Cr12MoV is a high-carbon high-chromium cold work mold steel with excellent wear resistance, high hardness and good dimensional stability, which is known as the “wear-resistant king” in cold work mold steel. It is widely used in cold stamping, blanking, bending, drawing and other cold work scenarios, and can withstand strong wear and impact load during cold processing. Compared with ordinary cold work mold steel (such as Cr12), Cr12MoV has better toughness and thermal stability, which is not easy to crack during use. This article will detail the performance characteristics, chemical composition, application scenarios, heat treatment specifications and performance advantages of Cr12MoV mold steel, helping you fully understand and use this high-wear-resistance cold work mold steel.

Core Performance Characteristics of Cr12MoV Mold Steel

Cr12MoV mold steel is mainly characterized by high hardness, high wear resistance and good dimensional stability, which is especially suitable for cold work scenarios requiring strong wear resistance:

• Excellent Wear Resistance: Cr12MoV contains high content of chromium (11-13%) and carbon (1.45-1.70%), which can form a large number of carbides after heat treatment, with extremely high wear resistance. It can withstand long-term friction and wear during cold stamping and blanking, significantly extending the service life of the mold.
• High Hardness: After proper heat treatment, the hardness of Cr12MoV can reach 60-64 HRC, which is much higher than that of hot work and plastic mold steel, and can withstand strong pressure and wear during cold work.
• Good Dimensional Stability: Cr12MoV has small deformation during heat treatment, stable structure, and can ensure the dimensional accuracy of the mold, suitable for high-precision cold work molds (such as precision blanking molds).
• Better Toughness Than Cr12: Compared with Cr12 mold steel, Cr12MoV adds molybdenum and vanadium elements, which can refine the grain, improve toughness, and avoid mold cracking caused by brittleness during cold work.
• Good Thermal Stability: Cr12MoV has good thermal stability, which can withstand the heat generated during cold work (such as friction heat) without obvious softening, ensuring stable mold performance.

Chemical Composition of Cr12MoV Mold Steel

The excellent wear resistance and hardness of Cr12MoV are determined by its high-carbon high-chromium composition, and its detailed chemical composition (mass fraction) is as follows:

Applications of Cr12MoV Mold Steel

Cr12MoV is mainly used in cold work molds, especially in scenarios requiring high wear resistance and high precision. Its main application scenarios are as follows:

1. Cold Stamping Molds

Cold stamping is the main application scenario of Cr12MoV, which can withstand the wear and impact during stamping:

• Precision blanking molds: Precision blanking molds for hardware parts, electronic parts, and auto parts (require high precision and wear resistance).
• Bending molds: Bending molds for sheet metal, steel plates, and hardware parts (require high hardness and wear resistance to avoid mold deformation).
• Drawing molds: Drawing molds for thin-walled parts, such as metal cans, metal shells (require good wear resistance and dimensional stability).

2. Blanking & Punching Molds

Cr12MoV is suitable for blanking and punching molds of various materials, especially thick sheet metal blanking:

• Sheet metal blanking molds: Blanking molds for carbon steel sheets, stainless steel sheets, and aluminum sheets (thickness 0.5-10mm).
• Punching molds: Punching molds for holes in hardware parts, electronic parts, and auto parts (require high precision and wear resistance).

3. Other Cold Work Molds

In addition to stamping and blanking, Cr12MoV is also used in other cold work scenarios:

• Cold extrusion molds: Cold extrusion molds for small metal parts (require high hardness and wear resistance).
• Thread rolling molds: Thread rolling molds for bolts, screws, and other thread parts (require high wear resistance to ensure thread precision).
• Shearing molds: Shearing molds for metal sheets, wires, and other materials (require high hardness and wear resistance).

Heat Treatment Guide for Cr12MoV Mold Steel

Cr12MoV is a high-carbon high-chromium steel, and its heat treatment process is relatively strict. The key is to control the quenching temperature and tempering process to avoid brittleness and deformation. The recommended heat treatment process is as follows:

1. Annealing (Before Processing)

Purpose: Reduce hardness, eliminate internal stress, improve machinability, and dissolve carbides to ensure uniform structure.

