Allgemein
Property | Temperature | Value |
---|---|---|
Dichte | 23.0 °C | 8.26 g/cm³ Show Supplier Material materials with Dichte of 8.26 g/cm³ |
Mechanisch
Property | Temperature | Value | Comment |
---|---|---|---|
Dehnung | 23.0 °C | 12 % Show Supplier Material materials with Dehnung of 12 % | for 20-800°C |
Elastizitätsmodul | 20.0 °C | 204 GPa Show Supplier Material materials with Elastizitätsmodul of 204 GPa | |
100.0 °C | 199 GPa Show Supplier Material materials with Elastizitätsmodul of 199 GPa | ||
200.0 °C | 193 GPa Show Supplier Material materials with Elastizitätsmodul of 193 GPa | ||
300.0 °C | 187 GPa Show Supplier Material materials with Elastizitätsmodul of 187 GPa | ||
400.0 °C | 180 GPa Show Supplier Material materials with Elastizitätsmodul of 180 GPa | ||
500.0 °C | 173 GPa Show Supplier Material materials with Elastizitätsmodul of 173 GPa | ||
600.0 °C | 166 GPa Show Supplier Material materials with Elastizitätsmodul of 166 GPa | ||
700.0 °C | 158 GPa Show Supplier Material materials with Elastizitätsmodul of 158 GPa | ||
800.0 °C | 150 GPa Show Supplier Material materials with Elastizitätsmodul of 150 GPa | ||
900.0 °C | 143 GPa Show Supplier Material materials with Elastizitätsmodul of 143 GPa | ||
1000.0 °C | 134 GPa Show Supplier Material materials with Elastizitätsmodul of 134 GPa | ||
1100.0 °C | 126 GPa Show Supplier Material materials with Elastizitätsmodul of 126 GPa | ||
1200.0 °C | 122 GPa Show Supplier Material materials with Elastizitätsmodul of 122 GPa | ||
Flächenreduzierung | 23.0 °C | 15 % Show Supplier Material materials with Flächenreduzierung of 15 % | for 20 to 800°C |
Härte, Brinell | 23.0 °C | 277 [-] Show Supplier Material materials with Härte, Brinell of 277 [-] | min., typical mechanical property for rod and bar in the solution annealed condition, >331, rod, bar, solution-annealed and age hardened condition |
Kriechfestigkeit | 550.0 °C | 810 MPa Show Supplier Material materials with Kriechfestigkeit of 810 MPa | Rm/10⁴ h according to DIN EN 10302 of the solution annealed and age hardened condition |
600.0 °C | 620 MPa Show Supplier Material materials with Kriechfestigkeit of 620 MPa | Rm/10⁴ h according to DIN EN 10302 of the solution annealed and age hardened condition | |
650.0 °C | 425 MPa Show Supplier Material materials with Kriechfestigkeit of 425 MPa | Rm/10⁴ h according to DIN EN 10302 of the solution annealed and age hardened condition | |
700.0 °C | 248 MPa Show Supplier Material materials with Kriechfestigkeit of 248 MPa | Rm/10⁴ h according to DIN EN 10302 of the solution annealed and age hardened condition | |
750.0 °C | 125 MPa Show Supplier Material materials with Kriechfestigkeit of 125 MPa | Rm/10⁴ h according to DIN EN 10302 of the solution annealed and age hardened condition | |
800.0 °C | 36 MPa Show Supplier Material materials with Kriechfestigkeit of 36 MPa | Rm/10⁴ h according to DIN EN 10302 of the solution annealed and age hardened condition | |
Streckgrenze Rp 0,2 | 20.0 °C | 1030 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 1030 MPa | Typical mechanical properties |
100.0 °C | 1060 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 1060 MPa | Typical mechanical properties | |
200.0 °C | 1040 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 1040 MPa | Typical mechanical properties | |
300.0 °C | 1020 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 1020 MPa | Typical mechanical properties | |
400.0 °C | 1000 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 1000 MPa | Typical mechanical properties | |
500.0 °C | 980 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 980 MPa | Typical mechanical properties | |
600.0 °C | 950 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 950 MPa | Typical mechanical properties | |
650.0 °C | 860 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 860 MPa | Typical mechanical properties | |
700.0 °C | 870 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 870 MPa | Typical mechanical properties | |
750.0 °C | 760 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 760 MPa | Typical mechanical properties | |
