Three simple ways of narrowing down type of metal are:
- whether it is magnetic or not,
- its colour and
- the colour or type of corrosion.
|Magnetic (ferrous)||Non-magnetic (non-ferrous)|
Brass (copper and zinc)
Bronze (copper and tin)
Nickel silver (copper, zinc, nickel)
|Silvery with marks||Silver
Pewter (tin and lead)
Britannia metal (EPBM) (tin and antimony)
|Silver-grey without identification marks||Lead
|Rust - red||Iron|
Resource: SHCG’s Object Lessons: Metal resource is a really useful starting point to learn how to identify metals.
Also search on firstBASE for metals to find more resources to take your knowledge further.