tin plate

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Thin sheet iron or steel coated with tin to prevent rusting, used especially to make cans and pots.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A thin sheet of steel coated with tin to prevent rusting; used to make cans etc.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a thin sheet of metal (iron or steel) coated with tin to prevent rusting; used especially for cans, pots, and tins