METAL: The American Sign Language (ASL) sign for "metal / ore / steel"

To do the sign for "metal" or "steel" place an "X" handshape under your chin near your throat.  Slide the X forward about 3 inches and repeat.  The movement isn't like shaving, rather you use a flicking movement. Some people flick it forward at the wrist, others use a bit more of the elbow.

METAL / STEEL:

Iron-[I-R-O-N+ METAL]:

If you are referring to a metal coil one way to convey that is:

Notes: 

See: HAMMER

SCREWDRIVER