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 elements8 elements | |||
| Ni | Nickel | Bal. | |
| Cr | Chromium | 18.5 – 20.5% | |
| Co | Cobalt | 9 – 11% | |
| Mo | Molybdenum | 8 – 9% | |
| Ti | Titanium | 1.9 – 2.3% | |
| Al | Aluminium | 1.38 – 1.65% | |
| C | Carbon | 0.04 – 0.08% | |
| B | Boron | 0.003 – 0.01% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual10 elements | |||
| Fe | Iron | ≤ 1.5% | |
| W | Tungsten | ≤ 0.5% | |
| Nb | Niobium | ≤ 0.2% | |
| Ta | Tantalum | ≤ 0.1% | |
| Mn | Manganese | ≤ 0.3% | |
| Si | Silicon | ≤ 0.15% | |
| P | Phosphorus | ≤ 0.015% | |
| S | Sulphur | ≤ 0.015% | |
| Cu | Copper | ≤ 0.1% | |
| Zr | Zirconium | ≤ 0.02% | |
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 forgings (≤152 mm) | Supplied solution treated at 2000–2100 °F [1093–1149 °C]; specimens double aged at 1010 ± 8 °C for 2 h, air cooled, then 788 ± 8 °C for at least 8 h, air cooled | ≥ 1027 (149 ksi) | ≥ 593 (86 ksi) | ≥ 20 | Also specified: Hardness ≥ 24 HRC |
| Bar, forgings and forging stock (Type 1) | Solution treated at 2000–2125 °F [1093–1163 °C], then 1850 °F [1010 °C] for 2 h, air cooled, then 1450 °F [788 °C] for 8 h, air cooled | ≥ 1034 (150 ksi) | ≥ 620 (90 ksi) | ≥ 20 | Also specified: Reduction of area Z ≥ 14 % · Hardness ≥ 250 HBW |
| Bar, forgings and forging stock (Type 2) | Solution treated at 2000–2125 °F [1093–1163 °C], then 1450–1550 °F [790–840 °C] for at least 4 h, air cooled | ≥ 1070 (155 ksi) | ≥ 620 (90 ksi) | ≥ 20 | Also specified: Reduction of area Z ≥ 14 % · Hardness ≥ 250 HBW |
| Plate, sheet and strip | |||||
| Plate, sheet and strip (0.51-25.4 mm) | Supplied solution treated; specimens double aged at 1010 ± 8 °C for 2 h, air cooled, then 788 ± 8 °C for at least 8 h, air cooled | ≥ 1034 (150 ksi) | ≥ 586 (85 ksi) | ≥ 20 | Also specified: Hardness ≥ 24 HRC |
| Plate (>25.4-57.2 mm) | Supplied solution treated; specimens double aged at 1010 ± 8 °C for 2 h, air cooled, then 788 ± 8 °C for at least 8 h, air cooled | ≥ 1069 (155 ksi) | ≥ 620 (90 ksi) | ≥ 20 | Also specified: Hardness ≥ 24 HRC |
Hardness requirement
Required by the standard — ≥ 250 HB (24 HRC min)
Type 1 and Type 2 share the same hardness minimum; the tensile minimum differs — 1034 MPa for Type 1, 1070 MPa for Type 2.
Stress-rupture requirement
| Heat treatment | Solution + precipitation hardened |
| Test temperature | 1700 °F (927 °C) |
| Test stress | 13 000 psi (89 MPa) |
| Minimum life | ≥ 50 h |
| Elongation | ≥ 10 % |
This is a pass/fail acceptance test, not a design creep curve.
Where this grade is recommended
Matched in 4 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Turbine discs & blades | Aerospace | 600 – 800 °C | 1 / 8 | 93 |
| Engine hot section | Aerospace | 650 – 900 °C | 1 / 9 | 92 |
| HT boiler & superheater | Power & Nuclear | 450 – 600 °C | 3 / 6 | 89 |
| Gas-turbine hot section | Power & Nuclear | 800 – 950 °C | 2 / 10 | 88 |
Designations & equivalents
| Trade name(s) | Haynes 282 |
| ASTM / AISI | B637 |
| AMS (SAE aerospace) | 5915 / 5951 |
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
4 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 282 · UNS N07208?
Alloy 282 · UNS N07208 — Ni superalloys. Latest-generation age-hardened alloy — turbine rings and hot sections
What is the maximum service temperature of N07208?
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 N07208?
The specified minimum tensile strength is 1034 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 N07208?
AMS 5951B, AMS 5915B, ASTM B637, AWS A5.14/A5.14M
Where is N07208 typically used?
Turbine discs & blades (Aerospace); Engine hot section (Aerospace); HT boiler & superheater (Power & Nuclear); Gas-turbine hot section (Power & Nuclear)
In which forms is N07208 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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