What is 1.2363 Tool Steel?

1.2363 tool steel, known globally by its AISI designation A2, is a versatile, air-hardening, cold work tool steel that bridges the gap between oil-hardening grades (like O1) and high-carbon, high-chromium grades (like D2). In the world of precision engineering and toolmaking, selecting the right steel is often a balancing act between wear resistance and toughness. 1.2363 offers an exceptional compromise, providing high dimensional stability during heat treatment alongside excellent wear resistance and good toughness properties. 

This grade is characterized by its 5% chromium content, which allows it to achieve deep hardening properties when air-quenched. Because it is air-hardening, it undergoes significantly less distortion during heat treatment compared to oil-hardening or water-hardening steels. This makes DIN 1.2363 the material of choice for complex dies, punches, and forming tools where maintaining tight tolerances is critical. 

For engineers and procurement professionals, choosing 1.2363 tool steel means investing in reliability. Whether you are manufacturing cutting tools, blanking dies, or precision gauges, this steel ensures your tools maintain their edge and structural integrity under high-stress conditions. At Nifty Alloys LLC, we understand the critical nature of these applications and supply high-quality, certified material to meet these rigorous demands. 
 

GRADE OVERVIEW 

When sourcing this material, you will encounter several designations depending on the regional standard used. The primary European designation is DIN 1.2363, while the American standard classifies it as AISI A2. 

• Common Names: 1.2363, AISI A2, DIN X100CrMoV5-1, BA 2. 
• Standard References: DIN 17350, EN ISO 4957, ASTM A681. 
• Delivery Condition: Typically supplied in the annealed condition, with a maximum hardness of approximately 215–240 HB (Brinell Hardness), making it ready for machining prior to heat treatment. 

This grade is defined as a "Cold Work Tool Steel," meaning it is specifically engineered for applications where the tool surface temperature does not exceed 200°C (392°F) during operation. Its balanced alloy profile ensures that it provides safer hardening capabilities than O1 steel and better toughness than D2 steel.