Views: 11 Author: Site Editor Publish Time: 2024-12-24 Origin: Site
Incoloy 825 flange is a nickel-iron-chromium alloy with additions of molybdenum and copper. This nickel steel alloy’s chemical composition is designed to provide exceptional resistance to many corrosive environments. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localized attack such as pitting and crevice corrosion. Incoloy 825 is especially resistant to sulfuric and phosphoric acids. This nickel steel alloy is used for chemical processing, pollution-control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production, and pickling equipment.
Incoloy 825 Flange Standard
The nickel-iron-chromium alloys are UNS NO8120,UNS NO8800, UNS NO8810, and UNS NO8811. Alloy UNSN08800 is normally employed in service temperatures up to and including 1100°F (593℃). Alloys UNS N08810, N08120,and UNS N0881 1 are normally employed in service temperatures above 1100°F (593℃) where resistance to creep and rupture is required, and are annealed to develop controlled grain size for optimum properties in this temperature range.
Nickel-iron-chromium-tungsten alloy UNS N06674 is normally employed in service temperatures above 1100°F(593℃) where resistance to creep and rupture is required, and is annealed to develop optimum properties in this temperature range.
Dimensions and Permissible Variations
Dimensions and tolerances shall be as specified on theapplicable forging sketch or drawing.
Workmanship, Finish, and Appearance
The material shall be uniform in quality and condition,sound, and free of injurious imperfections.
Sampling
Lot Definition:
A lot for chemical analysis shall consist of one heat.
A lot for mechanical properties and grain size testing shall consist of all material from the same heat, size, finish,condition, and processed at one time.
Test Material Selection:
Chemical Analysis-Representative samples shall betaken during pouring or subsequent processing.
Product(check)analysis shall be wholly the responsibility of the purchaser.
Advantages of Incoloy 825 flange, Nickel Alloy 825, UNS N08825
●Excellent resistance to both reducing and oxidizing acids like sulfuric and phosphoric
●Helps avoid stress-corrosion cracking
●Stops localized attacks such as pitting and crevice corrosion
●High level of resistance to variety of oxidizing substances such as nitric acid, nitrates, and oxidizing salt
Incoloy 825 Flange Material
Incoloy 825 ASTM B564 Flange Specifications material
Specifications | ASTM B564 / ASME SB564 |
Dimension Standard | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN |
Standard Size Range | 1/2″NB TO 60″NB |
Class / Pressure | 150#, 300#, 825#, 900#, 1500#, 2500# | PN6, PN10, PN16, PN25, PN40, PN64 etc. |
Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
Grades | Incoloy 825 |
Incoloy 825 Flanges Equivalent
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST | OR |
| Incoloy 825 Flanges | N08825 | 2.4858 | NFE30C20DUM | NiCr21Mo | NCF 825 | NA 16 | ЭП703 | XH38BT |
ASTM B564 Incoloy 825 Chemical Table
CHEMICAL | LIMITS | C | Mn | Al | S | Si | Ni | Cr | Mo | Fe | Ti | Cu |
Incoloy 825 | MIN | 38.00 | 19.50 | 2.50 | 22.00 | 0.600 | 1.50 | |||||
MAX | 0.05 | 1.00 | 0.200 | 0.030 | 0.50 | 46.00 | 23.50 | 3.50 | 1.200 | 3.00 |
Nickel is one of the main components of Incoloy 825 alloy, which gives the alloy good corrosion resistance and high temperature strength. Nickel can form a stable oxide film on the surface of the alloy, preventing the contact between the corrosive medium and the base metal, thereby improving the corrosion resistance of the alloy.
Incoloy 825 Flanges Mechanical Properties
It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to locized attach such as pitting and crevice corrosion.
Incoloy | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
825 | 8.14 g/cm3 | 1400 ℃ (2550 °F) | 586Mpa (85 Ksi) | 241Mpa (35Ksi) | 30 % |
Incoloy 825 VS Inconel 625
In the oil and gas industry, the two most important nickel alloys are Inconel 625 and Incoloy 825 flange. The major difference between two materials is the nickel content value, for Inconel 625 Nickel 58% minimum, and for Incoloy 825 Nickel at range of 38% to 46%. And this makes the 625 material more expensive.
Incoloy 825
It is widely used in chemical, marine engineering, pharmaceutical and other industries. It is often used to manufacture equipment and components such as pipelines, containers, heat exchangers, flanges, etc., and is suitable for working conditions that handle various corrosive media.
Inconel 625
It is mainly used in high-end fields such as aerospace, nuclear energy, offshore oil and gas production, and chemical industry. It is often used to manufacture engine parts, gas turbine blades, deep-sea oil and gas production equipment and other key components that have extremely high material performance requirements.
