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Compare chemical composition, mechanical properties, and international standard equivalents side by side. Differences highlighted in gold.
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Nickel-Chromium Precipitation Hardening Alloy
Alloy 718
UNS: N07718 | Werkstoff: 2.4668
ASTM: N07718
Nickel-Iron-Chromium-Molybdenum Alloy
Alloy 825
UNS: N08825 | Werkstoff: 2.4858
ASTM: N08825
13 differences found
9 in chemical composition, 4 in mechanical properties. Differences highlighted in gold.
Chemical Composition (% max unless range)
| Element | Alloy 718 | Alloy 825 | Match |
|---|---|---|---|
| C | 0.08 max | 0.05 max | |
| Mn | 0.35 max | 1.00 max | |
| Si | 0.35 max | 0.50 max | |
| Cr | 17.0-21.0 | 19.5-23.5 | |
| Ni | 50.0-55.0 | 38.0-46.0 | |
| Mo | 2.80-3.30 | 2.5-3.5 | |
| Cu | - | 1.5-3.0 | |
| Ti | 0.65-1.15 | 0.6-1.2 | |
| Fe | Remainder | 22.0 min |
Mechanical Properties
| Property | Alloy 718 | Alloy 825 | Match |
|---|---|---|---|
| Tensile Strength | 1241 MPa min (age hardened) | 586 MPa min | |
| Yield Strength | 1034 MPa min (age hardened) | 241 MPa min | |
| Elongation | 12% min | 30% min | |
| Hardness | 36 HRC max (solution annealed) | N/A |
International Standard Equivalents
| Standard | Alloy 718 | Alloy 825 |
|---|---|---|
| UNS Number | N07718 | N08825 |
| Werkstoff Nr. | 2.4668 | 2.4858 |
| EN Name | NiCr19NbMo | NiCr21Mo |
| ASTM / ASME | N07718 | N08825 |
| Applicable Standards | ASTM B637 / ASME SB637, ASTM B670, AMS 5662 / AMS 5663, API 6A718, DIN 17751 | ASTM B423 / ASME SB423, ASTM B163 / ASME SB163, ASTM B705 / ASME SB705, DIN 17751 |
