Physical properties
| Density | 8.3 | g/cm³ |
| Modulus E | 199 | GPa |
| Thermal conductivity | 12 | W/(m·K) |
| Thermal expansion | 14.2 | ×10⁻⁶/K |
| Specific heat | 0.42 | kJ/(kg·K) |
| Resistivity | 1.15 | Ω·mm²/m |
Informative values: they vary with composition, condition and test method. Use the governing standard or measured mill data for pressure and heat-transfer calculations.
Chemical composition
Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements7 elements | |||
| Ni | Nickel | Bal. | |
| Cr | Chromium | 20.5 – 23% | |
| Fe | Iron | 17 – 20% | |
| Mo | Molybdenum | 8 – 10% | |
| Co | Cobalt | 0.5 – 2.5% | |
| W | Tungsten | 0.2 – 1% | |
| C | Carbon | 0.05 – 0.15% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual4 elements | |||
| Si | Silicon | ≤ 1% | |
| Mn | Manganese | ≤ 1% | |
| P | Phosphorus | ≤ 0.04% | |
| S | Sulphur | ≤ 0.03% | |
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % | Other requirements and notes |
|---|---|---|---|---|---|
| Bar and forgings | |||||
| Bar and rod | Annealed | ≥ 660 (96 ksi) | ≥ 240 (35 ksi) | ≥ 35 | |
| Plate, sheet and strip | |||||
| Plate, sheet and strip | Annealed and descaled | ≥ 655 (95 ksi) | ≥ 240 (35 ksi) | ≥ 35 | |
| Tube and pipe | |||||
| Seamless pipe and tube | Solution annealed and descaled | ≥ 690 (100 ksi) | ≥ 276 (40 ksi) | ≥ 35 | |
| Welded pipe and tube | Solution annealed | ≥ 690 (100 ksi) | ≥ 276 (40 ksi) | ≥ 35 | |
| Fittings and flanges | |||||
| Fittings (factory-made wrought butt-weld / socket) | 2150 °F [1177 °C] minimum, rapid air or water quench | — | — | — | Tensile properties follow the starting material. No tension test on the finished fitting unless agreed. Minimum temperature. |
| Several forms | |||||
| Long products ≤160 mm and flat products ≤20 mm (EN 10302, 2.4665) | +AT (solution annealed) | ≥ 690 | ≥ 270 | ≥ 30 | Flat products under 3 mm: A five points lower. |
Creep behaviour
Guidance values (MPa) — Mean values of a scatter band. They are neither an acceptance requirement nor a design allowable stress. Figures in parentheses are long-term extrapolations and less reliable than the tested range.
| Temp °C | Creep strength Rp1.0 (1% plastic strain) | Rupture strength Ru | ||
|---|---|---|---|---|
| 10 000 h | 100 000 h | 10 000 h | 100 000 h | |
| 550 | — | — | 360 | 275 |
| 600 | 164 | 117 | 254 | 188 |
| 650 | 109 | 76 | 175 | 126 |
| 700 | 78 | 52 | 119 | 82 |
| 750 | 51 | 34 | 79 | 52 |
| 800 | 33 | 20 | 51 | 32 |
| 850 | 20 | 11 | 32 | 19 |
| 900 | 11 | 5.4 | 19.5 | 10.6 |
| 950 | 5.5 | 2 | 11.2 | 5.5 |
| 1000 | 1.9 | — | 6 | 2.5 |
Thermal expansion and elastic modulus
| Temperature range | Mean coefficient ×10⁻⁶/K |
|---|---|
| 20–200 °C | 14.2 |
| 20–300 °C | 14.2 |
| 20–400 °C | 14.2 |
| 20–600 °C | 14.6 |
| 20–800 °C | 15.5 |
| 20–1000 °C | 16.7 |
Elastic modulus vs temperature
| Temp °C | E GPa |
|---|---|
| 20 | 199 |
| 100 | 196 |
| 200 | 190 |
| 300 | 184 |
| 400 | 178 |
| 500 | 171 |
| 600 | 164 |
| 650 | 161 |
| 700 | 157 |
| 800 | 149 |
| 900 | 141 |
| 1000 | 133 |
Grain size
Required by the standard, conditionally — t ≤3.175 mm: ASTM micrograin size No. 3.0 or finer (mean grain dia. 0.127 mm); t >3.175 mm: No. 1.5 or finer (0.214 mm)
Applies to annealed sheet and strip only, banded by thickness; it does not apply to bar — for bar, grain size is specified only for N12160, so Hastelloy X bar carries no grain-size acceptance requirement.
More detail 2
The direction is the reverse of 800H/800HT: here the limit is "No. 3.0 or finer", a floor on the fine side (thin sheet needs fine grain to form), whereas N08810 requires "No. 5 or coarser", a ceiling on the fine side (creep needs coarse grain).
Whenever you see "ASTM grain size number N", check first whether it reads "or finer" or "or coarser".
Where this grade is recommended
Matched in 3 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Exhaust & afterburner | Aerospace | 700 – 950 °C | 3 / 8 | 89 |
| Gas-turbine hot section | Power & Nuclear | 800 – 950 °C | 5 / 10 | 86 |
| Engine hot section | Aerospace | 650 – 900 °C | 9 / 9 | 85 |
Designations & equivalents
| UNS | N06002 / W86002 (weld) |
| W.Nr. (Germany) | 2.4665 |
| EN designation | NiCr22Fe18Mo |
| Trade name(s) | Hastelloy X / Nicrofer 6020 hMo |
| ASTM / AISI | B366 / B435 / B572 / B619 / B622 / B626 |
| AMS (SAE aerospace) | 5390 / 5536 / 5754 / 5798 |
| AWS (welding) | A5.14 ERNiCrMo-2 |
| NACE sour service | ISO 15156-3: annealed, no limit on H₂S or temperature; cold-worked ≤40 HRC |
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
11 specifications. Name the standard and its edition on the order.
Guaranteed values and required tests differ between specifications — see Mechanical minima by form for the figures per form.
Frequently asked questions
What is Alloy X · UNS N06002?
Alloy X · UNS N06002 — Ni superalloys. Classic gas-turbine combustor alloy — 900 °C-class oxidation resistance
What is the maximum service temperature of N06002?
Typically about 900 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of N06002?
The specified minimum tensile strength is 655 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.
Which standards cover N06002?
ASTM B366, ASTM B435, ASTM B572, ASTM B619, ASTM B622, ASTM B626, AMS 5390, AMS 5536, AMS 5754, AMS 5798, EN 10302 (creep-resisting steels, nickel and cobalt alloys)
Where is N06002 typically used?
Exhaust & afterburner (Aerospace); Gas-turbine hot section (Power & Nuclear); Engine hot section (Aerospace)
In which forms is N06002 available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
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