800.0 °C | 640 MPa Show Supplier Material materials with Streckgrenze Rp 0,2 of 640 MPa | Typical mechanical properties | |
Zugfestigkeit | 20.0 °C | 1280 MPa Show Supplier Material materials with Zugfestigkeit of 1280 MPa | Typical mechanical properties |
100.0 °C | 1280 MPa Show Supplier Material materials with Zugfestigkeit of 1280 MPa | Typical mechanical properties | |
200.0 °C | 1250 MPa Show Supplier Material materials with Zugfestigkeit of 1250 MPa | Typical mechanical properties | |
300.0 °C | 1220 MPa Show Supplier Material materials with Zugfestigkeit of 1220 MPa | Typical mechanical properties | |
400.0 °C | 1180 MPa Show Supplier Material materials with Zugfestigkeit of 1180 MPa | Typical mechanical properties | |
500.0 °C | 1150 MPa Show Supplier Material materials with Zugfestigkeit of 1150 MPa | Typical mechanical properties | |
600.0 °C | 1060 MPa Show Supplier Material materials with Zugfestigkeit of 1060 MPa | Typical mechanical properties | |
650.0 °C | 1000 MPa Show Supplier Material materials with Zugfestigkeit of 1000 MPa | Typical mechanical properties | |
700.0 °C | 1040 MPa Show Supplier Material materials with Zugfestigkeit of 1040 MPa | Typical mechanical properties | |
750.0 °C | 880 MPa Show Supplier Material materials with Zugfestigkeit of 880 MPa | Typical mechanical properties | |
800.0 °C | 780 MPa Show Supplier Material materials with Zugfestigkeit of 780 MPa | Typical mechanical properties | |
Thermisch
Property | Temperature | Value |
---|---|---|
Koeffizient der thermischen Ausdehnung | 20.0 °C | 1.41E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.41E-5 1/K |
100.0 °C | 1.41E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.41E-5 1/K | |
200.0 °C | 1.41E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.41E-5 1/K | |
300.0 °C | 1.42E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.42E-5 1/K | |
400.0 °C | 1.44E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.44E-5 1/K | |
500.0 °C | 1.48E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.48E-5 1/K | |
600.0 °C | 1.53E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.53E-5 1/K | |
700.0 °C | 1.64E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.64E-5 1/K | |
800.0 °C | 1.7E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.7E-5 1/K | |
900.0 °C | 1.74E-5 1/K Show Supplier Material materials with Koeffizient der thermischen Ausdehnung of 1.74E-5 1/K | |
Schmelzpunkt | 1257 - 1342 °C Show Supplier Material materials with Schmelzpunkt of 1257 - 1342 °C | |
Spezifische Wärmekapazität | 20.0 °C | 460 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 460 J/(kg·K) |
100.0 °C | 458 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 458 J/(kg·K) | |
200.0 °C | 468 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 468 J/(kg·K) | |
300.0 °C | 485 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 485 J/(kg·K) | |
400.0 °C | 501 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 501 J/(kg·K) | |
500.0 °C | 514 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 514 J/(kg·K) | |
600.0 °C | 533 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 533 J/(kg·K) | |
700.0 °C | 604 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 604 J/(kg·K) | |
800.0 °C | 615 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 615 J/(kg·K) | |
900.0 °C | 626 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 626 J/(kg·K) | |
1000.0 °C | 637 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 637 J/(kg·K) | |
1100.0 °C | 635 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 635 J/(kg·K) | |
1200.0 °C | 658 J/(kg·K) Show Supplier Material materials with Spezifische Wärmekapazität of 658 J/(kg·K) | |
Wärmeleitfähigkeit | 20.0 °C | 11.5 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 11.5 W/(m·K) |
100.0 °C | 12.1 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 12.1 W/(m·K) | |
200.0 °C | 13.5 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 13.5 W/(m·K) | |
300.0 °C | 15.2 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 15.2 W/(m·K) | |
400.0 °C | 17.1 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 17.1 W/(m·K) | |
