EOS NickelAlloy 247
Material Data Sheet
EOS NickelAlloy 247
EOS NickelAlloy 247 is a high gamma prime fraction Ni-base superalloy with a combination of strength and oxidation resistance at elevated temperature.
EOS NickelAlloy 247 requires advanced processing and post-processing/heat treatment strategies for successful component fabrication, which are offered in combination with EOS consulting and application development by AdditiveMinds.
High strength at elevated temperatures
Creep resistance
Oxidation and hot corrosion resistance
Gas turbine hot gas path components; nozzle guide vanes, blades, ring segments
Integrally bladed disks (blisks) turbopump rotors
Engineering components for sustained service at elevated temperatures
The EOS Quality Triangle
EOS incorporates these TRLs into the following two categories:
- Premium products (TRL 7-9): offer highly validated data, proven capability and reproducible part properties.
- Core products (TRL 3 and 5): enable early customer access to newest technology still under development and are therefore less mature with less data.
All of the data stated in this material data sheet is produced according to EOS Quality Management System and international standards
POWDER PROPERTIES
EOS NickelAlloy 247 powder composition matches the composition of cast versions of the same superalloy. The powder is manufactured by vacuum inert gas atomization and gas atomization. Impurities and tramp elements are strictly controlled.
Powder Chemical Composition (wt.-%)
| Element | Min. | Max. |
|---|---|---|
| Ni | Balance | |
| W | 9 | 10 |
| Co | 8.8 | 9.6 |
| Cr | 7.7 | 8.5 |
| Al | 5.4 | 5.8 |
| Ta | 3 | 3.4 |
| Hf | 1.2 | 1.6 |
| Mo | 0.4 | 0.6 |
| C | 0.07 | 0.09 |
| B | 0.01 | 0.02 |
| Zr | 0.005 | 0.015 |
| Fe | - | 0.15 |
| Si | - | 0.15 |
| Mn | - | 0.01 |
| Nb | - | 0.1 |
| V | - | 0.1 |
| Cu | - | 0.01 |
| Mg | - | 0.006 |
Powder Particle Size
| GENERIC PARTICLE SIZE DISTRIBUTION | 20 - 53 μm | |
|---|---|---|
HEAT TREATMENT
EOS NickelAlloy 247 requires careful selection of heat treatment, which can beoptimized for the specific component to be manufactured and its functional requirements.
Heat treatment typically includes a stress relief and solution treatment (this may be done within a HIP) followed by an ageing heat treatment.
Shot peening is recommended prior to heat treatment.
EOS NickelAlloy 247 I General data
- - TRL 3
Process Information Metal
The mechanical properties of EOS NickelAlloy 247 may vary depending on the specific processing parameters and heat treatment used for the component manufacturing. The following data represents tensile properties typically achieveable from EOS NickelAlloy 247.
Microstructure of the Produced Parts
Mechanical Properties
Mechanical Properties HIP + Heat-treated
| EN ISO 6892-1 Room Temperature | Yield Strength [MPa] | Tensile Strength [MPa] | Elongation at Break A [%] | Reduction of Area Z [%] | Number of Samples | |
|---|---|---|---|---|---|---|
| Vertical | 920 | 1200 | 12 | 14 | - | - |
| Horizontal | 940 | 1250 | 7 | 9 | - | - |
Mechanical Properties Heat Treated
| EN ISO 6892-1 870°C | Yield Strength [MPa] | Tensile Strength [MPa] | Elongation at Break A [%] | Reduction of Area Z [%] | Number of Samples | |
|---|---|---|---|---|---|---|
| Vertical | 700 | 900 | 10 | 10 | - | - |
| Horizontal | 750 | 920 | 2 | 4 | - | - |
Stress Rupture Performance
| ASTM E139 | Stress [MPa] | Temperature [°C] | Time to Rupture [hrs] | Elongation [%] | RA [%] |
|---|---|---|---|---|---|
| Vertical | 380 | 870 | 158 | 14 | 14.5 |
| Horizontal | 380 | 870 | 17 | 0.85 | 4.1 |
The creep resistance of EOS NickelAlloy 247 may vary depending on the specific processing parameters and heat treatment used for the component manufacturing. The following data represents stress rupture test results typically achieveable from EOS NickelAlloy 247.
Stress rupture performance
The creep resistance of EOS NickelAlloy 247 may vary depending on the specific processing parameters and heat treatment used for the component manufacturing. The shown data represents stress rupture test results typically achieveable from EOS NickelAlloy 247.