What is the properties of DIN Steel?

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Understanding the Properties of DIN 2738 Steel

DIN 2738 steel is primarily utilized for plastic injection die molds. This type of steel showcases essential characteristics, including accurate sharpening, photo-etching properties with high purity, and excellent homogeneity. The DIN designation is an upgraded version of plastic mold steel, which is generally supplied in a pre-hardened condition. Its hardness ranges between 280 and 320 HB, ensuring uniformity throughout the material. Notably, the 1% nickel content enhances through-hardening capabilities, making it suitable for various machining processes.

Composition and Core Features of DIN 2738

Designated as a premium mold steel, DIN 2738 is known for its remarkable polishability, wear resistance, and toughness, allowing it to excel in diverse tooling applications. Compared to standard P20 grades, this specially formulated mold steel offers enhanced toughness and machinability.

Comparison with Other Tool Steels

DIN 2738 steel finds extensive use in the cold work steel category, especially within the plastic mold industry. This steel type is equivalent to P20+Ni and AISI P20+Ni tool steel. When it comes to polishability, DIN steels significantly outperform AISI P20+S, exhibiting better machinability. Additionally, surface treatments like nitrogenation and flame hardening can improve the hardness and wear resistance of the mold surface material. The melting process involves an electrical furnace with refinement utilizing VOD or DH equipment.

Chemical Composition

DIN 2738:
Carbon (C): 0.35-0.45%, Manganese (Mn): 1.30-1.60%, Silicon (Si): 0.20-0.40%, Phosphorus (P): 0.030%, Sulfur (S): 0.030%, Chromium (Cr): 1.80-2.10%, Nickel (Ni): 0.90-1.20%, Molybdenum (Mo): 0.15-0.25%

P20+Ni:
Carbon (C): 0.28-0.40%, Manganese (Mn): 0.60-1.00%, Silicon (Si): 0.20-0.80%, Phosphorus (P): 0.030%, Sulfur (S): 0.030%, Chromium (Cr): 1.40-2.00%, Nickel (Ni): 0.80-1.20%

Mechanical Properties

DIN 2738:
Tensile Strength: 980 MPa
Yield Strength: 800 MPa
Elongation: 15%
Hardness: 280-325 HB

P20+Ni:
Tensile Strength: 900 MPa
Yield Strength: 900 MPa
Elongation: 12%
Hardness: 280-325 HB

Physical Properties

Both DIN 2738 and P20+Ni exhibit a density of approximately 7.85 g/cm³. The thermal conductivity of these steels measures around 30-35 W/(m·K). Their specific heat capacity approximately ranges from 460 to 480 J/(kg·K), with a linear coefficient of thermal expansion of around 11-12 x 10^-6 /K.

Applications of DIN 2738

DIN 2738 is widely applicable in various domains, such as manufacturing large and small plastic mold dies for automotive industries, dies for domestic goods, high finishing plastic dies, booster plates for presses, die holders, and shoe blocks for drop hammers, among others.

At Virat Special Steels, we offer DIN 2738 in various sizes and conditions, ensuring that we meet your specific requirements. Our team of experts is available to assist with any inquiries related to DIN steel.

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