Inconel alloy Inconel 725 characteristics and application areas

Inconel 725 (also known as Inconel 725) is a nickel-based high-temperature alloy with excellent corrosion resistance and high-temperature strength that is widely used in oil and gas extraction and processing processes. It is resistant to sulfide corrosion, acid gases and high temperature and pressure environments. In these applications, it is often used to manufacture valves, pipes, fittings, wellhead equipment, storage tanks, and more.

Inconel 725 is widely used in the aerospace industry due to its excellent high temperature strength, oxidation resistance and corrosion resistance. It is commonly used to manufacture turbine components (such as turbine blades and turbine disks), combustor parts, nozzles and combustion chamber parts.

Inconel 725 has excellent corrosion resistance against acidic, alkaline and corrosive media and is widely used in chemical production processes. It can be used to manufacture chemical reactors, storage tanks, heat exchangers, device pipelines, catalyst supports, etc.

Inconel 725 plays an important role in the nuclear industry. Its radiation resistance and stability of chemical and mechanical properties make it suitable for nuclear fuel reprocessing in nuclear reactors, nuclear waste treatment and other nuclear process applications.

Inconel 725 can also be used in automobile manufacturing, chemical production, marine engineering, petrochemical industry and other fields to meet high temperature, corrosion resistance and high strength requirements.

Inconel 725 alloy processing method:

1. Cutting processing: When drilling, milling and turning Inconel 725, appropriate cutting parameters should be selected, including cutting speed, feed rate and cutting depth. Cutting at low speeds and high feeds is often required to reduce heat build-up, extend tool life and ensure machined surface quality.

2. Brazing: Inconel 725 can be used for welding, but attention needs to be paid to selecting appropriate welding materials and welding processes to ensure the quality and performance of the welded joints. Commonly used welding methods include argon arc welding, electron beam welding, TIG welding, etc.

3. Heat treatment: Inconel 725 material may require heat treatment after processing to eliminate processing stress, improve the mechanical properties of the material, and adjust the organizational structure. Heat treatment parameters need to be selected appropriately based on specific material thickness, size and product requirements.

4. Tool selection: In cutting processing, it is very important to select the appropriate tool material and shape design. Carbide tools are usually used for cutting Inconel 725, but attention needs to be paid to the cooling and lubrication methods of the tool to ensure that overheating and tool damage are not caused during cutting.

5. Cooling lubrication: Appropriate cooling lubricant must be used during processing to reduce processing temperature, extend tool life, reduce cutting heat-affected zones, and avoid oxidation and hardening of the material surface.

Inconel 725 Inconel alloy mechanical properties:

Yield tensile strength (0.2% tensile strength): ≥1050 MPa (152,000 psi)

Tensile strength: ≥1400 MPa (203,000 psi)

Elongation: ≥12%

Hardness: Typical hardness range is 30-40 HRC under experienced handling conditions

Chemical composition of Inconel725 alloy:

Carbon C: ≤0.03

Silicon Si: ≤0.20

Manganese Mn: ≤0.35

Phosphorus P: ≤0.015

Sulfur S: ≤ 0.01

Chromium Cr: 19.00~22.50

Nickel Ni: 55.00~59.00

Molybdenum Mo: 7.00~9.50

Titanium Ti: 1.00~1.70

Aluminum Al: ≤0.35

Niobium Nb: 2.75~4.00