Alloy X-750 / Inconel X-750 / UNS N07750 / 2.4669
Inconel X-750 is classified as a structural heat-resistant alloy with a composition of nickel-chromium-niobium with minimal titanium and aluminum additives.
The alloy was created by American authors, and today the patent is owned by the Special Metals Corporation.
The Russian analogue of Inconel X-750 - material §·§¯70§®§£§À (§¿§±828) in accordance with GOST 5632.
Inconel 750 is similar in its qualities and properties to Inconel 600, but due to aluminum and titanium additives, it has increased strength and heat resistance. The material is characterized by a high degree of corrosion resistance at high temperatures, does not oxidize at low temperature conditions, and is resistant to mechanical stress.
According to NACE MR0175 / ISO 15156, this alloy is regulated as a dispersion-hardening material based on nickel. According to this standard, it is recommended for the production of parts and assemblies of various installations, units that are operated in the presence of chlorides, hydrogen sulfide in different concentrations in environments, and at high temperatures.
The alloy is widely used as a wear-resistant, heat-resistant and corrosion-resistant coating, for the production of aircraft engine parts - spring compressor blades, fasteners. It is actively used to create elements and parts of nuclear reactors, gas turbines, and jet engines. It is practically indispensable in the production of containers under pressure, devices for heat treatment.
Nicrofer 7016 TiNb exhibits good general corrosion resistance at high and low temperatures as well as a high level of resistance to stress corrosion cracking. High level of resistance to oxidation up to 980 ¡ã C (1800T).
After precipitation hardening Nicrofer 7016 TiNb can be welded using any conventional method, including DSPE, DSPE, DSPNE, gas shielded welding (SMAW / MMA). Low heat input required.
For DSVE and EAF welding, it is mandatory to use Nicrofer S 7020 electrodes (W.-Nr. 2.4806, SG NiCr20Nb, AWSA5.14 ERNiCrFe-7).
For the last gas-shielded welding it is recommended to use an electrode (W.-Nr. 2.4648, EL NiCr19Nb).
Main features and advantages of the alloy:
High tensile strength at 600 ¡ã C (1100 ¡ã F);
High yield strength and tensile strength npn820 ¡ã C (1500 ¡ã F);
High resistance to oxidation at 980 ¡ã C (1800 ¡ã F);
Excellent mechanical properties at low temperatures;
Good corrosion resistance at high and low temperatures, as well as resistance to corrosion cracking;
Main areas of use:
industrial and aviation turbines;
high pressure cylinders;
pressing and deforming equipment;
springs, bellows, bolts.
Various products are produced from this alloy according to ASTM standards:
B637 - Bars, Forgings, High Temperature Forges.
Steel P500QL - 1.8875
Steel X90M - 1.8753
Steel GL-A 420
Steel 140 Cr 2 - 1.2008
EBERLE 7 steel
Steel BSt 420 S - 1.0428
Steel products according to EN
Inconel 625 / UNS N06625 / 2.4856 Inconel 601 / UNS N06601 / 2.4851 Inconel 718 / UNS N07718 / 2.4668 Inconel 690 / UNS N06690 / 2.4642
Inconel 617 / UNS N06617 / 2.4663 Inconel X-750 / UNS N07750 / 2.4669 Inconel 600 / UNS N06600 / 2.4816 1.4876 / 1.4958:
Incoloy 800HT / UNS N08811 / 1.4959 Incoloy 825 / UNS N08825 / 2.4858 Incoloy 800H / UNS N08810 / 1.4958 Incoloy 20 / UNS N08020 / 2.4660
Incoloy 925 / UNS N09925 Hastelloy B-2 / UNS N10665 / 2.4617 Hastelloy C-276 / UNS N10276 / 2.4819 Hastelloy C-22 / UNS N06022 / 2.4602
Hastelloy B-3 / UNS 10675 / 2.4600 Hastelloy C-4 / UNS N06455 / 2.4610 Hastelloy X / UNS N06002 / 2.4665 Monel 400 / UNS N04400 / 2.4360
Monel K-500 / UNS N05500 / 2.4375 Monel R-405 / UNS N04405