Mild Steel Plate (Sn plating) + Copper

Weldability of the material and electrode material (guideline)

Weldability Very bad
Upper Electrode Cu-Cr-Zr (Equivalent to RWMA-2)
Lower Electrode W100% (Equivalent to RWMA-13)
Mo100%
Special Note Not enough welding strength.
Generating a stick instead of a nugget.
Coating has a chance to melt or burn.

Physical Property

Fe(Sn) Mild Steel Plate (Sn plating)
(Sn) Melting Point 232℃
(Sn) Electrical Resistivity 12.8×10-8Ω・m
(Sn) Thermal Conductivity 66.6 W/(m・K)
(Fe) Melting Point 1535℃
(Fe) Electrical Resistivity 9.7×10-8Ω・m
(Fe) Thermal Conductivity 80.2 W/(m・K)
Cu Copper
Melting Point 1084℃
Electrical Resistivity 1.7×10-8Ω・m
Thermal Conductivity 401 W/(m・K)