1, different properties: nickel-based alloy has high strength and certain anti-oxidation corrosion ability at high temperature of 650-1000℃, while zinc No.3 steel has good corrosion resistance, pressure resistance and weldability.

2. Different uses: Nickel-based alloy is used to manufacture high-temperature components of aero-engine blades and rocket engines, nuclear reactors and energy conversion equipment, and zinc No.3 steel is used to manufacture and decorate building components, such as stair handrails, handrails, door and window frames, etc.