Schmolz + Bickenbach Cryodur® 2379 (D-2) Cold Work Die Steel

Schmolz + Bickenbach Cryodur® 2379 (D-2) Cold Work Die Steel Product Information -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach Cryodur® 2379 (D-2) Cold Work Die Steel Synonyms -:- For detailed product information, please contact sales. -:

Schmolz + Bickenbach Cryodur® 2379 (D-2) Cold Work Die Steel Product Information -:- For detailed product information, please contact sales. -: ### **Schmolz + Bickenbach Cryodur® 2379 (D-2) - High-Carbon High-Chromium Cold Work Tool Steel** **Introduction** Cryodur® 2379 is a premium high-carbon, high-chromium ledeburitic (air-hardening) cold work tool steel manufactured by Schmolz + Bickenbach, a global leader in specialty steel production. It corresponds to the classic AISI D2 / DIN 1.2379 grade. This steel is renowned for its exceptional **wear resistance**, high **compressive strength**, and good **dimensional stability** during heat treatment. It is a versatile choice for demanding applications where resistance to abrasive wear and moderate corrosion is paramount. **Key Features & Advantages** * **Outstanding Wear Resistance:** Primarily due to its high carbon and chromium content, which forms a large volume of hard, complex carbides in the microstructure. * **Good Dimensional Stability:** Exhibits minimal distortion during the air or oil quenching process, crucial for precision tools and dies. * **High Compressive Strength:** Can withstand high pressures without deformation, suitable for forming and stamping applications. * **Moderate Corrosion Resistance:** The high chromium content provides better corrosion resistance compared to lower-alloyed tool steels (like O1 or A2), though it is not a stainless steel. * **Excellent Through-Hardenability:** Can be hardened to high uniform hardness in large cross-sections. **International Standard Designations** | Standard | Designation | | :--- | :--- | | **AISI** | D2 | | **DIN / EN / W-Nr.** | 1.2379 / X153CrMoV12 | | **JIS** | SKD11 | | **ISO** | 160CrMoV12 | | **GB (China)** | Cr12Mo1V1 | **Chemical Composition (%)** The typical composition is fundamental to Cryodur® 2379's properties. | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Silicon (Si) | Manganese (Mn) | | :---: | :---: | :---: | :---: | :---: | :---: | | 1.50 - 1.60 | 11.00 - 12.00 | 0.70 - 0.90 | 0.90 - 1.10 | 0.10 - 0.40 | 0.15 - 0.45 | *Note: Iron (Fe) constitutes the remainder. Small amounts of other elements like Phosphorus (P) and Sulfur (S) are kept at very low levels.* **Physical & Mechanical Properties** *Typical values at room temperature in annealed & hardened conditions.* | Property | Value / Condition | | :--- | :--- | | **Density** | 7.70 g/cm³ | | **Thermal Conductivity** | ~20.0 W/(m·K) (at 20°C) | | **Coefficient of Thermal Expansion** | ~10.5 x 10⁻⁶/K (20-200°C) | | **Hardness (Annealed)** | ≤ 250 HB | | **Hardness (Hardened & Tempered)** | 58 - 62 HRC (typical working hardness, depends on tempering temperature) | | **Elastic Modulus** | ~210 GPa | **Heat Treatment** * **Soft Annealing:** Heat to 780 - 800°C, slow cool to 650°C, then air cool. Target hardness: ≤ 250 HB. * **Stress Relieving (after machining):** 600 - 650°C, slow cool. * **Hardening:** Pre-heat at 750-800°C, then austenitize at **1020 - 1040°C** (exact temperature depends on desired toughness vs. wear resistance). Soak adequately, then quench in **air (preferred for minimal distortion)** or oil. * **Tempering:** **Mandatory immediately after quenching.** Typically double or triple tempered at **180 - 250°C** for 58-62 HRC, or at **400 - 540°C** for lower hardness (54-58 HRC) with increased toughness. *Note: Avoid the tempering range of 250-400°C due to risk of decreased toughness.* **Typical Applications** Cryodur® 2379 (D-2) is ideally suited for long-run production tools subjected to severe abrasive wear. * **Blanking & Punching Dies:** For sheet metal, particularly for abrasive materials (e.g., plastics, composites, fiber-reinforced materials, pre-coated metals). * **Forming Tools & Rolls:** Cold forming rolls, thread rolling dies, bending tools. * **Shear & Slitter Knives:** Industrial knives for cutting hard or abrasive materials. * **Powder Compaction Dies:** For compacting metal or ceramic powders. * **Precision Gauges & Measuring Tools:** Where dimensional stability and wear life are critical. * **Other Tooling:** Lamination dies, drawing dies, and wear plates. **Availability** Schmolz + Bickenbach supplies Cryodur® 2379 in various forms: forged and rolled bars, flats, blocks, and pre-finished precision ground stock. **Disclaimer:** This datasheet provides general information. For critical applications, always consult the official technical data sheets from Schmolz + Bickenbach and rely on the expertise of qualified metallurgists and tooling engineers for specific heat treatment and machining parameters. -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach Cryodur® 2379 (D-2) Cold Work Die Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7139 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach Cryodur® 2379 (D-2) Cold Work Die Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Schmolz + Bickenbach Cryodur® 2379 (D-2) Cold Work Die Steel -:- For detailed product information, please contact sales. -: Chemical Identifiers Schmolz + Bickenbach Cryodur® 2379 (D-2) Cold Work Die Steel -:- For detailed product information, please contact sales. -:

Packing of Schmolz + Bickenbach Cryodur® 2379 (D-2) Cold Work Die Steel -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3610 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition