alloy725 alloy material performance analysis
Overview of superalloys;
High-temperature alloys are composed of chromium, molybdenum, cobalt, nickel, titanium, tungsten, boron, cerium, zirconium and other elements. They have excellent high-temperature oxidation resistance, excellent heat resistance, corrosion resistance and fatigue resistance, and good Comprehensive properties such as tensile strength and fracture toughness, also known as "superalloys", are a type of metal materials that can work in extreme environments for a long time. Therefore, they are widely used in aerospace, marine ships, petrochemicals, nuclear industries and energy. field.
Let's get back to the subject: alloy 725 nickel-chromium-molybdenum precipitation hardening alloy
Brand: alloy 725
United States UNS: N07725
Other namesInconel 725
Corresponding standard: American Standard
Classification: Nickel and nickel alloys
Performance: corrosion resistance
Tag: Nickel Chromium Molybdenum Precipitation Hardening Alloy
alloy 725 alloy is a versatile alloy with excellent corrosion resistance and high strength. Its chemical composition gives it excellent corrosion resistance in various corrosive environments, and high strength can be achieved through heat treatment. This makes Alloy 725 ideal for a wide range of sour gas services, marine applications and other areas where high strength and corrosion resistance are required.
alloy 725 chemical element content (%)
Nickel, Ni 55 - 59
Chromium, Cr 19 - 22.5
Iron, Fe 9
Molybdenum, Mo 7 - 9.50
Niobium (tantalum), Nb (Cb) 2.75 - 4
Titanium, Ti 1 - 1.70
Aluminum, Al 0.35
Manganese, Mn 0.35
Silicon, Si 0.20
Carbon, C 0.030
Phosphorus, P 0.015
Sulfur, S 0.010
Physical properties:
The physical properties of INCONEL®alloy725 are shown in the table below.
Properties Metric units Imperial units
Density 8.3 g/cm³ 0.3 lb/in³
Melting point 1271-1343ºC (2320-2449ºF)
Mechanical properties:
The mechanical properties of INCONEL®alloy725 are shown in the table below.
Properties Metric units Imperial units
Tensile strength 855 MPa 124,000 psi
Yield Strength (@0.2%) 427 MPa 62,000 psi
Modulus of elasticity 204 GPa 29,600 ksi
Poisson's ratio 0.31 0.31
Elongation at break 57% 57%
Hardness (Rockwell C) 5 5
alloy 725 has the following characteristics:
1. It has good corrosion resistance to reducing, oxidizing and nitriding media.
2. It has good resistance to stress corrosion cracking at room temperature and high temperature.
3. It has good corrosion resistance to dry chlorine and hydrogen chloride gas.
4. It has good mechanical properties at zero, room temperature and high temperature.
5. It has good lasting strength and is recommended to be used above 700℃
