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Nickel Alloy Steel Inconel 718 Superalloy Seamless Tube NiCr19Fe19Nb5 / N07718
Inconel 718 W.Nr.2.4668 Superalloy Seamless Tube NiCr19Fe19Nb5 / N07718
Inconel 718 ( W.Nr.2.4668 ) Superalloy Seamless Tube NiCr19Fe19Nb5 / N07718
Material designation: Inconel 718 nickel based alloy
US grade: N07718
German grade: W.Nr.2.4668 / NiCr19Fe19Nb5
French grade: Nc19FeNb
Overview of Inconel 718 (N07718) nickel-based alloy:
The chemical composition of this alloy is divided into 3 categories: standard composition, high-quality composition, and high-purity composition, see Table 1-1. The high-quality ingredients reduce carbon and increase niobium on the basis of standard ingredients, thereby reducing the amount of niobium carbide, reducing fatigue sources and increasing the number of strengthening phases, and improving fatigue resistance and material strength. At the same time reduce harmful impurities and gas content. High-purity ingredients reduce the content of sulfur and harmful impurities on the basis of high-quality standards, and improve the purity and comprehensive performance of materials.
Inconel718 alloy for nuclear energy applications needs to control the boron content (the other element composition is unchanged), and the specific content is determined by the supplier and the buyer through consultation. When ω (B) ≤ 0.002%, it is distinguished from the Inconel718 alloy used in the aerospace industry, and the alloy grade is Inconel718A.
Table1-1 %
| type | C | Cr | Ni | Co | Mo | Al | Ti | Fe | ||||||||
| normal | ≤0.08 | 17.0~21.0 | 50.0~55.0 | ≤1.0 | 2.80~3.30 | 0.30~0.70 | 0.75~1.15 | Balance | ||||||||
| high- grade | 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 | Balance | ||||||||
| 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 | Balance | ||||||||
| type | Nb | B | Mg | Mn | Si | P | S | Cu | Ca | |||||||
| ≤ | ||||||||||||||||
| normal | 4.75~5.50 | 0.006 | 0.01 | 0.35 | 0.35 | 0.015 | 0.015 | 0.30 | 0.01 | |||||||
| high- grade | 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 | |||||||
| type | Bi | Sn | Pb | Ag | Se | Te | Tl | N | O |
| ≤ | |||||||||
| normal | --- | --- | 0.0005 | --- | 0.0003 | --- | --- | --- | --- |
| high- grade | 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 |
specification:
Outer diameter Φ6—630mm; wall thickness: 1-50mm, maximum length 18000mm
Special specifications are available upon negotiation.
