| Year | 2020 |
| Date | 05-Jun |
| Volume | 224 |
| Issue | 4,640 |
| Page | 810 |
| Category | Materials |
| Part | 1 |
| Title | Fantastic Materials and Where to Find Them. Ferrous Metals |
| Author | Luker |
| Notes | Says you don't have to rely on suppliers to find the materials you need. Low carbon steels (mild steel), high tensile steels, high carbon steels and tool steels, cast iron, spring materials, biscuit tins, references |