- This group contains non-ferrous, soft metals with hardnesses under 130 HB, except for high strength bronzes (>225HB)
- Aluminium (Al) alloys comprising less than 12-13% silicon (Si) represent the largest part
- MMC: Metal Matrix Composite: Al + SiC (20-30%)
- Magnesium based alloys
- Copper, electrolytic copper with 99.95% Cu
- Bronze: Copper with Tin (Sn) (10-14%) and/or aluminium (3-10%)
- Brass: Copper (60-85%) with Zinc (Zn) (40-15%)
Machinability of aluminum
- Long-chipping material
- Relatively easy chip control, if alloyed
- Pure Al is sticky and requires sharp cutting edges and high vc
- Specific cutting force: 50,750-101,500 lbs/inch² (350–700 N/mm²).
- Cutting forces, and thus the power required to machine them, are low.
- The material can be machined with fine-grained, uncoated carbide grades when the Si-content is below 7-8%, and with PCD- tipped grades for Aluminum with higher Si-content.
- Over eutectic Al with higher Si-content > 12% is very abrasive.
Engine block, cylinder head, transmission housings, casings, aerospace frame components.
MC codes for N-materials