expendable

An expendable person or object; usually used in the plural.

“Private Johnson was afraid the Lieutenant considered him an expendable, since he was always picked as point man.”

Able to be expended; not inexhaustible.

“Oil and other expendable resources are frequently the subject of military disputes.”

Designed for a single use; not reusable.

“The anti-aircraft rocket is fired from an expendable launch platform.”

Not essential or mandatory in order to achieve a goal.

“The research department was deemed expendable, and its funding was not renewed.”

Regarded as not worth preserving or saving; able to be sacrificed.

“In the internecine rivalries of large corporations, whole departments may become expendable in the execution of one executive's power play.”