi | 562 psi | 937 psi | 1562 psi |
| 1800 (982) | 55 psi | 143 psi | 286 psi | 429 psi | 715 psi | 1192 psi |
| 2000 (1093) | 40 psi | 104 psi | 208 psi | 312 psi | 520 psi | 867 psi |
Types of Hastelloy X Flanges Available
Hastelloy X Orifice Flange
Hastelloy X Threaded Flange
Hastelloy X Reducing Flange
Hastelloy X Lap Joint Flange
Hastelloy X Long Weld Neck Flange
Hastelloy X Socket Weld Flange
Hastelloy X Weld Neck Flange
Hastelloy X Blind Flange
Hastelloy X Slip-On Flange
Standard Flange Sizes & Weight Chart
Hastelloy X Weld Neck Flange Dimensions (ANSI B16.5) - Class 600 (Sample)
| NPS | OD (mm) | Thickness (mm) | Bore (mm) | Hub Dia (mm) | Bolt Circle (mm) | No. of Bolts | Bolt Dia | Approx Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 95 | 16 | 21 | 41 | 66 | 4 | M16 | 0.84 |
| 1" | 124 | 21 | 33 | 57 | 89 | 4 | M19 | 1.74 |
| 2" | 165 | 25 | 60 | 84 | 127 | 8 | M19 | 3.80 |
| 4" | 273 | 32 | 114 | 146 | 216 | 8 | M25 | 12.3 |
| 6" | 356 | 38 | 168 | 210 | 270 | 12 | M25 | 26.4 |
| 8" | 419 | 41 | 219 | 270 | 330 | 12 | M28 | 41.9 |
| 10" | 508 | 48 | 273 | 330 | 403 | 16 | M32 | 72.0 |
| 12" | 559 | 52 | 324 | 381 | 476 | 20 | M32 | 97.9 |
| 16" | 711 | 64 | 419 | 495 | 603 | 20 | M38 | 184.7 |
| 20" | 838 | 70 | 508 | 603 | 724 | 24 | M38 | 284.9 |
| 24" | 991 | 78 | 610 | 705 | 838 | 24 | M45 | 423.0 |
Is Hastelloy X Good Quality for Gas Turbine and High-Temperature Oxidation Service?
Several nickel based superrefinements are popularly used in gas turbines and high temperature industry, namely Hastelloy X (Alloy X, UNS N06002). It offers an excellent blend of oxidation safety up to 1200-C (2200-F) and high-temperature strength and creep, exceptional thermal-fatigue behavior, high fabricability, and strong resistance to stress-corrosion crack in petrochemical applications. Its operation has been demonstrated in oxidizing, reducing and neutral atmospheres. Hastelloy X, invented in the 1950s, is now the standard in the gas-turbine combustion-zone components, as well as the extreme temperature capability and structural integrity of industrial-furnace applications.
This balanced structure of chromium (20.5-23%), molybdenum (8-10%), iron (17-20%), cobalt (0.5-2.5%), and tungsten (0.2-1.0%) gives Hastelloy X high-temperature performance of the highest level. The excellent oxidation resistance is due to the large amount of chromium which forms a protective adhesive layer of chromium-oxide which is stable even at 1200-C. The additions of molybdenum and tungsten are used to give solid-solution strengthening and thus improving high-temperature creep strength and stress-rupture properties. The regulated carbon level (0.05-0.15%) provides strengthening of carbide at high temperature without excessive grain-boundary precipitation which would otherwise lower ductility.
Numerous years of service and intensive testing prove that Hastelloy X performs better in high-temperature oxidation conditions. Samples subjected to dry air 1095-C (2000-F) and pressurized dry air 300 psi and 955-C (1750-F) show a small weight change and insignificant depth of corrosion-penetration, due to the development of the protective oxide film. Hastelloy X furnace rolls have been demonstrated to be in great condition following 8700 hours of service at 1175-C (2150-F), thus indicating superior long-term oxidation resistance and strength.
The first benefit of Hastelloy X to be noted is that it has an outstanding resistance to carburization and nitriding, both of which are typical high-temperature degradation processes that can lead to premature failure in most alloys. When the four competing materials were subjected to 100 hours in petroleum coke at high temperature, carburization had totally penetrated them but, in Hastelloy X, there was no carburization at all. Maintaining a mixture of hydrogen, nitrogen, and ammonia at 595-C (1100-F) and 25000 psi in 64 days, Hastelloy X grew a nitride layer only a quarter-thickness of the finest competing alloy, and no intergranular attack occurred.
