The ornamental design for a portable weldingkitcontainer, as shown and described.
FIG. 1 is a perspective view of a portable welding kit container showing my design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a rear elevational view thereof; and,
FIG. 6 is a top plan view thereof.
The bottom is unornamented and disclaimed. The broken lines immediately adjacent to the shaded area represent the boundaries of the claimed design. Other broken lines represent the portions of the design form no part of the claim. None of the broken lines form part of the claimed design.