Nickel and nickel alloys · Alloy 718 CTP / Nicrofer 5219 Nb / UNS N07718 / 2.4668
Nickel alloy Alloy 718 CTP (UNS N07718 / 2.4668)
Technical characteristics of Alloy 718 CTP alloy
| Rolled product | Parameter | Value |
|---|---|---|
| Analogs | Sheet, strip, wire, bar, plates | NC19FeNb |
| Analogs | Sheet, strip, wire, bar, plates | NiCr19Fe19Nb5Mo3 - 2.4668 |
| Analogs | Sheet, strip, wire, bar, plates | NA 51 |
| Main specifications | Sheet, strip, wire, bar, plates | B 670 |
| Alloy name | Sheet, strip, wire, bar, plates | Alloy 718 CTP, Nicrofer 5219 Nb, VDM Alloy 718 CTP, UNS N07718 |
| Alloy name | Sheet, strip, wire, bar, plates | Alloy 718 CTP, Nicrofer 5219 Nb, VDM Alloy 718 CTP, UNS N07718 |
| Analogs | Sheet, strip, wire, bar, plates | 6208 |
| Analogs | Sheet, strip, wire, bar, plates | 10302 |
| Analogs | Sheet, strip, wire, bar, plates | 17744, 17750, 17753 |
| Analogs | Sheet, strip, wire, bar, plates | AFNOR |
| Analogs | Sheet, strip, wire, bar, plates | BS |
| Analogs | Sheet, strip, wire, bar, plates | DIN |
| Analogs | Sheet, strip, wire, bar, plates | DIN EN |
| Analogs | Sheet, strip, wire, bar, plates | EN |
| Analogs | Sheet, strip, wire, bar, plates | ISO |
| Main specifications | Sheet, strip, wire, bar, plates | ASTM |
Alloy 718 CTP is a dispersion-hardening nickel-chromium-iron-molybdenum superalloy designed for operation in extreme conditions. High strength indicators are achieved due to the carefully balanced introduction of alloying elements: niobium, titanium, and aluminum. Products from EV Group China are supplied in the solution-annealed condition or with subsequent high-temperature quenching, which ensures optimal mechanical properties. The standard 120K execution has a yield strength of 120 ksi, while the 150K version guarantees an increased yield strength of up to 150 ksi, meeting the most stringent load requirements. The rolled product surface is available in both oxidized and ground form, allowing for the selection of the optimal option for specific production tasks.
Chemical composition of Alloy 718 CTP (%)
| Ni | Parameter | Value |
|---|---|---|
| 50,0-55,0 | Al | 0,40-0,60 |
| 50,0-55,0 | B | <0,0060 |
| 50,0-55,0 | Bi | <0,00005 |
| 50,0-55,0 | C | <0,045 |
| 50,0-55,0 | Co | <1,00 |
| 50,0-55,0 | Cr | 17,0-21,0 |
| 50,0-55,0 | Cu | <0,5 |
| 50,0-55,0 | Fe | Rem. |
| 50,0-55,0 | Mn | <0,35 |
| 50,0-55,0 | Mo | 2,80-3,30 |
| 50,0-55,0 | Nb+Ta | 4,87-5,20 |
| 50,0-55,0 | P | <0,010 |
| 50,0-55,0 | Pb | <0,0010 |
| 50,0-55,0 | S | <0,010 |
| 50,0-55,0 | Se | <0,0005 |
| 50,0-55,0 | Si | <0,23 |
| 50,0-55,0 | Ti | 0,80-1,15 |
Mechanical properties of Alloy 718 CTP
The given values of mechanical characteristics are relevant for hot-rolled or cold-drawn material in the annealed condition. For non-standard sizes, it is highly recommended to consult with EV Group China engineers to ensure compliance with the required operational parameters.