Hastelloy X retains outstanding strength and ductility after an extended period in the presence of high temperatures. It is shown that the alloy retains good ductility at 16000 hours at 650-C (1480-F), 760-C (1527-F), and 870-C (1600-F). This thermal stability is a guarantee that components maintain their integrity throughout their cyclic heating-service lifestyles. The alloy also has good thermal-fatigue resistance which is important in components of gas turbines that are subjected to high and low temperatures very fast during start-up, operation, and shutdown cycles.
Hastelloy X found use in petrochemical processes has been discovered to be highly resistant to stress-corrosion cracking making it invaluable to petrochemical components exposed to sulfur-rich environments, hydrocarbon-processing atmospheres and other aggressive petrochemical environments at high temperatures. The alloy is well resistant to oxidizing, reducing and neutral atmosphere, thus giving it a variety of operation environments.
Hastelloy X has good fabricability. The alloy has excellent forming and welding properties, has easy forging and hot-working at 1750-C (2500-F), and is cold-workable due to its excellent ductility. GTAW, GMAW, SMAW, and resistance-welding Welding with ERNiCrMo-2 filler metal is possible using resistance-welding methods, GTAW, and both GMAW and SMAW (AWS A5.14). It does not need preheat and post-weld heat treatment is not normally necessary making it easy to fabricate complex components.
Hastelloy is a resistive alloy with critical applications which include: gas-turbine engines (combustion-zone transition ducts, combustor cans, spray bars, flame holders, turbine blades and vanes in some uses, afterburners, tailpipes, cabin heaters), industrial furnace (furnace rolls, trays, retorts, muffles, catalyst-support grids, baffles), aerospace (jet-engine components, rocket-motor components), and power (combustion-system components).
ASME Section 1 Division 1 covers the alloy using specifications SB-366, SB-435, SB-572, SB-619, SB-622, and SB-626 on the different forms of the product. AMS 5754 defines sheet, plate and strip having specific stress-rupture requirements, to assure high-temperature operation. The popularity, massive database of property, established service record, and supply all place Hastelloy X in the position of the default selection in the service of high temperature oxidation, as far as 1200 degrees centigrade.
Heat Treatment & Testing Requirements
Heat Treatment Requirements (Mandatory):
| Process | Step / Parameter | Requirement | Remarks |
| Solution Annealing + Rapid Cooling | Solution Annealing Temperature | 1175-1180-C (2150-F) | Optimal for solid solution strengthening |
| Holding Time | Adequate soaking | Based on section thickness, typically 30+ min | |
| Cooling After Annealing | Rapid air cool | Rapid cooling maintains optimal properties | |
| Bright Annealing | Hydrogen atmosphere cooling | Optional for bright finish products | |
| Critical Requirement | Avoid low temperature annealing | Do not anneal below 1175-C | Lower temperatures cause secondary phase precipitation |
Testing & Inspection Requirements (Comprehensive):
| Test / Inspection | Standard / Requirement | Acceptance / Remarks |
| Tensile Testing | ASTM E8 | Yield = 35 ksi (240 MPa), Tensile = 95 ksi (655 MPa), Elongation = 35% |
| Stress Rupture Testing | AMS 5754 | 1200-F / 40 ksi = 23 hrs, 1600-F / 6 ksi = 23 hrs (for AMS material) |
| Hardness Testing | ASTM E10 / ASTM E18 | Typical 150-200 HB (75-85 HRB), Maximum per AMS 5754 |
| PMI Testing | Positive Material Identification | Ni = 47%, Cr 20.5-23%, Fe 17-20%, Mo 8-10% |
| Ultrasonic Testing | ASTM A388 | Mandatory for critical gas turbine applications |
| High-Temperature Oxidation | Exposure testing (optional) | Verification of oxidation resistance at service temperature |
Hastelloy X Nickel-Chromium-Iron-Molybdenum Alloy Flanges Price List 2026
| Flange Type | Size Range | Pressure Class | Indicative Price Range (USD / Piece) |
|---|---|---|---|
| Weld Neck (WN) | 1/2" - 2" | 150# | $155 - $385 |
| Weld Neck (WN) | 4" - 8" | 150# | $645 - $2,425 |
| Weld Neck (WN) | 10" - 24" | 150# | $3,850 - $13,850 |
| Weld Neck (WN) | 1/2" - 2" | 300# | $235 - $565 |
| Weld Neck (WN) | 4" - 8" | 300# | $975 - $3,505 |
| Weld Neck (WN) | 10" - 24" | 300# | $5,555 - $19,950 |
| Weld Neck (WN) | 1/2" - 2" | 600# | $345 - $825 |
| Weld Neck (WN) | 4" - 8" | 600# | $1,525 - $5,255 |
| Slip-On (SO) | 1/2" - 2" | 150# | $132 - $315 |
| Slip-On (SO) | 4" - 8" | 150# | $535 - $1,955 |
| Blind (BL) | 1/2" - 2" | 150# | $118 - $285 |
| Blind (BL) | 4" - 8" | 150# | $555 - $2,195 |
| Socket Weld (SW) | 1/2" - 2" | 150# - 600# | $168 - $715 |
Applications of Hastelloy X Flanges in Industry
The Hastelloy X Nickel-Chromium-Iron-Molybdenum Alloy Flanges are commonly used in many industrial applications, and some of the common industries are given below.
