Most companies will send you a spec book for the asking, two companies I deal with are:
Russell Metals
28 Lakeside Park Drive
Lakeside
Nova Scotia
Canada
B3T 1A3
-or-
Leroux Steel Inc.
1331,rue Graham-Bell
Boucherville
Quebec
Canada
J4B 6A1
Of the two books, the one from Russell has more info about diffrent metals, brass, s/s, copper etc...Mike