How do i put in the weight of my 44W material part
As John indicated, it looks like you may not quite understand the way Material works. For example, I see you have several different sizes of pipe listed. That's not necessary. For example, let's say that this is PVC pipe. When you create a part, you'd go to "SolidWorks Materials", expand "Plastics", then select "PVC Rigid" from the drop-down. As you can see, the Mass is defined by cubic millimeters, so when this material is applied to a part, the Mass will be calculated automatically regardless of the Part's shape, thickness, length, etc.
Fill in your material mass density.
Stuart, you don't put part weights in materials. The materials library contains the properties of given types of matter by unit of volume, not by the piece.
If you want to be able to say how much your part weighs instead of having SolidWorks calculate it, go to Tools=>Mass Properties; click the Override Mass Properties button and in the dialog box that appears, check Override mass: and enter the weight
You can also override other physical properties of your part from this dialog box.
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