Gas Turbine Engines
Combustion zone transition ducts, combustor cans, spray bars, flame holders
Aerospace
Jet engine afterburners, tailpipes, turbine components, cabin heaters, rocket motor parts
Industrial Furnaces
Furnace rolls, trays, retorts, muffles, heat treatment fixtures
Petrochemical
Pyrolysis tubes for ethylene production, flash drier components, catalyst support grids
Chemical Processing
High-temperature reactors, furnace baffles, heat exchangers
Power Generation
Combustion system components, ducting, high-temperature piping
Heat Treatment
Furnace components requiring oxidation resistance to 1200-C
High-Temperature Service
Applications requiring carburization and nitriding resistance
Why Choose Hastelloy X Flanges from Metinox Overseas?
Metinox Overseas sells certified Hastelloy X (Alloy X) nickel chromium iron molybdenum alloy flanges, which have gone through a precise solution annealing process, 1175-1180-C, followed by quick cooling in air and extensive testing, including stress-rupture testing of gas-turbine engines and high-temperature oxidation service, to 1200-C. Our products in compliance with ISO 9001:2015, and AMS 5754 approval and has the full heat-treatment records of PED-certified manufacturing plants.
Each of the flanges is accompanied by EN 10204 3.1B Mill Test Certificates which have full chemical analysis (Ni =47%, Cr 20.5-23%, Fe 17-20%, C 0.05-0.15%) plus complete tensile properties (Tensile =95 ksi, Yield =35 ksi, Elongation =35%) and stress-rupture testing in accordance with AMS 5754 requirements, hardness inspection, and PMI inspection.
Our technical division provides professional services with respect to specification of Hastelloy X as gas-turbine burner areas, industrial furnace fabricators, petrochemical pyrolysis customer care, welding, (AWS A5.14 ERNiCrMo-2 filler metal) and compliance of ASME Section II, and extends to the aerospace manufacturers, gas-turbine OEMs, industrial furnace builders, petrochemical facility and high-temperature service.
Hastelloy X Flange Delivery Time & CIF Pricing by Country
| Destination Region | Major Ports / Cities | Estimated Delivery Time | Typical CIF Terms |
|---|---|---|---|
| Middle East (GCC) | Dubai, Dammam, Doha | 14-18 Days | CIF Dubai / CIF Dammam |
| Europe | Rotterdam, Hamburg | 28-35 Days | CIF Rotterdam / CIF Hamburg |
| USA & Canada | Houston, New York | 35-45 Days | CIF Houston / CIF New York |
| Southeast Asia | Singapore, Port Klang | 18-25 Days | CIF Singapore / CIF Port Klang |
| Africa | Lagos, Durban | 25-35 Days | CIF Lagos / CIF Durban |
Other Types of Hastelloy X Flanges
ASTM B564 N06002 Flanges, UNS N06002 Weld Neck Flanges, Hastelloy X Blind Flanges, Alloy X Gas Turbine Flanges, Hastelloy X High-Temperature Flanges, Inconel HX Oxidation Resistant Flanges.
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Frequently Asked Questions (FAQ)
We are regularly certified to ISO 9001:2015, AMS 5754-approved and PED-certified. The Hastelloy X flanges are provided with EN 10204 3.1 Mill Test Certificates, and they contain stress-rupture testing of gas turbines.
Solution annealing of the material takes place at temperatures between 1175-1180-C, and it is finally cooled by air. We perform PMI, tensile test, which has minimum required strength of 95 ksi, hardness test and AMS 5754 stress rupture test at 1200-F/40 ksi and 1600-F/6 ksi respectively.
Applications of the alloy are in gas turbine combustion areas, such as transition ducts, combustor cans, and spray bars, in industrial furnace parts, petrochemical pyrolysis tubes, jet-engine components in aerospace, and in high-temperature oxidation service up to 1200-C.
Apply AWS A5.14 ERNiCrMo-2 filler metal. It does not need pre-heat, and the interpass temperature must not exceed 93-C. Hastelloy X has a high level of weldability and in most cases, post-weld heat treatment is not needed.
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