Inconel 718
Type Inconel 718 alloy is one of the widely used nickel-based superalloy grades. With its unique composition of nickel, chromium, and niobium, it provides excellent high-temperature strength, corrosion resistance, and outstanding creep and fatigue properties after heat treatment. Grade Inconel 718 is commonly applied in aerospace, power generation, and chemical processing industries, especially in components exposed to high stress and elevated temperatures.
| USA | JP | DE | EUR | CN |
|---|---|---|---|---|
| ASTM | JIS | DIN | EN | GB |
| B637 | - | X8CrNi25-21 | NiCr19Fe19Nb5Mo3 | GH4169 |
Chemical Composition
The typical chemical composition is shown in the table below.
Certification
| Grade | Standard | Inconel 718 Chemical Composition | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | Cr | Ni | S | Mo | Nb | Ti | AI | B | ||
| ≤ % | ≤ % | % | % | % | ≤ % | ≤ % | ≤ % | % | % | % | ||
| N07718 | ASTM B637 | 0.08 | 0.35 | 0.35 | 17.0-21.0 | 50.0-55.0 | 0.015 | 2.80-3.30 | Nb+Ta 4.75-5.50 | 0.65-1.15 | 0.20-0.80 | 0.006 |
| GH4169 | GB/T 14992 | 0.08 | 0.35 | 0.35 | 17.0-21.0 | 50.0-55.0 | 0.015 | 2.80-3.30 | 4.75-5.50 | 0.65-1.15 | 0.20-0.80 | 0.006 |