Industrial knife material selection notes

This note is a practical RFQ guide, not a universal hardness or heat-treatment standard.
Final material and hardness should be confirmed against feed material, knife geometry, machine stage, and customer drawings.

Common starting points:

- D2 / SKD11 / Cr12MoV
  Often considered for wear-resistant crusher, granulator, and recycling knives when the feed is abrasive but impact is still controlled.

- HSS / M2
  Often considered when edge stability and cutting temperature matter, such as selected pelletizer, trim, or high-speed cutting positions.

- 9CrSi
  Often considered for cost-sensitive replacement knives where the application is not extremely abrasive.

- H13
  Often considered where toughness and thermal fatigue resistance matter more than pure wear resistance.

- Tungsten carbide / carbide insert
  Often considered for high-wear insert positions, but brittleness and seat support must be checked carefully.

Always confirm:
- Knife length, width, thickness, and hole pattern
- Edge direction and bevel angle
- Rotor knife and bed knife / counter knife relationship
- Whether the current failure is wear, chipping, bending, cracking, dust, or poor particle size
- Whether the line has metal contamination, sand, glass, stones, or mixed hard scrap