34CrAlNi7-10, 1.8550, 15 340 – Nitriding steel

Grade 34CrAlNi7-10 steel, also known as 1.8550, is a special alloyed material with a high content of chromium, aluminium, and nickel.

Grade 34CrAlNi7-10, 1.8550 steel – Cr-Ni-Al nitriding steel for components requiring very high surface hardness and wear resistance.

It is used in the automotive industry and generally in engineering. Material suitable for cam discs, cams, gears, measuring instruments, components of injection pumps, valve spools, piston pins, etc.

This material is not suitable for welding. Therefore, it should not be used in welded structures.

Drawn and rolled bars from 20 mm to 300 mm in diameter in stock. Forged bars and blocks available on order.

Properties of 34CrAlNi7-10, 1.8550 steel, ČSN EN 15340

Material 34CrAlNi7-10, ČSN EN15 340, excels in several specific properties that make it an ideal material for demanding technical applications. Its main characteristics include:

• High strength and hardness: Due to the alloying with chromium and nickel, this steel achieves high levels of strength and hardness. This makes it suitable for the production of components exposed to high mechanical stress.
• Wear resistance: The addition of aluminium enhances the steel’s wear resistance, which is crucial for the long service life of components.
• Good resistance to thermal fatigue: The steel retains its mechanical properties even at high temperatures, which is important for applications in thermally demanding environments.
• Nitriding capability: The special chemical composition allows for the nitriding process, which further increases surface hardness and wear resistance.

Chemical composition

The chemical composition of 34CrAlNi7-10, 1.8550 steel is carefully designed to provide an optimal combination of properties. The main components of this steel include:

• Carbon (C): 0.30% – 0.40%
• Chromium (Cr): 1.50% – 1.80%
• Aluminium (Al): 0.95% – 1.30%
• Nickel (Ni): 1.50% – 1.80%
• Molybdenum (Mo): up to 0.30%
• Manganese (Mn): 0.50% – 0.80%
• Silicon (Si): up to 0.40%
• Phosphorus (P): max. 0.025%
• Sulphur (S): max. 0.035%

Typical applications

Material 34CrAlNi7-10, 1.8550, ČSN EN 15340 finds wide application in various industries due to its exceptional properties. Typical applications include:

Manufacturing of components for the automotive industry

High strength and wear resistance make this steel ideal for the production of components such as crankshafts, gears, and camshafts.

Mechanical engineering

The steel is often used for the production of tools and moulds that must withstand high stress and temperatures.

Aerospace industry

Due to its resistance to thermal fatigue and mechanical stress, it is used in the production of engine components and other critical aircraft parts.

Energy industry

34CrAlNi7-10 steel is used in energy equipment where high resistance to temperature and wear is required, such as in turbines and generators.

Grade 34CrAlNi7-10 steel, also known as 1.8550, represents a material with excellent mechanical properties and wear resistance. It also features excellent resistance to thermal fatigue. Due to its specific chemical composition and the ability to undergo nitriding, it is ideal for demanding industrial applications.