Inconel738 is also known as GH4738, Inconel738Waspaloy(USA),
NC20K14(France)
Inconel738 is that Ni-Cr-Co Precipitate-hardening deformed
superalloy, the use temperature is below 815℃. Cobalt, chromium and
molybdenum are added to the alloy for solution strengthening,
aluminum and titanium are added to form γ’ phase, boron and
zirconium are added to purify and strengthen the grain boundaries.
The alloy has high yield strength and fatigue resistance at
760℃~870℃. It has high oxidation resistance and corrosion
resistance in gas turbine atmosphere below 870℃.
Process Performance and Requirements
Vacuum Induction Furnace(VIM) and Electroslag Remelting
Furnace(ESR)
- Product Chemical Composition
| C | Cr | Ni | Co | Mo | Al | Ti |
| 0.03-0.10 | 18.0-21.0 | Rem | 12.0-15.0 | 3.50-5.00 | 1.20-1.60 | 2.75-3.25 |
| B | Zr | Fe | Mn | Si | P | S |
| ≤ |
| 0.003-0.010 | 0.02-0.08 | 2.0 | 0.10 | 0.15 | 0.015 | 0.015 |
- Product Physical Property
| Density | 8.24g/cm3 |
| Melting Point | 1260-1320℃ |
| Magnetic Energy | Nil |
1080℃±10℃, 4h, air cooling +840℃, 24h, air cooling +760℃, 16h, air
cooling. Can produce bar, forging billet, strip, pipe, wire and etc., Usually delivered without heat treatment, the plates are
delivered after solution treatment
| Cold-drawn Wire | ¢0.3~¢18mm(Delivery in rolls or trays) |
| Hot-Rolling Wire | ¢5.5~¢20mm(Delivery in rolls) |
| Strip | thickness 0.1~4.5*width 6~350mm(Supply in rolls or straight strips) |
| Smooth Forged Rod on a Lathe | ¢60~350mm,L800-2500mm
|
| Hot-rolled Burnishing | ¢20~80mm,L1000-5000mm |
| Cold Drawn and Burnishing | ¢2.5~18mm,L1000-8000mm |
| Seamless Tube | ¢1~275mm,wall thickness 0.2~30,L1000-8000mm |
