About 200|Commercially pure nickel (99.6%). Excellent corrosion resistance in reducing environments, particularly caustic alkalis. Good electrical and thermal conductivity. Machines tougher than you'd expect from a pure metal. The nickel wants to work-harden and produce long, gummy chips. Use sharp carbide, moderate speeds, high feed rates, and flood coolant. Similar machining approach to 304 stainless but slightly better chip formation. Used for chemical processing equipment, food processing, and caustic handling. Compare to Alloy
400 (stronger, better for mixed acid environments) and C110 copper (better conductivity, much worse corrosion resistance).