Plastic Crusher Blade Material Comparison Test 2025

Plastic crusher blades are made from a variety of materials such as spring steel 65Mn, 5WSiCr, 9CrSi, SKD11, H13, H12, D2, and DC53. They are often used for recycling waste plastic products, tires, used clothes, etc. The following 3 blade materials are often chosen for plastic recycling. 65Mn, 9CrSi and SKD-11.

Why is blade material so important? The Crusher blade is the core component, directly affecting the crushing efficiency, service life, energy costs, and quality of the finished product. Choose the right blade to save high maintenance costs!

1. Comparison of The Three Major Blade Materials of Plastic Crusher

65Mn (Spring Steel)

Advantages: cheap, economical, and practical. Good toughness, not easy to break.

Disadvantages: general wear resistance, shorter life. Easy to rust, needs regular maintenance.

Suitable for the scene: small-scale production, limited budget.

9CrSi (Alloy Tool Steel)

Advantages: High hardness, better wear resistance than spring steel. Stable performance after heat treatment.

Disadvantages: slightly poorer toughness, the impact may be chipped when large.

Suitable for the scene: medium load crushing, such as PP or PE plastic

SKD-11 (Japan Imported Mold Steel)

Advantages: ultra-high hardness, excellent wear resistance. Strong impact resistance, life extension of 3 to 5 times. Good anti-rust performance and maintenance savings.

Disadvantages: higher price.

Suitable for the scene: high-strength crushing, such as ABS or PC, and other hard plastics.

2. Suggestions to Buy The Blades of Plastic Crusher  

Limited budget on the choice of 65Mn spring steel, but it needs diligent maintenance.

Balanced performance on the choice of 9CrSi alloy tool steel, cost-effective.

High-strength crushing requirements on the choice of SKD-11 imported mold steel, more durable, long-term perspective of more money!

3. Maintenance Tips

Regularly check the blade wear.

Clean up the residual material after use to prevent corrosion.

Avoid overloaded operations and hard material pretreatment.