Making a working product
A useful material becomes one part of an object. Fabrication, joining, filling, garment making or device assembly brings components together. The finished product must coordinate load paths, electrical paths, seals, interfaces and access—not simply contain a list of ingredients.
What changes?
A phone combines conductors, insulators and structural parts; a bottle needs a compatible closure; a chair relies on its joints as well as its seat material. Assembly therefore connects material selection with geometry, tolerances, maintenance and the expected conditions of use.
What the diagram leaves out
Product-level performance cannot be inferred from a material name alone. The same alloy or polymer can be used in well-designed or unsuitable constructions. Repairability and end-of-life separation also depend on fasteners, adhesives, coatings and the way parts are accessed.
What to look for next
Return to the object diagram and examine the boundaries between components. Those interfaces often explain the most interesting trade-offs.
Follow a real material.
Nickel
A small addition can change the whole material.
MetalsTin
A thin coating or a tiny electrical joint.
MetalsGold
A precious surface for a reliable contact.
MetalsLithium
A moving ion inside a rechargeable cell.
Elements & mineralsCobalt
Different chemistry, different job.
Elements & mineralsGraphite
From a pencil mark to a battery electrode.
Elements & mineralsSilicon
The carefully controlled crystal inside electronics.
Elements & mineralsAluminosilicate glass
A carefully engineered surface for a pocket-sized screen.
Glass & ceramicsSilica
The same chemistry can have different structures.
Elements & mineralsPET
A clear bottle and a fleece share a polymer.
PolymersHDPE
A tougher bottle from more orderly chains.
PolymersPolypropylene
A moulded hinge that bends again and again.
PolymersFollow the evidence
Original explanations informed by the sources below. Technical and industry sources support material behaviour; industry environmental marketing is not treated as a universal comparison. Read our editorial method.
- Nickel — element information, properties and uses ↗Royal Society of Chemistry · Undated · Checked 2026-11-13
- Mineral Commodity Summaries 2026 — Nickel ↗U.S. Geological Survey, National Minerals Information Center · 2026-05-27 (version 1.3) · Checked 2026-11-13
- How Do I Recycle Common Recyclables ↗U.S. Environmental Protection Agency · Undated · Checked 2026-11-13
- Tin — element information, properties and uses ↗Royal Society of Chemistry · Undated · Checked 2026-11-13
- Mineral Commodity Summaries 2026 — Tin ↗U.S. Geological Survey, National Minerals Information Center · 2026-05-27 (version 1.3) · Checked 2026-11-13
- Gold — element information, properties and uses ↗Royal Society of Chemistry · Undated · Checked 2026-11-13
- Mineral Commodity Summaries 2026 — Gold ↗U.S. Geological Survey, National Minerals Information Center · 2026-05-27 (version 1.3) · Checked 2026-11-13
- Lithium — element information, properties and uses ↗Royal Society of Chemistry · Undated · Checked 2026-11-13
- Mineral Commodity Summaries 2026 — Lithium ↗U.S. Geological Survey, National Minerals Information Center · 2026-05-27 (version 1.3) · Checked 2026-11-13
- Technology Strategy Assessment — Lithium-ion ↗U.S. Department of Energy · 2023-07 · Checked 2026-11-13
- Cobalt — element information, properties and uses ↗Royal Society of Chemistry · Undated · Checked 2026-11-13
- Mineral Commodity Summaries 2026 — Cobalt ↗U.S. Geological Survey, National Minerals Information Center · 2026-05-27 (version 1.3) · Checked 2026-11-13
- Mineral Commodity Summaries 2026 — Graphite ↗U.S. Geological Survey, National Minerals Information Center · 2026-05-27 (version 1.3) · Checked 2026-11-13
- Silicon — element information, properties and uses ↗Royal Society of Chemistry · Undated · Checked 2026-11-13
- Mineral Commodity Summaries 2026 — Silicon ↗U.S. Geological Survey, National Minerals Information Center · 2026-05-27 (version 1.3) · Checked 2026-11-13
- Solar Photovoltaic Manufacturing Basics ↗U.S. Department of Energy · Undated · Checked 2026-11-13
- Types of Technical Glasses ↗SCHOTT · Undated · Checked 2026-11-13
- Main properties of SCHOTT glass ↗SCHOTT · 2026-07 · Checked 2026-11-13
- Silica ↗Sibelco · Undated · Checked 2026-11-13
- Silica is safe — frequently asked questions ↗Evonik · Undated · Checked 2026-11-13
- Silica dust ↗UK Health and Safety Executive · Undated · Checked 2026-11-13
- Polyesters (Thermoplastic) PETP, PBT, PET ↗British Plastics Federation · Undated · Checked 2026-11-13
- Plastics Processes ↗British Plastics Federation · Undated · Checked 2026-11-13
- The Facts about PET ↗Dr Frank Welle; Petcore Europe · 2018 · Checked 2026-11-13
- Polyethylene (High Density) HDPE ↗British Plastics Federation · Undated · Checked 2026-11-13
- Polypropylene (PP) ↗British Plastics Federation · Undated · Checked 2026-11-13