Description
Overview of IN718
IN718 powder, a nickel-rich superalloy material, is commonly employed in additive manufacturing technologies like powder bed fusion and direct energy deposition. Primarily consisting of nickel as its base metal, it incorporates strategic additions of chromium, iron, niobium, molybdenum, and trace elements. This optimized element matrix endows the fabricated components with superior mechanical resilience, enhanced corrosion tolerance, and reliable performance under elevated temperature conditions, making it suitable for demanding engineering applications.
Powder Chemical Composition(wt,-%)
| Element | C | Cr | Ni | Co | Nb | Mo |
| wt% | 0.02-0.06 | 17.00-
21.00 |
50.00-
55.00 |
≤1.00 | 4.75-5.50 | 2.80-3.30 |
| Element | Al | Ti | Fe | B | Mg | Mn |
| wt% | 0.20-0.80 | 0.65-1.15 | Bal | ≤0.006 | ≤0.010 | ≤0.35 |
| Element | Si | P | S | Cu | O | N |
| wt% | ≤0.35 | ≤0.015 | ≤0.015 | ≤0.30 | ≤0.020 | ≤0.015 |
Physical Properties
| Size | Particle size distribution | Hall flow rate | Bulk density | Tap density | ||
| D10(μm) | D50(μm) | D90(μm) | ||||
| 15-53μm | ≥15 | 30-40 | ≤60 | ≤25s/50g | ≥4.30g/cm³ | ≥4.80g/cm³ |
Mechanical Properties
| 815℃ Endurance performance | ||
| Tensile strength
(Ob/Mpa) |
duration
(t/h) |
Elongation at break(δ5/%) |
| ≥690 | ≥80 | ≥5 |
| Measuring temperature | Tensile strength4
(Ob/Mpa) |
Yield strength
(Opo.2/Mpa) |
Elongation at break
(δ5/%) |
| 25℃ | ≥1270 | ≥1030 | ≥12 |
| 650℃ | ≥1000 | ≥860 | ≥12 |
Heat Treatment Recommendation
Option 1: Solution Heat Treatment: 620℃±10℃/8H/AC
Option 2: Heat isostatic pressing: 980-1060℃/1h/AC+720℃±10℃/8H/FC
Primary Applications
| Industry | Components |
| Aerospace | Engine components like turbine blades, discs |
| Power generation | Combustion cans, transition ducts |
| Oil and gas | Downhole tools, valves, pumps |
| Automotive | Turbocharger wheels, exhaust valves |
| Medical | Orthopedic implants, surgical tools |
