There are several industries that typically use 15Mo3 steel grade. These include:

1. Power Generation: 15Mo3 steel grade is commonly used in power plants for high-temperature applications such as boiler tubes and pressure vessels. Its high-temperature resistance and excellent creep resistance make it an ideal choice for these applications.

2. Petrochemical Industry: 15Mo3 steel grade is also widely used in the petrochemical industry for equipment and piping systems that are subjected to high temperatures and corrosive environments. Its resistance to oxidation and corrosion makes it a suitable material for these applications.

3. Oil and Gas Industry: The oil and gas industry often uses 15Mo3 steel grade for equipment and components exposed to high temperatures and high-pressure conditions. Its strength and temperature resistance make it suitable for use in pipelines, valves, and other critical components in the industry.

4. Chemical Industry: 15Mo3 steel grade finds application in the chemical industry due to its resistance to corrosion and high-temperature environments. It is used in the construction of reactors, columns, heat exchangers, and other equipment used in chemical processes.

5. Automotive Industry: 15Mo3 steel grade is used in the automotive industry for exhaust system components and other parts that may be exposed to elevated temperatures. Its high-temperature resistance and durability make it a suitable material for these applications.

6. Construction Industry: In the construction industry, 15Mo3 steel grade is used for structural components in buildings and infrastructure that require high strength and resistance to environmental factors such as corrosion and extreme temperatures.

7. Medical Industry: 15Mo3 steel grade is used in the medical industry for the production of surgical instruments and implants. Its biocompatibility and resistance to corrosion make it suitable for these applications.

8. Aerospace Industry: 15Mo3 steel grade is used in the aerospace industry for various components that require high strength and resistance to high temperatures. Its lightweight and high-temperature resistance properties make it a preferred choice for aerospace applications.

Overall, due to its mechanical properties, yield and tensile strength, and chemical composition, 15Mo3 steel grade finds extensive use in various industries that require reliable, durable, and sustainable materials in high-temperature and corrosive environments.