1. Metals
Pellet dies are made of metals, which determines the features and working life of pellet dies. Generally, pellet dies are usually made of the following metals, such as alloy, stainless steel, and "Chrome-Plus"stainless steel, etc.
Alloy pellet die is satisfactory for pelletizing common feed stocks. However when the corrosive materials, the stainless steel pellet die may perform better.
Stainless steel contented chromium can provide better resistance to corrosion, pitting and scoring and die hole enlargement.
Pellet die made of “ Chrome-Plus” stainless steel is usually a choice for pelletizing ingredients with strong abrasive or corrosive characters.