commonly used gear pump material properties
1. carbon steel: very good abrasion resistance and common corrosion resistance
2. tool steel: excellent abrasion resistance and common corrosion resistance
3. stainless steel: extraordinary corrosion resistance, appropriate price and common abrasion resistance
4. reinforced stainless steel: extraordinary corrosion resistance, excellent abrasion and high price
5. alloy stainless steel: an experience material with the widest corrosion resistance
6. composite material: has wide chemical compatibility
7. hard alloy: an expensive material with excellent absrasion resistance properties
