X40CrMoV5-1 / 1.2344 Tool Steel

Forms of delivery of steel circle 1.2344 / 4Kh5MF1S

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Steel 1.2344 / 4Х5МФ1С: Properties, Applications, and Features

✅ General Technical Characteristics

Steel 1.2344 (4Х5МФ1С), also known as AISI H13, is a hot-work tool steel renowned for its high strength at elevated temperatures and excellent resistance to thermal shock. It possesses good toughness and thermal conductivity, making it ideal for applications involving significant thermal loads.

Main Characteristics:

• High strength at elevated temperatures.
• Excellent resistance to thermal shock.
• Good toughness and thermal conductivity.
• Resistance to wear and oxidation.
• Good machinability and polishability.

🔬 Chemical Composition (%):

• Carbon (C): 0.37–0.44
• Silicon (Si): 0.90–1.20
• Manganese (Mn): 0.20–0.50
• Chromium (Cr): 4.50–5.50
• Molybdenum (Mo): 1.20–1.50
• Vanadium (V): 0.80–1.10

This composition ensures an optimal balance between strength, hardness, and resistance to thermal loads.

🏭 Applications

Due to its outstanding properties, 1.2344 steel is widely used in the manufacture of tools and components subjected to high thermal and mechanical stresses.

Main Application Areas:

• Die-casting molds for zinc, aluminum, and magnesium alloys.
• Hammer and press inserts (with cross-sections up to 200–250 mm) for hot forming of structural steels.
• Tools for heading blanks made of alloyed and heat-resistant materials on horizontal forging machines.
• Hot cutting knives.
• Hot extrusion tools.

📊 Mechanical Properties

• Tensile strength (σ_в): 1670 MPa
• Yield strength (σ_Т): 1470 MPa
• Elongation (δ₅): 10%
• Reduction of area (ψ): 40%
• Impact toughness (KCU): 390 kJ/m²
• Hardness after annealing: ≤ 241 HB

These properties make 1.2344 steel suitable for applications involving high mechanical and thermal loads.

⭐ Features

• Thermal Conductivity: Ensures uniform heat distribution, reducing the risk of thermal cracking.
• Wear Resistance: Extends tool life under intensive use.
• Polishability: Allows achieving high surface quality, which is important for certain applications.
• Weldability: Limited; preheating and subsequent heat treatment are recommended to prevent cracking.

1.2344 steel is an optimal choice for the production of tools operating under high temperatures and requiring high resistance to thermal shock and wear.