500.0 °C | 18.8 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 18.8 W/(m·K) | |
600.0 °C | 20.6 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 20.6 W/(m·K) | |
700.0 °C | 24.1 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 24.1 W/(m·K) | |
800.0 °C | 24.2 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 24.2 W/(m·K) | |
900.0 °C | 25 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 25 W/(m·K) | |
1000.0 °C | 25.8 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 25.8 W/(m·K) | |
1100.0 °C | 26.6 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 26.6 W/(m·K) | |
1200.0 °C | 28.7 W/(m·K) Show Supplier Material materials with Wärmeleitfähigkeit of 28.7 W/(m·K) | |
Elektrisch
Property | Temperature | Value |
---|---|---|
spezifischer Widerstand | 20.0 °C | 1.18E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.18E-6 Ω·m |
100.0 °C | 1.2E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.2E-6 Ω·m | |
200.0 °C | 1.23E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.23E-6 Ω·m | |
300.0 °C | 1.25E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.25E-6 Ω·m | |
400.0 °C | 1.27E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.27E-6 Ω·m | |
500.0 °C | 1.28E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.28E-6 Ω·m | |
600.0 °C | 1.3E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.3E-6 Ω·m | |
700.0 °C | 1.31E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.31E-6 Ω·m | |
800.0 °C | 1.32E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.32E-6 Ω·m | |
900.0 °C | 1.33E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.33E-6 Ω·m | |
1000.0 °C | 1.34E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.34E-6 Ω·m | |
1100.0 °C | 1.18E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.18E-6 Ω·m | |
1200.0 °C | 1.2E-6 Ω·m Show Supplier Material materials with spezifischer Widerstand of 1.2E-6 Ω·m | |
Magnetisch
Property | Temperature | Value | Comment |
---|---|---|---|
Curie-Temperatur | -195 °C Show Supplier Material materials with Curie-Temperatur of -195 °C | Typical material property in solution annealed condition, Solution annealed and age hardened: -112 °C | |
Relative magnetische Permeabilität | 23.0 °C | 1 [-] Show Supplier Material materials with Relative magnetische Permeabilität of 1 [-] | max. |
Chemical properties
Property | Value | Comment | |
---|---|---|---|
Aluminium | 0.2 - 0.8 % Show Supplier Material materials with Aluminium of 0.2 - 0.8 % | ||
Bismut | 3E-5 % Show Supplier Material materials with Bismut of 3E-5 % | max. | |
Blei | 5E-4 % Show Supplier Material materials with Blei of 5E-4 % | max. | |
Bor | 6E-3 % Show Supplier Material materials with Bor of 6E-3 % | max. | |
Chrom | 17 - 21 % Show Supplier Material materials with Chrom of 17 - 21 % | ||
Eisen | Balance | ||
Kobalt | 1 % Show Supplier Material materials with Kobalt of 1 % | max. | |
Kohlenstoff | 0.08 % Show Supplier Material materials with Kohlenstoff of 0.08 % | max. | |
Kupfer | 0.3 % Show Supplier Material materials with Kupfer of 0.3 % | max. | |
Mangan | 0.35 % Show Supplier Material materials with Mangan of 0.35 % | max. | |
Molybdän | 2.8 - 3.3 % Show Supplier Material materials with Molybdän of 2.8 - 3.3 % | ||
Nickel | 50 - 55 % Show Supplier Material materials with Nickel of 50 - 55 % | ||
Niobium | 4.75 - 5.5 % Show Supplier Material materials with Niobium of 4.75 - 5.5 % | ||
Phosphor | 0.02 % Show Supplier Material materials with Phosphor of 0.02 % | max. | |
Schwefel | 0.015 % Show Supplier Material materials with Schwefel of 0.015 % | max. | |
Selen | 3E-4 % Show Supplier Material materials with Selen of 3E-4 % | max. | |
Silizium | 0.35 % Show Supplier Material materials with Silizium of 0.35 % | max. | |
Tantal | 0.05 % Show Supplier Material materials with Tantal of 0.05 % | max | |
Titan | 0.65 - 1.15 % Show Supplier Material materials with Titan of 0.65 - 1.15 % |
Technological properties
Property | ||
---|---|---|
