GH4169 Nickel-based alloy bar Inconel718 High temperature alloy round steel Fast delivery and guaranteed material.

‌Inconel718 has a density range of 8.19 to 8.24 g/cm3‌. This alloy has a high density, which makes it perform well in high-strength applications. Inconel718 is a high-performance nickel-based high-temperature alloy that is widely used in aerospace, energy, and chemical industries, and is favored for its excellent high-temperature strength, corrosion resistance, and ease of processing. ‌

The main components of Inconel718 include nickel, chromium, iron, molybdenum, niobium and other elements, of which the nickel content is usually above 50%, providing good high-temperature strength and corrosion resistance; the chromium content is between 17% and 21%, which enhances the corrosion resistance and oxidation resistance of the alloy; the content of molybdenum and niobium helps to improve the high-temperature strength and creep resistance of the alloy. In addition, Inconel718 performs well in mechanical properties, with a tensile strength usually above 1250MPa, a yield strength above 1100MPa, and an elongation above 20%.

Inconel718 has a melting point of approximately 1260°C to 1336°C, and is able to maintain its structural integrity in extreme temperature environments. Its thermal conductivity is low, approximately 11.4W/m·K, which makes it less efficient at conducting heat at high temperatures, helping to reduce thermal stress. The thermal expansion coefficient at high temperatures is approximately 13.0µm/m·K, making it suitable for parts that require high precision and high strength.

Chemical composition

The main chemical components of Inconel718 alloy include nickel (Ni), chromium (Cr), iron (Fe), molybdenum (Mo), niobium (Nb), etc., as well as trace elements such as titanium (Ti), aluminum (Al), cobalt (Co), manganese (Mn), silicon (Si), copper (Cu), carbon (C), phosphorus (P), sulfur (S) and boron (B). Among them, the content of nickel is usually above 50%, which is the main component of the alloy and provides good high-temperature strength and corrosion resistance; the content of chromium is in the range of 17% to 21%, which enhances the corrosion resistance and oxidation resistance of the alloy; the contents of molybdenum and niobium are in a certain range, which helps to improve the high-temperature strength and creep resistance of the alloy, and further improve the strength of the alloy through precipitation hardening.

Physical and mechanical properties

Nickel (Ni): 50-55%

Chromium (Cr): 17-21%

Iron (Fe): Balance

Molybdenum (Mo): 2.8-3.3%

Niobium (Nb): 4.75-5.5%

Titanium (Ti): 0.65-1.15%

Aluminum (Al): 0.2-0.8%

Inconel718 alloy has excellent physical properties and good thermal stability. In terms of mechanical properties, after proper heat treatment, the tensile strength of the alloy is usually above 1250MPa, and some data mention that it can reach 1375~1450MPa; the yield strength is above 1100MPa, and some data mention that it can reach 1100~1200MPa; the elongation is above 20%, and some data mention that it is 12~15%; the hardness (HRC) is usually between 40~45. These mechanical properties enable Inconel718 alloy to withstand complex mechanical stresses and working conditions.

Features

Easy processing: Whether in the annealed state or the aged state, Inconel718 alloy can be subjected to various forms of welding and machining to meet the manufacturing needs of complex components.

High temperature strength: It can maintain good strength and toughness at temperatures up to about 700°C.

Low temperature stability: Even at extremely low temperatures, Inconel718 can maintain its excellent physical and mechanical properties.

Corrosion resistance: It has good tolerance to a variety of corrosive environments, including oxidizing, reducing and salt spray environments.

Long-term tissue stability: It can maintain good tissue stability during long-term use and is not prone to phase change or decomposition.