International standard · ISO
NW7718
ISO 9724:1992 — ISO 9724
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| Al | 0.2 | 0.8 | ||
| B | 0.008 | |||
| C | 0.08 | |||
| Co | 1.5 | counted as nickel | counted as nickel | |
| Cr | 17 | 21 | ||
| Cu | 0.3 | |||
| Fe | Bal | Bal | ||
| Mn | 0.4 | |||
| Mo | 2.8 | 3.3 | ||
| Nb+Ta | 4.7 | 5.5 | ||
| Ni | 50 | 55 | ||
| P | 0.015 | |||
| S | 0.015 | |||
| Si | 0.4 | |||
| Ti | 0.6 | 1.2 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| Wires, drawing stock, Cold drawn, annealed and precipitation treated | 1275 |
Physical properties
| Elastic modulus | Mean thermal expansion | Thermal conductivity | Specific heat | Resistivity | Density | Poisson's ratio |
|---|---|---|---|---|---|---|
| 8.00 |
Similar grades
| Grade | Region | System |
|---|---|---|
| ALTEMP 718 | Global | Enterprise standard |
| Inconel 718 | Global | Enterprise standard |
| NW7718 |  Japan | JIS |
| NiCr19Fe19Nb5Mo3 | Japan | JIS |