• Annealing Temperature: 850-900℃
• Holding Time: 3-4 hours (the holding time is longer than ordinary mold steel to ensure uniform heating and carbide dissolution)
• Cooling Method: Slow cooling (furnace cooling) to 500℃, then air cooling to room temperature
• Annealed Hardness: ≤ 255 HB

2. Preheating (Before Quenching)

Purpose: Avoid uneven heating, reduce internal stress, and prevent mold cracking during quenching. Preheating is particularly important for Cr12MoV to avoid thermal shock.

• First Preheating Temperature: 500-600℃, holding time 1-2 hours
• Second Preheating Temperature: 800-850℃, holding time 1-1.5 hours

3. Quenching (Core Heat Treatment Step)

Purpose: Form a martensitic structure, improve hardness and wear resistance, and dissolve excess carbides.

• Quenching Temperature: 950-1050℃ (the temperature is adjustable according to the mold size and performance requirements; small molds can use 1000-1050℃, large molds use 950-1000℃)
• Holding Time: 1-1.5 hours (ensure full austenitization, but avoid excessive holding time to prevent grain growth)
• Cooling Method: Oil cooling (cool to 150-200℃, then air cooling to room temperature); for large-size molds, air cooling can be used to reduce internal stress, but the hardness will be slightly lower.
• Quenched Hardness: 60-64 HRC

4. Tempering (Improve Toughness and Stabilize Structure)

Tempering is a key step for Cr12MoV, which can eliminate quenching brittleness and improve toughness. Three times tempering is recommended to ensure stable performance:

• Tempering Temperature: 180-220℃ (for high hardness and wear resistance); 280-320℃ (for better toughness)
• Holding Time: 2-3 hours per time, three times tempering (the first tempering eliminates internal stress, the second and third tempering stabilize the structure and improve toughness)
• Cooling Method: Air cooling to room temperature after each tempering
• Tempered Hardness: 58-62 HRC (common for cold work molds)

Performance Advantages of Cr12MoV Compared to Cr12 Mold Steel

Cr12MoV is an improved version of Cr12 mold steel, and its performance is significantly better than Cr12, which is mainly reflected in the following aspects:

• Better Toughness: Cr12MoV adds molybdenum and vanadium elements, which can refine the grain and reduce brittleness. Compared with Cr12, it is not easy to crack during cold work, especially in heavy-load scenarios.
• Better Thermal Stability: Molybdenum element in Cr12MoV can improve thermal stability, making it able to withstand the friction heat generated during cold work without obvious softening, while Cr12 is easy to soften at high temperature.
• Better Dimensional Stability: Cr12MoV has smaller deformation during heat treatment than Cr12, which can ensure higher mold precision, suitable for precision cold work molds.
• Longer Service Life: Due to better toughness and thermal stability, the service life of Cr12MoV mold is 2-3 times that of Cr12 mold, which can reduce mold replacement costs.

Selection Tips & Common Mistakes for Cr12MoV Mold Steel

Selection Tips

• If you need cold work molds with high wear resistance and high precision (precision blanking, drawing) → Choose Cr12MoV (excellent comprehensive performance).
• If you have heavy-load cold work scenarios (thick sheet metal blanking) → Choose Cr12MoV (better toughness than Cr12, not easy to crack).
• If you have limited budget and low requirements on toughness → Choose Cr12 (cheaper than Cr12MoV, but brittleness is higher).
• If you need cold work molds with corrosion resistance → Do not choose Cr12MoV; choose stainless cold work mold steel such as 4Cr13.

Common Mistakes

1. Skipping preheating steps during quenching → Leading to uneven heating, large internal stress, and mold cracking.
2. Using only one or two times tempering → Cr12MoV has high brittleness after quenching; three times tempering is necessary to eliminate brittleness and stabilize performance.
3. Using excessive quenching temperature → Leading to grain growth, reduced toughness, and mold cracking during use.
4. Using Cr12MoV for corrosive cold work scenarios → Cr12MoV has poor corrosion resistance, which will lead to mold rust and shorten service life.

We provide high-quality Cr12MoV mold steel, with complete chemical composition detection reports and heat treatment process guidelines, and free custom cutting, forging and heat treatment services. Our professional engineer team can provide you with personalized heat treatment solutions according to your mold size and application scenario. Contact us now to get a free quote and detailed material data sheet!

AISI D2 (Cr12MoV Grade) High Wear Resistant Hardware Mold Steel Plate Cold Work Steel – KUTU