1.What is INCONEL 738 material?
Inconel 738 is a precipitation - hardening nickel - based cast superalloy with stable structure. It has excellent high - temperature strength and heat - corrosion resistance below 980℃, and its lasting strength is equivalent to that of Inconel 713C. Due to its high chromium content, its hot - corrosion and oxidation resistance are better than those of 713C alloy. It is a kind of alloy with good comprehensive performance, and is mainly used to manufacture components such as gas turbine blades in aero - engines.
2.What is the composition of INCONEL 783?
Its main components are nickel (52 - 62%), chromium (18 - 22%), molybdenum (8 - 10%), iron (2 - 6%), titanium (1.8 - 2.7%), aluminum (0.3 - 1.2%), carbon (less than 0.08%), silicon (less than 0.5%), manganese (less than 0.5%), and it also contains a small amount of other elements, with the remaining being impurities.
3.What is the tensile strength of INCONEL 738?
There is no fixed - value for the tensile strength of Inconel 738, which is affected by factors such as heat treatment and service temperature. Generally, after standard heat treatment, it can maintain higher tensile strength at high temperatures. But if it is heated at 950℃ for 10,000 hours, its tensile strength will decrease by about 50 kg/mm²
4.What is the difference between INCONEL 718 and 738?
Composition: Inconel 718 is a precipitation - hardening Ni - Cr - Fe alloy, added with niobium and molybdenum. Inconel 738 is mainly composed of nickel, chromium, molybdenum, iron, titanium, aluminum, etc. The content of each element is different from that of Inconel 718, and it also contains a small amount of yttrium to improve corrosion resistance.
Performance: Inconel 718 has excellent corrosion resistance in low - temperature and high - temperature environments, and also has good strength. Inconel 738 has better high - temperature creep rupture strength, and its corrosion resistance is better than that of many high - strength superalloys with low chromium content, and it performs well in high - temperature corrosion environments.
Application: Inconel 718 is widely used in aerospace, nuclear energy and other fields, and is often used to manufacture components that require high - strength and corrosion - resistance. Inconel 738 is mainly used for industrial gas turbine blades, as well as components such as turbine disks, working blades, and high - temperature fasteners in aero - engines.
Manufacturing Process: Inconel 718 is usually processed by hot - rolling, forging and other methods, and can also be processed by precipitation hardening treatment. Inconel 738 is mainly a cast alloy, usually using vacuum melting and vacuum casting, and is generally not welded.