Application areas | Based on its high-temperature resistance up to 700 °C, its excellent oxidation and corrosion resistance, and its good workability, VDM® Alloy 718 is used in many demanding applications. Originally, it was developed and used for static and rotating components in aircraft turbines such as housings, mounting elements and turbine disks, where tough requirements apply for creep resistance and fatigue behavior, in particular for the rotating applications. Due to its properties, its good workability and efficiency, the material is additionally widely used for static and rotating components in stationary gas turbines, rocket drives and spacecraft, motor vehicle turbo chargers, high-strength screws, springs and mounting elements, and for heat-resistant tools in forgeries, extruders and separating shearers. The variant VDM® Alloy 718 CTP, which is laid out specifically for the requirements of the oil and gas industry, finds increasing uses in drilling equipment and pump shafts. The components used must ensure an efficient and safe oil and gas extraction with increasing drilling hole depth and pressures and temperatures becoming more critical, and withstand the acid gas environment (H₂S, CO₂, chloride) that is prevalent there (see special data sheet VDM® Alloy 718 CTP). | |
Cold Forming | Cold working should take place in the solution-annealed condition. The material has a higher work hardening rate than austenitic stainless steels. This must be taken into account during design and selection of forming tools and equipment and during the planning of the forming processes. | |
Corrosion properties | Based on the high chrome and molybdenum concentrations, VDM® Alloy 718 has a good resistance in many media against abrasive and local corrosion such as pitting. By virtue of its high nickel content, VDM® Alloy 718 also has good resistance against stress corrosion cracking. | |
General machinability | While VDM® Alloy 718 in the solution annealed condition is easier to process and the strain on tools is less, better surface quality is achieved in the hardened condition. The best results in terms of the surface quality of the finished product are achieved by pre-treatment before hardening and by finishing in the hardened condition. As the alloy is more prone to work-hardening than other low alloyed materials, low cutting speeds and appropriate feed rates should be used and the tool should stay engaged at all times. Sufficient chip depths are important to get below the work-hardened surface layer. | |
Heat Treatment | Through various heat treatments, the mechanical properties of VDM® Alloy 718 can be adjusted specifically. In the solution-annealed condition, the material can be processed and worked more easily. In the solution-annealed and age hardened condition, VDM® Alloy 718 has a high mechanical strength. The solution-annealed condition is obtained through a heat treatment in the temperature range from 940 to 1,065°C (1,724 to 1,949°F). Here, for example, annealing by inserting into a pre-heated furnace at a temperature of 980°C (1,796°F) for 1 hour is common. Cooling can be done by placing the workpiece in water or oil or also in open air. The hardening takes place by annealing in the temperature range from 620 to 790°C (1,148 to 1,454°F). A two-stage heat treatment is common here with insertion in a pre-heated furnace at 720°C (1,328°F) for 8 hours, followed by a furnace cool down to 620°C (1,148°F) and repeated holding for 8 hours. Cooling is usually done in open air. | |
Hot forming | The hot working should generally be conducted after the homogenization with subsequent cooling in air. It should be done evenly in order to receive a homogeneous structure and to prevent the formation of a duplex grain structure. | |
Other | VDM® Alloy 718 has an austenitic structure; multiple phases can be precipitated. By means of different heat treatments, graduated mechanical properties of the material can be reached. The excellent mechanical properties of VDM® Alloy 718 result from the γ’’-formation during the precipitation hardening. | |
Welding | It must be ensured that work is carried out using targeted heat application and low heat input. The interpass temperature should not exceed 100°C (212°F). The stringer bead technique is recommended. In principle, checking of welding parameters is necessary. |