| Designation | Parameter | Value |
|---|---|---|
| Yield Strength (Rp0.2) | 120K | 1049 |
| Yield Strength (Rp0.2) | 120K | 1138 |
| Yield Strength (Rp0.2) | 120K | 130,7 |
| Yield Strength (Rp0.2) | 120K | 132,4 |
| Yield Strength (Rp0.2) | 120K | 135 |
| Yield Strength (Rp0.2) | 120K | 139,5 |
| Yield Strength (Rp0.2) | 120K | 152,1 |
| Yield Strength (Rp0.2) | 120K | 165,1 |
| Yield Strength (Rp0.2) | 120K | 901 |
| Yield Strength (Rp0.2) | 120K | 913 |
| Yield Strength (Rp0.2) | 120K | 931 |
| Yield Strength (Rp0.2) | 120K | 962 |
| Yield Strength (Rp0.2) | 150K | 1039 |
| Yield Strength (Rp0.2) | 150K | 1040 |
| Yield Strength (Rp0.2) | 150K | 150,6 |
| Yield Strength (Rp0.2) | 150K | 150,9 |
| Yield Strength (Rp0.2) | Designation | ksi |
| Yield Strength (Rp0.2) | Designation | MPa |
| Tensile Strength (Rm) | 120K | 1196 |
| Tensile Strength (Rm) | 120K | 1211 |
| Tensile Strength (Rm) | 120K | 1231 |
| Tensile Strength (Rm) | 120K | 1256 |
| Tensile Strength (Rm) | 120K | 1400 |
| Tensile Strength (Rm) | 120K | 1606 |
| Tensile Strength (Rm) | 120K | 173,5 |
| Tensile Strength (Rm) | 120K | 175,6 |
| Tensile Strength (Rm) | 120K | 178,5 |
| Tensile Strength (Rm) | 120K | 182,2 |
| Tensile Strength (Rm) | 120K | 203,1 |
| Tensile Strength (Rm) | 120K | 233,9 |
| Reduction of Area | 120K | 34 |
| Reduction of Area | 120K | 38 |
| Reduction of Area | 120K | 38 |
| Reduction of Area | 120K | 42 |
| Reduction of Area | 120K | 43 |
| Reduction of Area | 120K | 45 |
| Temperature | 120K | -100 |
| Temperature | 120K | -148 |
| Temperature | 120K | -196 |
| Temperature | 120K | -320,8 |
| Temperature | 120K | 100 |
| Temperature | 120K | 150 |
| Temperature | 120K | 20 |
| Temperature | 120K | 200 |
| Temperature | 120K | 212 |
| Temperature | 120K | 302 |
| Temperature | 120K | 392 |
| Temperature | 120K | 68 |
| Elongation | 120K | 23,5 |
| Elongation | 120K | 24 |
| Elongation | 120K | 26 |
| Elongation | 120K | 27 |
| Elongation | 120K | 28 |
| Elongation | 120K | 29 |
| Tensile Strength (Rm) | 150K | 1237 |
| Tensile Strength (Rm) | 150K | 1237 |
| Tensile Strength (Rm) | 150K | 179,4 |
| Tensile Strength (Rm) | 150K | 179,5 |
| Reduction of Area | 150K | 39 |
| Reduction of Area | 150K | 40 |
| Temperature | 150K | 175 |
| Temperature | 150K | 205 |
| Temperature | 150K | 347 |
| Temperature | 150K | 401 |
| Elongation | 150K | 21 |
| Elongation | 150K | 22 |
| Tensile Strength (Rm) | Designation | ksi |
| Tensile Strength (Rm) | Designation | MPa |
| Reduction of Area | Designation | % |
| Temperature | Designation | °F |
| Temperature | Designation | °C |
| Elongation | Designation | % |
Physical and thermal properties
The density of Alloy 718 CTP is 8.26 g/cm³, which is an important parameter for mass calculations and structural design.
| Temperature | Parameter | Value |
|---|---|---|
| °C | Coefficient of expansion | 10^-6/K |
| °C | Coefficient of expansion | 10^-6/°F |
| °C | Modulus of elasticity | 10^6 psi |
| 20 | Coefficient of expansion | - |
| 20 | Coefficient of expansion | - |
| 20 | Modulus of elasticity | 203 |
| 20 | Modulus of elasticity | 29,4 |
| 20 | Temperature | 68 |
| 20 | Specific heat | 0,110 |
| 20 | Specific heat | 460 |
| 20 | Thermal conductivity | 11,1 |
| 20 | Thermal conductivity | 77,0 |
| 20 | Electrical resistivity | 116 |
| °C | Modulus of elasticity | GPa |
| °C | Temperature | °F |
| °C | Specific heat | Btu/lb*°F |
| °C | Specific heat | J/kg*°C |
| °C | Thermal conductivity | Btu*in/sq.ft*h*°F |
| °C | Thermal conductivity | W/m*°C |
| °C | Electrical resistivity | µohm*cm |
Corrosion resistance and welding
The high content of chromium (Cr) and molybdenum (Mo) in Alloy 718 CTP provides excellent resistance to pitting corrosion and stress corrosion cracking, which is critically important for durability in aggressive environments. When performing welding, pulsed argon arc welding (TIG) is recommended to achieve optimal weld quality. It is extremely important to ensure reliable inert gas shielding (argon 4.6) of the weld root to prevent oxidation and defect formation. After welding is complete, it is necessary to thoroughly clean the weld with a stainless steel brush to remove oxides and ensure high corrosion resistance. EV Group China recommends the following consumables: FM 718 (W.nr. 2.4667), AWS A5.14: ERNiFeCr-2.
Advantages of EV Group China Alloy 718 CTP
- High ductility in the annealed condition, facilitating forming and processing.
- Excellent fatigue strength, ensuring reliability under extreme cyclic loads.
- Retention of stable mechanical properties at cryogenic temperatures, expanding the application range.
- High resistance to cracking in H2S and CO2 environments, which is critical for the oil and gas industry.
Application areas
Alloy 718 CTP from EV Group China is actively used in the oil and gas sector, including offshore platforms and well completion equipment. Its exceptional characteristics allow it to operate effectively in aggressive environments with high chloride and hydrogen sulfide content, ensuring the durability and safety of critically important components.