In this step, we assign AISI 4130 steel to the pin and the two screws.
- Select the pin. While holding Ctrl, select the two screws.
- Right-click in the display area, and select Edit
Material. 
- Expand the Steel and AISI branches. Select Steel (AISI 4130), and click OK.
- When asked to confirm, click Yes.
What it should look like…
