Dievar: High-Performance Hot Work Tool Steel for Extreme Applications

2025-02-17 15:00

Dievar is a premium hot work tool steel designed for superior toughness, thermal fatigue resistance, and high-temperature performance. It is widely used in die-casting, forging, extrusion, and other demanding applications where high durability and wear resistance are required.

Chemical Composition and Properties

Element	Composition (%)
Carbon (C)	0.35 - 0.40
Chromium (Cr)	4.5 - 5.2
Molybdenum (Mo)	2.2 - 2.8
Vanadium (V)	0.5 - 0.8
Silicon (Si)	0.2 - 0.5
Manganese (Mn)	0.2 - 0.5
Other Elements	Balance Iron (Fe)

Key Features of Dievar Steel

Exceptional Toughness – High impact resistance, minimizing cracking under stress.
High Thermal Fatigue Resistance – Withstands repeated heating and cooling cycles.
Superior Wear Resistance – Ensures long service life in high-pressure applications.
Excellent Machinability – Easy to process and machine into complex components.
Optimized for Heat Treatment – Achieves high hardness and durability after quenching and tempering.

Applications of Dievar Steel

Industry	Applications
Die-Casting	Molds and dies for aluminum, magnesium, and zinc casting.
Forging	Hot forging dies and punches.
Extrusion	High-performance extrusion dies for aluminum and steel.
Plastic Molding	High-pressure injection molds for demanding materials.
General Engineering	High-strength structural components in industrial applications.

Advantages of Dievar Over Other Tool Steels

Higher Toughness Than H13 & 1.2344 – Reduces risk of cracking under mechanical and thermal stress.
Better Thermal Fatigue Resistance – Minimizes heat checking compared to conventional hot work steels.
Longer Service Life – Extended die lifespan reduces maintenance costs and downtime.
Improved Heat Treatment Response – Consistently achieves high hardness with excellent stability.

FAQ: Dievar Hot Work Tool Steel

Question	Answer
Q1: What makes Dievar different from H13?	Dievar has superior toughness, thermal fatigue resistance, and wear resistance compared to H13.
Q2: What is the ideal hardness range for Dievar in tooling?	Typically, 50 - 55 HRC after heat treatment for optimal performance.
Q3: Can Dievar be used in high-temperature applications?	Yes, it is specifically designed for high-heat and high-pressure environments.
Q4: What industries benefit most from Dievar steel?	Die-casting, forging, extrusion, and high-performance plastic molding.
Q5: Is Dievar difficult to machine?	No, it offers good machinability before hardening and maintains stability after heat treatment.
Q6: How does Dievar resist thermal cracking?	Its optimized alloy composition and heat treatment response reduce heat checking and thermal fatigue.
Q7: Can Dievar be nitrided for additional wear resistance?	Yes, nitriding enhances surface hardness and extends tool life.
Q8: What are the best processing methods for Dievar?	Heat treatment with controlled quenching and tempering ensures optimal mechanical properties.

Conclusion

Dievar is a top-tier hot work tool steel engineered for extreme performance in die-casting, forging, and extrusion applications. With exceptional toughness, thermal fatigue resistance, and wear resistance, it extends the service life of tools and molds, reducing downtime and costs. Ideal for industries demanding high-strength, high-temperature durability, Dievar is the preferred choice for long-lasting tooling solutions.