non linear B-H characteristics

Yes, steel is a ferromagnetic material.

Iron is ferromagnetic and when combined with silver, the resulting alloy loses its ferromagnetic properties.

No, silver is not ferromagnetic. It is classified as a non-magnetic metal because it does not have strong magnetic properties like ferromagnetic materials such as iron, nickel, and cobalt.

No, water is not ferromagnetic. Water is diamagnetic, meaning it is slightly repelled by magnetic fields.