Materials for Metal 3D Printing
「Nickel Alloy ALLOY IN718」
Features
Inconel is one of the nickel-base alloys. While austenitic stainless steels contain only 8-15% of nickel, or martensitic stainless steels contain only 4-9% of nickel, Inconel contains 40% or more of nickel which is similar to Hastelloy.
As it contains more nickel, it has a great corrosion resistance which does not require corrosion control treatment.
It can also maintain the strength and the oxidation resistance at high temperatures.
There are two types of nickel-base alloys, solid-solution strengthened alloy and γ’precipitation strengthened alloy. Inconel is the latter one which has a great strength at high temperatures, yet vaccum melting is critical due to the active metal elements such as Al or Ti contained. Hot-working, cold-working or welding would work less for the alloys with more γ’ amount.
An important note is that ALLOY IN718 maintains its strength in the environment up to 700℃, while it sharply loses the strength at the temperature over 700℃.
Composition
(in %)
| Elements | Ni | Cr | C | Mn | Si | Cu | Mo | Co | Nb |
|---|---|---|---|---|---|---|---|---|---|
| Regular material (Representative Values) |
50.0～55.0 | 17.0～21.0 | ≦0.08 | ≦0.35 | ≦0.35 | ≦0.30 | 2.80～3.30 | ≦1.00 | 4.75～5.50 |
| Al | Ti | B | P | S | Pb | Se | Bi | Fe | |
| 0.20～0.80 | 0.65～1.15 | ≦0.006 | ≦0.015 | ≦0.015 | 5ppm | 3ppm | 0.3ppm | bal | |
| Elements | Ni | Cr | C | Mn | Si | Cu | Mo | Co | Nb |
| Powder material (Representative Values) |
50.0～55.0 | 17.0～21.0 | ≦0.08 | ≦0.35 | ≦0.35 | ≦0.30 | 2.80～3.30 | ≦1.00 | 4.75～5.50 |
| Al | Ti | B | P | S | Pb | Se | Bi | Fe | |
| 0.20～0.80 | 0.65～1.15 | ≦0.006 | ≦0.015 | ≦0.015 | bal |
Mechanical Properties
| Regular material | After printing | (Reference Values) | Solution heat treatment: 980℃x1hr - air cooling Age hardening: 720℃x8hrs, Up to 620℃ - furnace cooling 620℃x8hrs - air cooling (Reference Values) |
|
|---|---|---|---|---|
| Tensile Strength[MPa] | 1010～1110 | Horizontal direction (XY direction) |
1060±50 | - |
| Vertical direction (Z direction) |
980±50 | 1400±100 | ||
| Yield strength Rp0.2[MPa] | 1034～1176 | Horizontal direction (XY direction) |
780±50 | - |
| Vertical direction (Z direction) |
634±50 | 1150±100 | ||
| Elastic Modulus[GPa] | 205 | Horizontal direction (XY direction) |
160±20 | - |
| Vertical direction (Z direction) |
- | 170±20 | ||
| Elongation[%] | 12～17 | Horizontal direction (XY direction) |
27±5 | - |
| Vertical direction (Z direction) |
31±5 | 15±3 | ||
| Hardness[HV] | 354～382 | Horizontal direction (XY direction) |
302 | 470 |
| Surface Roughness (Ra) [μm] | ーーー | After printing | 5±2(Upskin/Side surfaces) 20±5(Downskin surfaces) |
|
| After blasting | 3±1(Upskin/Side surfaces) 20±5(Downskin surfaces) |
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Applications
Turbine discs, Gas turbines, Rotating /Fixed components of rocket engines, High-tensile bolts, Springs, Parts for nuclear reactors or spacecrafts, Pump shafts, Wellhead equipment, Oil well devices, Well drilling devices
Case Studies
Related Information
- Materials for Metal 3D Printing：Stainless Steel (SUS316L)
- Materials for Metal 3D Printing：Stainless Steel (SUS630)
- Materials for Metal 3D Printing：Hastelloy
- Materials for Metal 3D Printing：Maraging Steel
- Materials for Metal 3D Printing：Titanium (Ti-6Al-4V)
- About Us
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Toray Precision is a pioneer in precision micromachining technology.
Since the founding of Toray Precision Co., Ltd. in 1955, we have been contributing to the synthetic fiber industries worldwide, by making spinnerets which is a key technology for synthetic fiber manufacturing.
Our experiences and technologies obtained through our history in the precision micromachining field are widely used in various industries nowadays, including semiconductor, measurement/inspection, aerospace, and medical instruments.