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This specification2 covers rolled nickel-iron-chromiummolybdenum-copper alloy (UNS N08825 and UNS N08221)* plate, sheet, and strip. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
| Element | UNS N08825 | UNS N08221 |
|---|---|---|
| Nickel | 38.0 to 46.0 | 39.0 to 46.0 |
| Chromium | 19.5 to 23.5 | 20.0 to 22.0 |
| Iron | 22.0 minA | balance |
| Manganese | 1.0 max | 1.0 max |
| Carbon | 0.05 max | 0.025 max |
| Copper | 1.5 to 3.0 | 1.5 to 3.0 |
| Silicon | 0.5 max | 0.5 max |
| Sulfur | 0.03 max | 0.03 max |
| Aluminum | 0.2 max | 0.2 max |
| Titanium | 0.6 to 1.2 | 0.6 to 1.0 |
| Molybdenum | 2.5 to 3.5 | 5.0 to 6.5 |
Note :
A. Element shall be determined arithmetically by difference.
| Alloy | Condition | Tensile Strength, min, ksi (MPa) | Yield StrengthA (0.2 % Offset), min, ksi (MPa) | Elongation in 2 in. or 50 mm (or 4 D), min, % |
|---|---|---|---|---|
| Hot-Rolled Plate: | ||||
| UNS N08825 | annealed | 85 (586) | 35 (241) | 30 |
| UNS N08221 | annealed | 79 (544) | 34 (235) | 30 |
| Cold-Rolled Plate: | ||||
| UNS N08825 | annealed | 85 (586) | 35 (241) | 30 |
| UNS N08221 | annealed | 79 (544) | 34 (235) | 30 |
| Hot-Rolled Sheet: | ||||
| UNS N08825 | annealed | 85 (586) | 35 (241) | 30 |
| UNS N08221 | annealed | 79 (544) | 34 (235) | 30 |
| Cold-Rolled Sheet: | ||||
| UNS N08825 | annealed | 85 (586) | 35 (241) | 30 |
| UNS N08221 | annealed | 79 (544) | 34 (235) | 30 |
| Cold-Rolled Strip: | ||||
| UNS N08825 | annealed | 85 (586)B | 35 (241) | 30B |
| UNS N08221 | annealed | 79 (544)B | 34 (235) | 30B |
Note :
A. Yield strength requirements do not apply to material under 0.020 in. (0.51 mm) in thickness.
B. Not applicable for thickness under 0.010 in. (0.25 mm).