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Weldability and Joinability of Common Materials

Material
Cast iron	7	10	1	1	3	1	7
Carbon Steel, low-alloy steel	10	10	7	10	10	3	7
Stainless steel	10	7	7	10	10	5	7
Aluminum	7	7	7	7	7	1	10
Magnesium	7	7	7	7	7	1	10
Copper, Copper alloys	7	7	7	7	10	10	7
Nickel, Nickel alloys	10	7	7	10	10	5	7
Titanium	7	1	7	7	3	1	7
Lead	7	7	1	3	1	10	10
Zinc	7	7	1	3	1	7	10
Thermoplastics	10^*	10^**	1	7^***	1	1	7
Thermosets	1	1	1	1	1	1	7
Elastomers	1	1	1	1	1	1	10
Ceramics	1	1	7	1	1	1	10
Dissimilar metals	3	3	7	3	3 - 7	N/A	10

Note: 10 = Execllent, 5 = Fair, 1 = Seldom/never used.
* : Heated tool; ** : Hot gas; *** : Induction.