321 Stainless Steel Machining Tips

1. What tools are best for machining 321? Carbide tools with sharp cutting edges to reduce work hardening.

2. What is the optimal cutting speed for 321? 120-200 m/min for turning, lower than 304 due to work hardening.

3. How to reduce work hardening during machining? Use high feed rates and avoid excessive tool contact time.

4. Can 321 be drilled easily? Yes, with sharp drill bits, low speed, and peck drilling to remove chips.

5. Is annealing needed before machining 321? Yes, annealing softens the material and improves machinability.