Easy Processing Inconel 718 Strip / Plate / Sheet Customized Size For Steam Turbine
Easy Processing Inconel 718 Strip / Plate / Sheet Customized Size For Steam Turbine
Introduction
Inconel 718 is a Nickel-Chromium alloy being precipitation hardenable and having high creep-rupture strength at high temperatures to about 700°C (1290°F). It has higher strength thanInconel X-750 and better mechanical properties at lower temperatures than Nimonic 90 andInconel X-750.
Chemical Composition of Inconel 718
The compositional range for Inconel 718 is provided in the table below.
| Fe | BAL |
| Nb+Ta | 4.75 - 5.5 % |
| Mo | 2.8 - 3.3 % |
| Ti | 0.65 - 1.15 % |
| Al | 0.2 - 0.8 % |
Typical Properties of Inconel 718
Typical properties of Inconel 718 are covered in the following table.
| Property | Metric | Imperial |
| Density | 8.19 g/cm3 | 0.296 lb/in3 |
| Melting point | 1336 °C | 2437 °F |
| Co-Efficient of Expansion | 13.0 µm/m.°C (20-100 °C) |
7.2x10-6 in/in.°F (70-212 °F) |
| Modulus of rigidity | 77.2 kN/mm2 | 11197 ksi |
| Modulus of elasticity | 204.9 kN/mm2 | 29719 ksi |
Properties of Supplied Materials and Heat Treated Materials
| Condition of Supply | Heat Treatment (After Forming) | |||
| No.1 Spring Temper/Spring Temper |
1. Solution Anneal at 980°C (1800°F) for 1 hour and air cool and 2. Age harden at 720°C (1330°F) for 8 hours and furnace cool to 620°C (1150°F) and hold at 620°C (1150°F) for a total age hardening time of 18 hours and air cool. |
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| No.1 Spring Temper/Spring Temper (NACE MRO175) |
1. 1010°C (1870°F) 2 hours and air cool and 2. 790°C (1455°F) 6 hours and air cool. |
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| Condition | Approx Tensile Strength | Approx Service Temp. | ||
| Annealed | 800 - 1000 N/mm2 | 116 - 145 ksi | – | - |
| No.1 Spring Temper | 1000 - 1200 N/mm2 | 145 - 175 ksi | – | - |
| No.1 Spring Temper + Annealed + Aged | 1250 - 1450 N/mm2 | 181 - 210 ksi | -200 to +550°C | -330 to +1020°F |
| Spring Temper | 1300 - 1500 N/mm2 | 189 - 218 ksi | – | - |
| Spring Temper + Annealed + Aged | 1250 - 1450 N/mm2 | 181 - 210 ksi | -200 to +550°C | -330 to +1020°F |
| Element | Content |
| Ni+Co | 50 - 55 % |
| Cr | 17 - 21 % |
Typical application areas
1. Marine: Marine structures in sea areas, seawater desalination, marine aquaculture, and seawater heat exchange.
2. Environmental protection: Flue gas desulfurization equipment for thermal power generation, wastewater treatment, etc.
3. Energy: Atomic power generation, comprehensive utilization of coal, and tidal power generation.
4, petrochemical industry: oil refining, chemical and chemical equipment.
5, the food industry: salt, soy sauce brewing.
6, high concentration of chloride ion environment: paper industry, various bleaching devices
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