1.2379 Tool Steel (D2): The Ultimate Guide 

Material 1.2379 is a high-performance, air-hardening tool steel renowned for its exceptional properties. Classified as a high-carbon, high-chromium cold-work tool steel, it stands as a benchmark for durability and performance in demanding industrial applications. The unique chemistry of 1.2379 tool steel provides an excellent balance of wear resistance, toughness, and compressive strength, making it a preferred choice for tools that must withstand severe service conditions. 

Its popularity is rooted in its ability to maintain a sharp cutting edge and resist abrasion, which is why you will find 1.2379 steel used extensively in tooling, dies, and high-wear components for cold-work operations. We supply this versatile material in various forms to meet your specific project requirements, including round bars, flat bars, and tool steel plates. Each form is manufactured to strict standards, ensuring you receive certified material ready for immediate fabrication. 

What Is Material 1.2379 Steel? 

Material 1.2379 is a versatile cold-work tool steel designated under the DIN/W-Nr standard. It is internationally recognized and corresponds to the AISI D2 tool steel grade. As a 12% chromium tool steel, it offers a superior combination of properties that make it a leading choice for manufacturing durable and long-lasting tools. The high chromium content is fundamental to its performance, creating hard, abrasion-resistant chromium carbides within the steel's microstructure. 

So, why is 1.2379 D2 a preferred choice for wear-resistant tooling? The answer lies in its key attributes: 

• High Hardness: After proper heat treatment, it can achieve hardness levels up to 62 HRC, providing excellent resistance to deformation and wear. 
• Superior Wear Resistance: The dense network of chromium carbides makes it exceptionally resistant to abrasive and adhesive wear, extending tool life significantly. 
• Excellent Edge Retention: For cutting applications, its ability to hold a sharp edge reduces downtime and maintenance costs. 
• High Compressive Strength: It can withstand high pressures without cracking or deforming, making it ideal for stamping and forming dies. 
• Good Dimensional Stability: It exhibits minimal distortion during the hardening process, ensuring precision for complex tool geometries. 

These characteristics make it the go-to material for applications where performance and reliability are non-negotiable.