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Material Data Sheet
| material no.: | 2.4668 |
| UNS no.: | N07718 |
| designation: | Alloy 718 |
| ASTM B637 | DIN EN 10302 | API 6A718 | |
|---|---|---|---|
| C | max. 0,08 | 0,020 - 0,08 | max. 0,045 |
| Mn, max. | 0,35 | 0,35 | 0,35 |
| Si, max. | 0,35 | 0,35 | 0,35 |
| P, max. | 0,015 | 0,015 | 0,010 |
| S, max. | 0,015 | 0,015 | 0,010 |
| Cr | 17,0 - 21,0 | 17,0 - 21,0 | 17,0 - 21,0 |
| Co, max. | 1,0 | 1,00 | 1,00 |
| Mo | 2,80 - 3,30 | 2,80 - 3,3 | 2,80 - 3,30 |
| Nb + Ta | 4,75 - 5,50 | 4,7 - 5,5 | 4,87 - 5,20 |
| Ti | 0,65 - 1,15 | 0,60 - 1,20 | 0,80 - 1,15 |
| Al | 0,20 - 0,80 | 0,30 - 0,70 | 0,40 - 0,60 |
| B | max. 0,006 | 0,002 - 0,006 | max. 0,006 |
| Fe | Bal. | Bal. | Bal. |
| Cu, max. | 0,30 | 0,30 | 0,23 |
| Ni | 50,0 - 55,0 | 50,0 - 55,0 | 50,0 - 55,0 |
| Pb, max. | 0,0010 | ||
| Se, max. | 0,0005 | ||
| Bi, max. | 0,00005 | ||
| Ca, max. | *0,0030 | ||
| Mg, max. | *0,0060 | ||
*to be determined if intentionally added | |||
| solution annealed + precipitation hardened |
bar / forging | bar / forging D ≤ 160 mm |
bar / forging D < 76 mm / 76 mm ≤ D ≤ 254 mm / D > 254 mm |
|---|---|---|---|
| Rm (MPa) | ≥ 1275 | ≥ 1230 | ≥ 1034 |
| Rp 0,2 (MPa) | ≥ 1034 | ≥ 1030 | 827 - 1000 |
| A (%) | ≥ 12 | ≥ 12 | ≥ 20 |
| Z (%) | ≥ 15 | ≥ 35 / ≥ 35 / ≥ 25 | |
| Av (J) at -60 °C | l ≥ 68 (61)* / q ≥ 47 (41)* / q ≥ 41 (37)* | ||
| lateral expansion (mm) | ≥ 0,38 | ||
| hardness (HB) | ≥ 331 | 32 - 40 HRC | |
*individual value | |||