25CrMo4, 1.7218 – Structural steel

Grade 25CrMo4 steel, also known as 1.7218, is a high strength alloy steel that is widely used in various industries.

Drawn and hot-rolled bars from 12 mm to 300 mm in diameter in stock. Forged bars, hexagons available on order according to EN 10083 and EN 10269.

Properties of 25CrMo4 steel

25CrMo4, 1.7218 steel is known for its high strength and toughness. These properties make it an ideal choice for the manufacture of components that must withstand high stresses and dynamic loads. Key mechanical properties of this steel include:

• High strength: 25CrMo4 steel is characterized by high strength, which means it withstands high forces and loads without deformation.
• Toughness: This steel is capable of absorbing impact energy, which provides it with excellent resistance to fractures and cracks.
• Wear resistance: Due to its composition and heat treatment, this steel is highly resistant to wear, which extends its service life.
• Good weldability: 25CrMo4 steel is easy to weld, which facilitates its use in the production of complex structures.
• High corrosion resistance: This steel also has good resistance to corrosion, which enhances its usability in demanding conditions.

Chemical composition of 25CrMo4 steel

The chemical composition of this steel is carefully designed to provide an optimal combination of mechanical properties and resistance. Below is the typical chemical composition of 25CrMo4, 1.7218 steel:

• Carbon (C): 0.22–0.29%
• Silicon (Si): 0.10–0.40%
• Manganese (Mn): 0.60–0.90%
• Chromium (Cr): 0.90–1.20%
• Molybdenum (Mo): 0.15–0.30%
• Phosphorus (P): max. 0.035%
• Sulphur (S): max. 0.035%

This composition provides the steel with excellent strength and durability. The presence of chromium and molybdenum ensures increased resistance to corrosion and wear.

Typical applications of 25CrMo4 steel

25CrMo4, 1.7218 steel is used in a range of industrial applications due to its excellent properties. The main areas of application include:

Automotive industry

25CrMo4 steel is frequently used in the manufacturing of automotive components, such as axles, transmission shafts, and other critical parts that require high strength and toughness. Thanks to its resistance to wear and corrosion, it is an ideal choice for long-term use in demanding conditions.

Mechanical engineering

In mechanical engineering, this steel is used for the production of various machine parts, such as gears, shafts, and bearings. These components must withstand high loads and impacts. Its good weldability and machinability facilitate the production and assembly of complex mechanical systems.

Energy industry

25CrMo4 steel is also used in the energy industry for the production of components that operate in demanding conditions. Examples include steam and gas turbines, pressure vessels, and boilers. Its high strength and resistance to high temperatures make it an ideal material for these applications.

Aerospace industry

In the aerospace industry, this steel is used for the production of aircraft structural parts that require a combination of high strength, toughness, and low weight. Its properties make it possible to ensure the safety and reliability of aircraft under extreme loads and conditions.

25CrMo4, 1.7218 steel is a versatile material with excellent mechanical properties and durability, widely used across various industries. Thanks to its composition and properties, it is an ideal choice for the production of demanding components withstanding high stress and challenging conditions. When selecting a material for your projects, consider using steel 25CrMo4, 1.7218, ČSN EN 15130, and take advantage of its unique properties to achieve the best results.