Products
Product Center
Inconel718
Classification:
- Product Description
-
Material designation: Inconel718 nickel-based alloy
American brand: NO7718
German brand: W.Nr. 2.4668/NiCr19Fe19Nb5
French brand: Nc19FeNb
Inconel718(n07718) Nickel-Base Alloy Overview
Inconel718 alloy is a nickel-based high-temperature alloy with body-centered tetragonal phase γ′ and FCC γ′ phase precipitation strengthening. It has good comprehensive performance in the range of -253 ℃ ~ 700 ℃. The yield strength below 650 ℃ is the first in the deformation of high-temperature alloys, with good fatigue resistance, radiation resistance, oxidation resistance and corrosion resistance, good workability, weldability and long-term structural stability, can be manufactured in a variety of shapes of complex parts, in the aerospace, nuclear energy, petroleum industry, petroleum industry and other fields have a wide range of applications in the above temperature range has been widely used.
Another characteristic of the alloy is that the alloy structure is particularly sensitive to the hot working process. Master the precipitation and dissolution law of the phase in the alloy and the relationship between the organization, process and performance, formulate reasonable and feasible process procedures according to different use requirements, and obtain various parts that meet different strength levels and use requirements. The products we supply include forgings, forged rods, rolled rods, cold-rolled rods, round cakes, rings, plates, strips, wires, pipes, etc., which can be made into discs, rings, blades, shafts, fasteners and elastic elements, Plate structure, casing and other parts can be used in aviation for a long time.
Inconel718 material grade: Inconel718.
Inconel718 similar brands: Inconel718 (USA), nc19fenb (France).
Technical standard for Inconel718 materials
Inconel718 chemical composition: The chemical composition of the alloy can be divided into three categories: standard composition, high-quality composition and high-purity composition, as shown in Table 1-1. High-quality components can reduce carbon and increase niobium on the basis of standard components, thereby reducing the amount of niobium carbide, reducing fatigue sources, increasing the number of strengthening phases, and improving fatigue resistance and material strength. At the same time, the content of harmful impurities and gases is reduced. The high-purity component is to reduce the content of sulfur and harmful impurities on the basis of high-quality standards, and improve the purity and comprehensive performance of the material.
The boron content of Inconel718 alloy for nuclear energy needs to be controlled (other elements remain unchanged), and the specific content is determined by both parties through negotiation. When ω (B) ≤ 0.002%, the alloy grade is inconel718a, unlike the Inconel718 alloy used in the aerospace industry.
Category C Cr Ni Co Mo Al Ti Fe Standard ≤ 0.08 17.0~21.0 50.0~55.0 ≤ 1.0 2.80~3.30 0.30~0.70 0.75~1.15 Surplus Quality 0.02~0.06 17.0~21.0 50.0~55.0 ≤ 1.0 2.80~3.30 0.30~0.70 0.75~1.15 Surplus high purity 0.02~0.06 17.0~21.0 50.0~55.0 ≤ 1.0 2.80~3.30 0.30~0.70 0.75~1.15 Surplus Category Nb B Mg Mn Si P S Cu Ca not greater Standard 4.75~5.50 0.006 0.01 0.35 0.35 0.015 0.015 0.30 0.01 Quality 5.00~5.50 0.006 0.01 0.35 0.35 0.015 0.015 0.30 0.01 high purity 5.00~5.50 0.006 0.005 0.35 0.35 0.015 0.002 0.30 0.005 Category Bi Sn Pb Ag Se You Tl N O not greater Standard --- --- 0.0005 --- 0.0003 --- --- --- --- Quality 0.001 0.005 0.001 0.001 0.0003 --- --- 0.01 0.01 high purity 0.00003 0.005 0.001 0.001 0.0003 0.00005 0.0001 0.01 0.005 Inconel718 heat treatment system: The alloy adopts different heat treatment systems to control the grain size, shape, distribution and quantity of the δ phase, so as to obtain different degrees of mechanical properties.
Alloy heat treatment system can be divided into three types
(1) (1010~1065)℃ 10 ℃,1h, oil cooling, air cooling or water cooling 720 ℃ 5 ℃,8h, furnace cooling 50 ℃/h to 620 ℃ 5 ℃,8h, air cooling. The results show that the treated material has coarse grains, no δ phase in grain boundaries and grains, and notch sensitivity, but it is beneficial to improve the impact performance and low temperature hydrogen embrittlement resistance of the material.
(2) (950~980)℃ 10 ℃,1h, oil cooling, air cooling or water cooling 720 ℃ 5 ℃,8h, furnace cooling 50 ℃/h to 620 ℃ 5 ℃,8h, air cooling. It is the most commonly used heat treatment system, also known as the standard heat treatment system.
(3) Cooling at a rate of 50 ℃/h to 620 ℃ ± 5 ℃ for 8h and air cooling for 8h.
After treatment, the δ in the material is relatively small, which can improve the strength and impact performance of the material. This system is also known as a direct aging heat treatment system.
Inconel718 specifications and supply status: can provide die forgings (disc forgings and integral forgings), cakes, rings, bars (forged rods, rolled rods, cold-drawn rods), plates, wires, belts, tubes, fasteners of different shapes and sizes, Elastic components, etc. The delivery status shall be determined by both parties. The conductors shall be delivered in pallets under the agreed delivery conditions.
Key words:
Inconel718
Product inquiry
Related Products
