How to Choose Between Cermet and Carbide Inserts

1. Material & Hardness

Carbide inserts are made of tungsten carbide with high toughness and strong impact resistance. Cermet inserts are ceramic‑metal composite materials with high hardness, good thermal stability, but lower toughness.

Zhuzhou Jinzuan provides both high‑quality carbide inserts and cermet inserts for different machining needs.

2. Wear Resistance & Toughness

Cermet inserts have better wear resistance and high-temperature stability, making them ideal for high-speed finishing. Carbide inserts offer better toughness and anti‑fracture performance, suitable for roughing and interrupted cutting.

3. Surface Finish Quality

Cermet inserts produce a smoother, brighter surface finish, which reduces or even eliminates secondary polishing processes. Carbide inserts provide stable machining but a relatively rougher surface in comparison.

4. Application & Machining Materials

Cermet inserts: Suitable for finishing steel, alloy steel, and ductile iron with continuous cutting.

Carbide inserts: Suitable for steel, stainless steel, cast iron, hardened steel, and interrupted cutting conditions.

For most metal turning applications, carbide inserts remain the most versatile choice.

5. Cutting Speed & Efficiency

Cermet inserts support higher cutting speeds and feed rates in finishing operations. Carbide inserts balance speed, toughness, and tool life for general machining.

6. How to Choose the Right Insert

Choose cermet inserts if you need:

• High-speed finishing
• Excellent surface finish
• Continuous cutting of steel

Choose carbide inserts if you need:

• Roughing or semi-finishing
• Interrupted cutting
• Versatility for multiple materials
• Better toughness and longer tool life